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What's in the Simulator 12.0 Patch?
Select one of the following links
to view descriptions of the changes incorporated via the PowerWorld Simulator
Patch files
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View Change
Descriptions by Date:
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View All New Features/Improvements by Topic:
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View All Bug Fixes by Topic:
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Changes Made by
Patch Date:
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- June
26, 2006
- July
10, 2006
- July
18, 2006
- July
27, 2006
- July
28, 2006
- August
7, 2006
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August 24, 2006
- August
31, 2006
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September 6, 2006
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September 19, 2006
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October 11, 2006
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October 30, 2006
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-
November 9, 2006
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November 10, 2006
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November 28, 2006
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December 1, 2006
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December 21, 2006
- January 3, 2007
- January 10, 2007
- January 19, 2007
- January 25, 2007
- January 30, 2007
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February 7, 2007
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February 13, 2007
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February 16, 2007
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February 23, 2007
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February 27, 2007
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February 28, 2007
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- March
8, 2007
- March
15, 2007
- March
20, 2007
- March
21, 2007
- March
26, 2007
- April
5, 2007
- April
10, 2007
- April
11, 2007
- April
20, 2007
- May 4,
2007
- May 9,
2007
- May 17,
2007
- May 29,
2007
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- June 1,
2007
- June 8,
2007
- June
26, 2007
- July 5,
2007
- July 11,
2007
- July
27, 2007
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August 21, 2007
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September 26, 2007
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October 1, 2007
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October 2, 2007
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November 15, 2007
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November 21, 2007
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December 5, 2007
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January 12, 2008
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January 28, 2008
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February 6, 2008
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Top
New Features
- Auxiliary Files: Modified the
Simulator-created auxiliary files for contingency settings, limit monitoring settings,
etc... so that when they using the SelectAll()
script commands they are followed later by
UnselectAll() commands, so that in the end all
objects are not selected.
- Case Information Displays: Added
fields to the transmission branch Display/Column
options to show the MW Marginal Cost at the From
and To Bus.
- Oneline Diagrams: Modified Measure
Lines so that when showing Oneline hints,
the measure line will always show a hint with
the length of the line.
- Oneline Diagrams: Modified so that if
a PWD file is marked as read-only, then
Simulator will not prompt the user to save the
oneline.
- User Interface Dialogs: added Max MW,
Min MW, and AGC status fields to the columns on
the Line Loading Replicator dialog.
- User Interface Dialogs: Added a
keyboard shortcut on the choose dialogs which
list devices by name or by number. Now if
you click Ctrl-S while entering the name or
number it will switch the sort order.
- Contingency Analysis: Modified so
that area MW transactions are stored as part of
the contingency reference state.
- File Formats: Modified to allow
non-series capacitor branches to be read from a
GE EPC file as bypassed.
Bug
Fixes
- User Interface Dialogs: When using
the PTDF dialog to "toggle the flow
visualization", errors could occur if the
initial flow visualization was not set to MW
values only. This has been fixed.
- Case Information Displays: The value
for OPF Transmission Charge associated with a DC
Transmission line was always displayed as a zero
in the case info display. This has been
fixed.
- Case Information Displays: Modified
so that Super Area can be deleted in Run Mode.
- Oneline Diagrams: PowerWorld
internally limits the number of vertices on a
graphical line to 32,767. When reading in
very detailed GIS Shapefiles however it's
possible to come across a line with more points
than this. This is now properly handled by
splitting the line up into pieces.
- Oneline Diagrams: When inserting a
bus graphically which was connected to a DC
transmission line, an access violation would
occur. This has been fixed.
Return to date list
New Features
- Oneline Diagrams: Added support for drawing
dashed lines with thickness greater than 1. Also
fixed so that printing of dashed lines works
throughout.
- Oneline Diagrams: Modified the Format Dialog
so that field prefixes can be edited for
selected objects.
- Oneline Diagrams: Modified so that when
applying the default drawing values to
transformers it properly applies two colors.
- Oneline Diagrams: Added the ability to
right-click on a generator, load, line, etc...
display object which has an an associated memo
and bring up that memo in a dialog.
Bug
Fixes
- Oneline Diagrams: Added code to prevent any
background line from having greater than 32767
points. Simulator does not presently handles
lines with more points than this.
- Oneline Diagrams: Modified the interaction
of the Measurement System setting and
line/transformer display dialog so that it
maintains the distance value properly.
Return to date list
New Features
- Oneline Diagrams: Modified the
Contour Type dialog so that only object types
that are on the screen appear on the dialog.
- Oneline Diagrams: Added ability to
use an ellipse or a polygon to select objects on
the oneline diagram.
- Oneline Diagrams: Modified the
rectangle and ellipse selector so that holding
the Ctrl key down will center the selection
region around where you click.
- Oneline Diagrams: Modified the
rectangle and ellipse selector so that holding
the Shift key down will force the region to be a
square or a circle.
- Auxiliary Files: Added better error
messages when pasting data from Excel or when
reading in an AUX file so to better explain why
a new object can not be create.
- Auxiliary Files: Modified pasting
from Excel and reading in an AUX file so that
new objects can not be created if the required
fields are blank.
Bug
Fixes
- General: Simulator was running a
background process when nothing else was
occurring with Simulator which was using up a
large amount of CPU resources. This was
not necessary and has been fixed to run less and
at a lower CPU priority.
- Oneline Diagrams: Fixed minor display
error of the generator AVR status on a oneline
diagrams. It was possible for a generator to
show that it was at a VAR limit when it was
actually not. This could only happen if there
were multiple generators at the bus and you had
recently changed the status of one of them.
- File Formats: Fixed a potential fatal
error when reading in the Q Table section of a
version 15.1 EPC file.
- Power Flow Solution: Cleaned up the
behavior when choosing to not allow Simulator to
dynamically assign slack buses as necessary.
- Power Flow Solution: Simulator
Version 12 added special matrix manipulation
which increased matrix calculation speed on
newer processors by about 10%. Older processors
however ran this code more slowly. A check was
added so that the older processors would revert
back to the previous matrix routines.
- Contingency Analysis: Fixed the
routine for reading in the PTI *.con file and
old PowerWorld *.ctg format. I/O errors were
occurring when doing this.
- Fault Analysis: Modified the sequence
data file read routines so that they only sort
records after reading in the entire file.
Previously it was resorting after every record
which resulted in an extremely slow file read.
Return to date list
New Features
- Oneline Diagrams: Added ability to
copy the format attributes of display object and
then paste that format information to the
selected display objects. This is done using a
Copy Format and Paste Format toolbar button and
menu option or via the right-click popup menu on
a selection.
- Case Information Displays: Added a
new Bus column for showing the power factor of
the combined load and shunt at a bus.
Bug
Fixes
- General: Modified so that the
background process Simulator was running is no
longer run at all.
- Oneline Diagrams: Fixed bug in
selecting some objects using the new ellipse and
polygon selector which was causing some objects
to always be selected when they were too small
to see.
- Auxiliary Files: Auxiliary files were
only supporting up to 256 variable names in a
single data section. This limitation was
unnecessary and the limit has been removed.
- File Formats: Modified the writing
out of the GE EPC files which are filtered by
area so that MW transactions that don't meet the
filter are not written.
- Power Flow Solution: Fixed bug with
phase-shifting transformer control which
occurred when the phase-shifter was connected to
the system slack bus.
- PV and QV Curve Tools: Add the
ability to save the tracking of devices hitting
limits to the results in an AUX file.
- User Interface Dialogs: Modified the
split bus and merge bus dialogs so that you can
specify a new bus number larger than 5
characters. Simulator allows bus numbers up to
2,147,483,647 generally.
- User Interface Dialogs: Changed made
for better handling moving the terminals of a
three-winding transformer to another bus
Return to date list
New Features
Bug
Fixes
- Auxiliary Files: Added checks to
catch invalid SUBDATA sections which are not
terminated properly by a </SUBDATA> tag.
Proper error handling is now done.
- Case Information Displays: Corrected
an error that occurred when creating a new
record by pasting data from Excel. This
error was introduced in the previous patch on
July 27.
- User Interface Dialogs: When opening
the Simulator Options Dialog, the injection
group for use in Island-Based AGC was always
being reset to the first injection group.
This has been fixed.
Return to date list
New Features
- Contingency Analysis: Added the old
"Combined Definition and Violation Table" back
into Contingency analysis. PowerWorld generally
recommends using only the Combined Violation
Table and Combined Definition Table options.
- Auxiliary Files: When choosing to
write out interfaces using Name_kV values as the
secondary key fields, Simulator was still
writing out numbers. This has been fixed.
Bug
Fixes
- Case Information Displays: Fixed
access violation caused by reading in a case
that has unlinked objects in the Custom Case
Information and then trying to save that case
again.
- Optimal Power Flow: Modified the
Area, Zone, and Substations objects
average/min/max/std of MW Marg. Cost calculation
so that they are determined dynamically from the
Bus data. Previously they were calculated only
after solving the OPF, which made it so that
user-entered bus data could not be used for
these dynamically calculated values.
- Optimal Power Flow: Fixed incorrect
Total Cost calculate for a generator which would
occur when negative prices were included in a
bid curve.
- Oneline Diagrams: Fixed access
violation bug with graphically inserting a new
transformer on a oneline diagram.
- Oneline Diagrams: Fixed error when
bringing up the contour dialog when there were
no buses on the oneline diagram.
- Oneline Diagrams: Fixed white line
which would appear to the right and bottom of
the contour image.
Return to date list
New Features
- Contingency Analysis: Added new
option of "RESPOND" to the
PostCTGPreventAGCResponse option. This forces
the generator to respond durin the
post-contingency solution.
- Contingency Analysis: Added the
ability to view element labels when viewing
violations in the contingency tool.
- Contingency Analysis: Added the
ability to pan to object on oneline when
selecting a limit violation in the contingency
tool. It will pan to the violated element now.
Bug
Fixes
- User Interface Dialogs: Fixed the
interaction of the TransLineCalc tool with the older
line impedance dialog that doesn't include the
line spacing.
- Oneline Diagrams: When auto-inserting
transmission lines, an unnecessary slow call was
being made slowing down the auto-insert routine.
This has been removed.
- Oneline Diagrams: When saving Oneline
solution options to an AUX file, the color BLACK
was not be read back in correctly and was being
ignored. Only the color of black (Integer = 0)
had this problem.
- Oneline Diagrams: When deleting a
Screen Layer, and choosing the option to "Delete
all objects in layer" also, Simulator was not
deleting the objects and was instead assigning
them to the default layer. This has been fixed.
- Oneline Diagrams: When choosing to
apply a Saved "Oneline Form Option" to a oneline,
if you were using a display detail filter to
show objects in a particular layer, the objects
would not come forward if they were presently
not visible. This has been fixed.
- Oneline Diagrams - Fixed bug occurring when
objects that were set to a fixed screen locations were
displayed along with the Thumb Nail View. This was
resulting in erratic movement of the objects.
Return to date list
New Features
Bug
Fixes
- File Formats: Fixed syntax error when
writing out PTI *.CON contingency files. We were
not writing a space between the OPEN BUS phrase
and the bus number.
- Oneline Diagrams: Fixed bug with
using the Area, Zone, Substation, and Bus
renumbering tools. When reading the swap list
from an auxiliary file, it was not working
properly.
- Available Transfer Capability (ATC):
On the ATC Dialog, when using a Super Area as
the buyer or seller, the Increase Transfer
button on the Analysis Tab was not working. This
has been fixed.
- User Interface Dialogs: When choosing
to insert a new MW Transaction from the
Transactions List the Transaction Dialog is
opened. When inserting a new transactions,
clicking on the Switch Directions button caused
an access violation. This has been fixed.
Return to date list
New Features
Bug
Fixes
- General: Modified so the auto-save
PWB file option so the auto-saved files are
always saved to the directory of the last opened
case file.
- Case Information Display: Fixed an
access violation that could occur when
contouring columns in a string grid.
- Case Information Display: When using
the 2D or 3D graphing option, an error could
occur when closing the graph. This is now fixed.
- Oneline Diagrams: If a oneline has no
buses or substations on it and you inserted a
generator, load, or switched shunt object on a
oneline, then the default drawing values could
not be looked up for the dialog initially. This
was OK, but after completing the insertion of
the object it saved the values from the dialog
back to the default drawing values which it
should not do. This has been fixed.
- Fault Analysis: Errors were fixed in
the fault analysis which could cause problems
when solving a several faults while the fault
dialog was open.
- User Interface Dialogs: Changed the
font color of the drop-down menu on the Dynamic
Formatting Dialog.
- Power Flow Solution: Simulator's AGC
routines had a problem if a Super Area contained
an Area which had no load AND no scheduled
transactions. This could result in some small
movements of generation after each solution.
This has been fixed.
- Available Transfer Capability: When
using the Solution Method (IL) then Full
contingency, the calculation of the linear step
which is done after the full contingency
solution was using the solution options and
control settings for the post-contingency state.
The problem with is that the post-ctg generator
AGC status' may be quite different than the
pre-contingency ones. To fix this, the
pre-contingency AGC status are restored prior to
calculating another linear step.
Return to date list
New Features
Bug
Fixes
- Power Flow Solution: When switching
from Run Mode to Edit Mode, Simulator was
temporarily setting the system so that it was
NOT using the DC approximation. When switching
back to Run Mode it would automatically reset
back to the DC approximation. This switching was
unnecessary, and if the user saved the PWB file
while in Edit mode it would be saved with the DC
approximation option not matching the present
system state.
- PV and QV Curve Tool: Changed column
captions and field descriptions of the "Critical
P and Q" values to say "Max P Mism" and "Max Q
Mism" to better reflect what they are.
- User Interface Dialogs: Fixed error
with setting the "Neutral Grounded" check box on
the Fault Parameters on the generator dialog
when in Edit Mode.
Return to date list
New Features
- File Formats: Added an warning
message to the log when reading in a RAW file
which has extra text past the end of the file.
- Oneline Diagrams: Added the ability
to modify the oneline hints to change the time
delay at which the hint will appear and then
disappear, the maximum pixel width of the hint,
and the font attributes (size, name, and style)
of the hint.
- Oneline Diagrams: Made the contour
visible in the thumbnail view
- Oneline Diagrams: Cleaned up some
issues with making the thumbnail view
translucent when having the thumbnail follow the
mouse cursor.
- Available Transfer Capability (ATC):
Added easier access to the island-based AGC
control options regarding injection groups.
These options are used when iterating the ATC
between injection groups.
Bug
Fixes
- General: Modified throughout to
prevent a switched shunt block with either zero
blocks or zero Mvars to ever exist.
- File Formats: Fixed a bug when
reading transformer elements from the NERC Book
of Flowgates which resulted in the transformer
being monitored in the wrong direction.
- Case Information Displays: Fixed the
pasting of participation points directly into
the participation point case information
display.
- User Interface Dialogs: Modified the
tap transmission line dialog so that you can
specify a new bus number larger than 5
characters. Simulator allows bus numbers up to
2,147,483,647 generally.
- User Interface Dialogs: Fixed bug on
the Default Drawing Values form which resulted
in an access violation when editing a value on
the case info display and then closing the
dialog before finishing the edit.
- Oneline Diagrams: Fixed bug that was
showing the Mvar flow as the MW flow when using
the animated arrows mode "MW and Mvar flow".
- Sensitivity Calculations: When an
interface met the following criteria: Branch A
was being monitored, Branch B was being outages,
and Branch A was presently OPEN, the Interface
flow should report a flow of zero. It was not
properly showing zero and this bug has been
fixed.
- PV and QV Curve Tool: If an output
file name is not specified, then the PV Curve
log file will no longer be created. This was
added to prevent two instances of Simulator from
trying to write to the same log file.
- Available Transfer Capability (ATC):
Modified the storage of the ATC Initial System
State so that it recreates the system state each
time the state is updated. Previously it only
updated the system state which would not work
correctly if the user modified the system after
using the ATC tool.
- Available Transfer Capability (ATC):
When iterating on a specific transfer
limitation, previously Simulator was not clearly
indicating when the buyer or seller runs out of
injection. This is now clearly indicated by
adding a Transfer Limitation related to the
Buyer or Seller Reserves. This limitation is
added regardless of the user option about
reporting reserve limitation. Also the ATC
iteration is stopped at this point.
- Available Transfer Capability (ATC):
When iterating on a specific transfer
limitation, Simulator no longer considers the
user option regarding "Ignore Limiters Below".
Previously this could cause problems.
- Optimal Power Flow (OPF): A bug was
fixed on April 17, 2006 in Simulator 11 which
handled control variables approaching infinity.
PWB files saved before this could have an
invalid OPF state saved. This will be fixed when
reading in PWB files now.
Return to date list
New Features
- Case Information Displays: Removed
the constant power, current, and impedance MW
and MVar columns as default for Load Records.
The total MW and MVar columns are now shown
only.
- Oneline Diagrams: Added the ability
to rotate through onelines specified in the
keyboard shortcuts in a "slideshow". To cancel
the slide show just press the ESC key.
- Available Transfer Capability (ATC):
When using a Super Area as a buyer or seller in
the ATC, PTDF, TLR, and voltage senstivities the
area participation factors defined for the super
areas are used to calculate appropriate
sensitivities
- Sensitivity Calculations: When using
a Super Area as a buyer or seller in the ATC,
PTDF, TLR, and voltage senstivities the area
participation factors defined for the super
areas are used to calculate appropriate
sensitivities
Bug
Fixes
- General: When moving a generator from
one bus to another, Simulator was not always
properly updating some internal structures
resulting an an error. This has been fixed.
- User Interface Dialogs: Fixed an
error when using the Merge Bus routine which
could result an invalid power system.
- User Interface Dialogs: Added better
support for storing the initial state in the
Time Step Simulation to allow reseting the
initial state.
- Case Information Displays: In the
Injection Group, Participation Point grid, the
copying and pasting of data was no longer
working. This has been fixed.
- Case Information Displays: In the
Injection Group, Participation Point grid, fixed
the toggling of the AutoCalc column to work
properly.
- Oneline Diagrams: Fixed an error when
auto-inserting interfaces which resulted in the
pies charts being unlinked.
- Oneline Diagrams: Fixed an error
which could result in Emphasis highlighting now
working correctly.
Return to date list
New Features
- Case Information Displays: Add the
ability to "Send to Open Office" which mimicks
the "Send to Excel" feature.
- Oneline Diagrams: Added the ability
to save the oneline slideshow settings with the
Simulator Environment auxiliary file.
Bug
Fixes
- File Formats and User Interface Dialogs:
When using the Super Area dialog and
specifying Area Participation Factor with each
area, these particpation factors would be reset
to 1.0 for all areas after reading in a PWB
file, or after opening the Area Dialog. This has
been fixed so that the values do not get reset.
- Simulator Automation Server (SimAuto):
When using the SendToExcel SimAuto function call
and passing the keyword "all", Simulator will
include a set of default fields. Previously
Simulator required the string to be in all lower
case with no spaces. This requirement has been
removed.
- Oneline Diagrams: Fixed the list of
oneline display objects dialog so that groups
are properly displayed.
- Oneline Diagrams: When grouping
background objects, the grouped objects were not
being drawn in the appropriate stack level.
Groups behaved as though they were in the Middle
Level. This has been fixed.
- Oneline Diagrams: When reading an
ESRI Shapefile, objects that were grouped were
being assigned to the Default Layer instead of
the user-specified one. This has been fixed.
- Contingency Analysis: Fixed potential
divide-by-zero error when using the Linearized
Contingency Analysis and monitoring amp limits.
- Contingency Analysis: When deleting a
Model Condition or Filter, the link from a
contingency element to the model criteria was
not be properly removed resulting in an access
violation. This has been fixed.
- Available Transfer Capability (ATC):
Fixed error that could occur when using the
Iterated ATC solution methods resulting in
incorrect LODF calculations when iterating on
particular transfer limiters.
- Optimal Power Flow (OPF): Previously
the data shown on the LP OPF Dialog, Results,
Bus Marginal Controls tab where not populated
until you looked at that list display. This
prevented the data from being obtained via a
script or SimAuto call. The data on that display
is now calculated when ever the user asks for it
regardless of whether it is to visualize it or
grab it via a script or SimAuto Call.
Return to date list
Bug
Fixes
- Contingency Analysis: Interfaces that
contain contingent elements can now be monitored
if using the Full Power Flow method and AC Power
Flow.
Return to date list
New Features
- File Formats: Added ability to save
the DC power flow "B Matrix" equation out to the
matlab m-file format.
- File Formats: When writing EPC files,
the two-terminal DC transmission lines' DCLine
aloss value is now populated with a 0.0 or a 1.0
depending on the metered end of the DC Line.
- File Formats: When reading EPC files,
a two-terminal DC lines uses the DCLine aloss
value to set the metered end of the DC line.
- File Formats: When writing EPC files,
any two-terminal DC transmission lines which is
blocked is now written with all DC converters
labels as status = 0.0
- File Formats: When reading EPC files,
the three-winding transformer tap ratios are
calculated from the transformer base values
including fixed taps. These calculations are
only precise to 4 decimal points due to the EPC
file only writing 4 decimals. Simulator will now
round the calculated values to 4 decimal points
when reading. This is so that tap ratios of
1.00002 and 0.99998 do not show up all over.
- File Formats: When reading EPC files,
the continuous switched shunts now properly set
a flag to initialize them to at a max or min
limit if appropriate.
- File Formats: EPC Files do not
support having any load, generation, or shunt
devices connected to the intermediate buses of a
multi-section line. If a case had such devices
they would be missing from the resulting EPC
file. To fix this, Simulator will write out the
branches as individual branches and the fact
that a multi-section line exists will be lost in
the EPC file format.
- File Formats: EPC Files do not
support having different statuses for the
windings of a three-winding transformer. If a
case had such devices the resulting EPC file was
inconsistent. To fix this, Simulator will write
out the branches as individual branches and the
fact that a three-winding transformer exists
will be lost in the EPC file format.
- Auxiliary Files: Added better message
log descriptions when an object has blank values
for required fields.
- Case Information Displays: Added the
Paste option to the Model Expression Case
Information Display.
- Case Information Displays: When
changing the status of a multi-section line,
simulator forced a refresh of all open dialogs.
This has been removed to speed up changing the
status of a multi-section line. However, manual
refreshes of some displays may now be necessary.
- Case Information Displays: Added a
new column for a Bus which shows whether a bus
is either an intermediate bus of a multi-section
line or a star bus of a three-winding
transformer.
Bug
Fixes
- File Formats: When reading in a RAW
file which contained multi-section lines and
then saving this file to a PWB file, the
multi-section line definitions were not being
maintained. This has been fixed.
- File Formats: When writing EPC files,
if generation ownership was specified such that
generators were not owned by the same owner as
their terminal bus, then an index out of range
error would occur. This has been fixed.
- File Formats: When writing EPC files,
the secondary and tertiary winding tap ratios
were not being scaled to match the transformer
base. This has been fixed.
- File Formats: When writing EPC files,
a floating point error could occur when writing
two-terminal DC lines which were marked as
blocked. This has been fixed.
- File Formats: When writing EPC files,
the two-winding transformers' magnetizing
reactance values were not being written out.
- File Formats: When writing EPC files,
the three-winding transformers' secondary and
tertiary MVA limits were written with values
divided by 100 (Sbase).
- File Formats: When reading EPC files,
for two-terminal DC transmission lines the
setpoint specified end was always being set to
the rectifier. This is now properly set to the
appropriate end as specified in the EPC file.
- Case Information Displays: When
right-clicking on a case info display and
choosing Load, Auxiliary File, Simulator was not
properly sending messages to the message log.
This has been fixed.
- Case Information Displays: Modified
Model Expressions so that the variable names are
no longer required fields. This was preventing
model expressions from being read in if the
fields were blank.
- Case Information Displays: On the
Three Winding Transformer Case Information
display, the display of the Nominal voltage, MW
flow and Mvar flow on the windings was
incorrect. The primary flows were actually the
secondary, secondary were tertiary, and tertiary
were blank. This was only an output error but it
has been fixed.
- Sensitivity Calculations: When
performing LODF calculations for interfaces that
contain multiple contingency elements, if the
contingency elements resulted in the creation of
new islands, this was not being handled
correctly. This is now properly handled.
- Fault Analysis: Fixed bug where step
up transformers implicitly modeled with
generators were incorrectly ignored in the zero
sequence if the generator machine itself was
designated as ungrounded.
- Fault Analysis: Fixed bug where
series capacitor X values for zero sequence
matrix were incorrectly replaced with MinLineX
of 0.00001.
Return to date list
New Features
- General: Added an option for
performing the case autosave even when in Run
Mode.
- File Formats: Added a new option in
the GE EPC Format (*.epc) (with Options) which
allows you to specify that the GE Generator Base
Load Flag should be interpreted as the "Post-CTG
Prevent AGC Response" field in Simulator.
- Bus View and Sub View: Added the
ability to use the up and down arrows when you
are on the edit box for the bus or sub number or
name. When doing so it will cycle through
the buses or substations in numerical order.
Bug
Fixes
- User Interface Dialogs: Fixed bug on
scaling dialog which prevented you from changing
the Scale field for a Bus sometimes.
- Available Transfer Capability: If a
extremely small solution convergence tolerance
was used, it was possible in very strange
circumstances for the iterated ATC Solution
methods to get into an infinite loop. This
would occur when the ramping out of the transfer
was done and was caused by the ramping tolerance
being equal to 10 times the solution tolerance.
This was fixed by setting the ramping tolerance
to a value no smaller than 0.1 MW.
Return to date list
New Features
- Sensitivity Calculations: Modified
the calculation of interfaces with contingent
elements when the contingent elements result in
isolated buses. Contributions from contingent
elements now show more reasonable values.
Bug
Fixes
- Oneline Diagrams: Fixed a potential
error when reading very old diagrams (Version
6.0a and earlier) which would result in the
diagram not reading in correctly.
- Case Information Displays: Fixed bug
that would not allow field to field comparisons
with string type fields. For the comparison
value, the field name was being compared rather
than the value of the field
- Contingency Analysis: Fixed bug with
the reporting of dV/dQ sensitivity violations
with the contingency analysis. It was possible
that violations were incorrectly being reported
as not active because the multiplier was applied
to the current contingency value rather than the
base case value.
- Optimal Power Flow: Immediately after
modifying an option on the OPF Options dialog,
if you then choose to save the options to a file
it did not reflect the change on the dialog.
This has been fixed.
Return to date list
New Features
- User Interface Dialogs: Added new
features to better show the branches that are
part of a multi-section line. There is now a
Branches tab on the Multi-Section Line
Information Dialog which shows a list of
individual branches. Also, when right-clicking
on a multi-section line oneline object (such as
on the Bus View) there are also menu options to
open the Bus View as well as specific dialogs.
- Case Information Displays: Modified
so that for bus records, the substation number,
name, and ID are now enterable in Run Mode.
Bug
Fixes
- Case Information Displays: In the
switched shunt records, the column headings for
the Switched shunt blocks and Number of steps
were incorrect. This has been fixed.
- PV and QV Curve (PVQV) Tool: When
choosing to save the QV Curve options to an
Auxiliary file, the quantities to track were not
being included in the AUX file. This will now be
included.
- Contingency Analysis: When using the
contingency Action for changing the series
capacitor reactance, the intended action was not
being taken properly. This has been fixed.
Return to date list
New Features
Bug
Fixes
- Bus View and Sub View: Related to the
new feature from December 1, 2006, which allows
you to use up/down arrows to toggle through
buses in the Bus View, a minor error was
introduced which resulted in you advancing to
the first bus as soon as you started typing in
the bus edit box. This has been fixed.
Return to date list
New Features
Bug
Fixes
- Fault Analysis: Fixed bug in
displaying the flow arrow "direction" of the
fault current on a transmission line. The
direction is really determined by the "real
power" flow direction and was not being shown
correctly for lines with negative series
reactances. Fault currents were still
correct and this only effected the oneline
display.
- Oneline Displays: Modified the way in
which document link oneline objects make calls
to Windows to open the associated file.
This should work better.
Return to date list
New Features
Bug
Fixes
- File Formats: The extra fields at the
end of the generator records in the EPC file (gov_flag,
agc_flag, dispatch_flag, baseload_flag) were not
being stored in the PWB file. This has been
fixed.
- Contingency Analysis: The check box
option to save the contingency analysis
definitions/results in the case PWB file was not
being properly managed on the contingency form.
This has been fixed.
- Contingency Analysis: Fixed a
potential divide-by-zero error which could occur
during linearized contingency calculations if
using Area Participation factors for the make-up
power.
- Available Transfer Capability: Fixed
a potential divide-by-zero error which could
occur during linearized contingency calculations
if using Area Participation factors for the
make-up power.
- PV and QV Curve: The area interchange
status was not always being correctly reset
after a PV Curve run. This has been fixed.
- PV and QV Curve: The display of the
Gen MW value at the Source and Sink on the PV
Results tab has been fixed.
Return to date list
New Features
Bug
Fixes
- Case Information Displays: On the
case information plots, added support for
windows locale settings.
- Power Flow Solution: Added better
support multi-terminal DC lines as their
converters hit current limits. Previously for
converters on power mode, the hitting of current
limits was not always handled properly resulting
in limitations occuring sooner than necessary
- Power Flow Solution: Added a new
message log entries describing what occurs as
limits of multi-terminal DC line converters are
encounters.
- Available Transfer Capability: Fixed
bug that prevented using the iterated methods on
injection groups that contained only load.
- Available Transfer Capability: When
choosing the option, "Take me to the transfer
limit for scenario..." the resulting transfer
amount was not the correct amount following
individual iteration on the first limiting
element. This has been fixed. This was only true
when using one of the iterated methods.
Return to date list
New Features
- Auxiliary Files: Modified the
TransferLimiter records so that specific types
of transfer limits can be created such as
TransferLimitBranch and TransferLimiterInterface
records.
- Power Flow Solution: For DC line
records and Multi-Terminal DC line records, the
metered end of the line could not be changed.
This has been modified so that the user may
change this setting.
Bug
Fixes
- Case Information Displays: Eliminated
several fields for injection groups that started
with the phrase "Sum Of". These fields should
not have been visible and always return zero.
Other fields are available that show the correct
values. For instance, there is a colum "Gen MW
Total" that returns a valid sum, while "Sum of
Gen MW" was an invalid field and always returned
zero.
- User Interface Dialogs: Fixed an
error which could occur when maximizing a
dialog. The dialog sometimes appeared as too
large a size and not quite maximized.
- PV and QV Curves: In the QV tool,
when a contingency solution can not be achieved
Simulator will attempt to add the generator at
the bus to the pre-contingency solution and then
attempt to resolve the contingency. An error
would occur however if an unsolvable contingency
solution also resulted in the bus in question
being completely disconnected from the rest of
the system. This has been fixed..
Return to date list
New Features
- Auxiliary Files: Modified the Bus
field for OPF: Marg MW Cost so that entering a
string that starts with the letter "N" or "n"
will reset the marginal cost values back to "Not
Valid".
- Auxiliary Files: Added a new
optional parameter to the SaveData() script
command. After the filter is specified, you may
now include inside a set of brackets a list of
variable names specifying the sort order. The
format of the values inside the brackets is
[variablename1:+:0, variablename2:-:1]. The
order of the variable names signifies the
priority of the sort. The parameter for +
signifies ascending order, - signifies
descending. The last parameter is a 0 or 1. 1
means absolute value for numbers and case
sensitive for strings. The last parameter is
optional and is set to 0 by default. The
variable name may also have a colon to indicate
the field location integer such as in LineMW:1
used to indicate the MW flow at the to end of a
branch. The full format of the script is
SaveData("filename",filetype,objecttype,[fieldlist],[subdatalist],filter,[SortFieldList]);
Filter and SortFieldList are both optional.
- Case Information: Modified the Bus
field for OPF: Marg MW Cost so that entering a
string that starts with the letter "N" or "n"
will reset the marginal cost values back to "Not
Valid".
Bug
Fixes
- General: Added the Quick AUX
drop-down menu next to the Script Mode button
back in.
- General: Accessing a PowerWorld
session from a remote desktop after starting it
locally (or vice-versa) now works properly.
Previously an access violation could occur.
- Contingency Analysis: Fixed a strange
error that could occur in contingency analysis,
if a contingency resulted in the disconnection
of a bus that had a continuous switched shunt
which was acting as a PV Bus. Subsequent power
flow solutions would not correctly back such a
switched shunt off a limit.
Return to date list
New Features
- Sensitivity Tools: Added a new
check-box option "Do not monitor lines that are
open" to the Multiple Element LODF calculation.
Bug
Fixes
- Available Transfer Capability: Added
a minor change to restoring the reference state
of generators in the ATC tool. This was needed
so that the Automatic Generation Control
routines would not introduce a small
inconsistency when running the same ATC study
using Iterated Solution Methods twice in
succession. Previously the two ATC runs would
show small differences. This will not occur
anymore.
- Available Transfer Capability: As
part of the ATC results, ATC Extra Monitors
store a lookup table of the flow on them at the
various transfer levels investigated by the ATC
tool. This lookup table was not being properly
cleared when a new ATC solution was run (except
for multiple scenario studies where it was
handled properly). This has been fixed so that
the lookup tables are properly cleared at the
beginning of all solutions.
- Power Flow Solution: As part of fix
from January 30, we inadvertently add the
enforcement of current ratings that are zero.
This has been fixed so that current ratings of
zero are ignored.
Return to date list
New Features
- File Formats: When reading in RAW
files, if a generator has a RMPCT value of zero,
it is now converted to a value of 100.
- Auxiliary Files: Added the ability to
store an "advanced sort" description as part of
the the AUX file description of the DataGrid
objects.
- Auxiliary Files: Added new optional
parameter "ApplyTransfer" to the
ATCDetermineATCFor(RL, G, I, ApplyTransfer)
script command. If this value is YES, then after
determining the transfer limit for the scenario,
the system state will be left at this transfer
level. (Note: when using the full contingency
solution method, the final state returned will
still be the pre-contingency state)
- Auxiliary Files: Added a new optional
script command SaveDataWithExtra(). This is
similar to the SaveData() command except that
the filetype can only be CSV or CSVNOHEADER.
Also, after the SortFieldList is specified, this
script command allows you to include inside a
set of brackets a list [header_list], and then a
second list inside a set of brackets [header_value_list].
SaveDataWithExtra(“filename”,filetype,objecttype,[fieldlist],[subdatalist],filter,[sortfieldList],[header_list],[header_value_list]);
The header_list is a comma-delimited list of
strings representing additional headers to list
with the data. These strings must be non-blank.
The header_value_list is a comma-delimited list
of strings representing the values to list with
the additional headers. If specified, there must
be as many values specified as there are
headers. If not specified, all are assumed to be
blank.
The filter, [sortfieldlist], [header_list], and
[header_value_list] are optional. However, if
omitting the [header_list] and [header_value_list]
then it is recommended that you just use the
SaveData command.
- Available Transfer Capability: Added
new optional parameter "ApplyTransfer" to the
ATCDetermineATCFor(RL, G, I, ApplyTransfer)
script command. If this value is YES, then after
determining the transfer limit for the scenario,
the system state will be left at this transfer
level. (Note: when using the full contingency
solution method, the final state returned will
still be the pre-contingency state)
Bug
Fixes
- Case Information: The values
displayed for the MW and MVar throughflow for an
area, zone, or substation were not properly
including the generation. This has been fixed.
- Auxiliary Files: Fixed bug where the
NumBridges field was not being properly read
from an auxiliary file.
- Oneline Display Options: Fixed error
in the renumber buses feature.
- Oneline Display Options: When
auto-inserting lines, gens, shunts and loads
simultaneously, the circuit breaker and pie
chart sizes were being rounded to an integer
size. This has been fixed so that floating point
number sizes can be used.
Return to date list
New Features
- Oneline Diagrams: Removed the
restriction that substation, area, zone and
super area oneline objects must be wider than
they are tall.
Bug
Fixes
- General: Fixed a bug that would only
occur if you were adding a three-winding
transformer as the FIRST branch element in an
empty case.
- Available Transfer Capability:
Choosing to Ramp Transfer on the Analysis tab of
the ATC Dialog, if you were using injection
groups as the seller and buyer, an access
violation would occur. This has been fixed.
- Available Transfer Capability: In
Multi-Scenario ATC Analayis, on the Results tab,
When clicking the button Write to Excel or Save
to Text Files, a confirmation dialog would
appear regarding the sorting of Transfer
Limiters. This dialog was not necessary anymore
and has been removed.
Return to date list
New Features
Bug
Fixes
-
Oneline Diagrams:
Fixed an access violation that occurred when
loading a oneline that contained groupings of
display objects that were empty.
-
Oneline Diagrams:
Fixed an access violation that occurred when
loading an auxiliary file through the oneline
link object that changed into Run Mode.
Return to date list
New Features
- User Interface Dialogs: Added the
display of custom floats and strings on the
Generator Dialog boxes.
Bug
Fixes
-
Auxiliary File
Script: Fixed an access violation that
occurred when a oneline diagrams was open and
the script command MergeBuses was uses.
Some of the oneline objects became incorrectly
linked resulting in access violations.
-
Case Information
Displays: When saving the list of Advanced
Filters to the auxiliary file from the Filters
case information display, you always saved ALL
filters. This has been fixed so that only
selected filters are saved.
Return to date list
New Features
- Auxiliary Files: Added support for
calling specific sub-types of PartPoints via
script commands. This includes PartPointGen,
PartPointLoad, PartPointShunt, and
PartPointInjectionGroup. By referencing the
subtype, the variablenames of the related object
can also be called. In this way you can refer to
the "GenStatus" of a the "PartPointGen" directly
allowing you to retrieve as well as modified Gen
fields directly via the PartPointGen objecttype.
- Auxiliary Files: Added support for
calling specific sub-types of InterfaceElements
via script commands. This includes
InterfaceElementBranch,
InterfaceElementBranchOpen,
InterfaceElementBranchClose,
InterfaceElementDCLine, InterfaceElementGen,
InterfaceElementLoad,
InterfaceElementInjectionGroup,
InterfaceElementMSLine,
InterfaceElementInterface. Allows same abilities
as for PartPoint sub-types.
- Auxiliary Files: Modified the Export
Case Object Fields feature to not export
repetitive lists of fields. For instance
PartPointGen only says it has the combination of
the Gen and PartPoint fields.
- Contingency Analysis: Modified the
Text file Contingency Report Writer so that it
also writes out the load islanded by each
contingency.
Bug
Fixes
-
File Formats:
Fixed an error that could occur when reading
Version 26 RAW files resulting in the branch
records being read incorrectly if blanks were
entered for the branch tap and angle.
-
Power Flow Solution:
Fixed the calculation of the tie-line flows
for multi-terminal DC transmission lines.
Previously, the tie-line flow could only be
handle across the entire multi-terminal record.
This has been changed so that individual
converters and DC lines are treated as the tie
line.
-
Optimal Power Flow:
When using the OPF to minimize system costs,
Simulator does not allow generators with Cost
Models of "None" to be dispatched. However when
using the objective function of minimum control
change, the requirement that Cost Models must
exist was still being enforced. This has been
fixed so that when using minimum control change
cost models are not required.
-
Optimal Power Flow:
The treatment with Super Areas of the Cost
of Energy and Losses Reference was not behaving
correctly and did not allow the user to modify
the value away from the default value. This has
been fixed.
-
Sensitivity
Calculations: Due to fix for bug on October
11, 2006, the ability to monitor the flow on
Branch A for the closure of Branch A was not
working properly. This is an unusually
interface, but is now handled properly.
-
Time Step Simulation:
When reading in a pre time-step script
command for each time point, Simulator read this
in BEFORE it made all the other user-defined
input changes. In some situations the user may
want to read this in AFTER the other
user-defined input changes. This has now been
made an option.
Return to date list
New Features
- Auxiliary Files: For the OpenCase and
SaveCase script commands, the ability to save
and open a case as an AUX file has been added.
- Auxiliary Files: Added the ability to
delete Area, InterfaceElement, PartPoint, and
ContingencyElement objecttypes using the
Delete(objecttype) script command.
- Oneline Diagrams: When applying a
contour to the oneline diagram, only buses,
substations, etc... that were visible would
effect the contour. Thus if objects were hidden
due to layers or the Oneline Display Detail the
contour would not reflect these objects. A new
option has been added that makes this optional.
Bug
Fixes
-
Oneline Diagrams:
For out of service branches set to show MW and
Mvar arrows with the option to not scale arrow
size set, Mvar flow arrows would still appear.
This has been fixed.
-
Oneline Diagrams:
Fixed bug ocurring when relinking loads and
generators on the Edit Mode dialog. The ID was
not properly set, so in the end, the objects
were not being relinked.
Return to date list
New Features
Bug
Fixes
Return to date list
New Features
Bug
Fixes
Return to date list
New Features
- User Interface Dialogs: Added a new
feature to Determine the Patch Distance from a
Bus to all other buses in the system. Option is
found under the tool menu.
- Oneline Diagrams: When auto-inserting
new substations, the fields defined in the
Default Drawing Values are not automatically
added.
- Oneline Diagrams: When automatically
adding fields around a transmission line, the
fields now obey the font size setting specified
with different voltage levels in the Default
Drawing Values.
- Contingency Analysis: Previously,
When running the ATC tool and using the iterated
ATC methods, the flows on interfaces which had
contingent elements were not automatically
updated at each power flow solution. This has
been changed so that they now are automatically
updated.
Bug
Fixes
Return to date list
New Features
Bug
Fixes
Return to date list
New Features
Bug
Fixes
Return to date list
New Features
Bug
Fixes
-
User Interface
Dialogs: When opening the switched shunt
dialog in Edit Mode, if the shunt was presently
OPEN, then after closing the dialog the Nominal
B value of the switched shunt was changed to
zero. This has been fixed so that we just leave
the nominal value at its present value.
-
Power Flow Solution:
Added a check during the switched shunt
routines to prevent a switched shunt from
operating if the voltage gets to low.
-
Available Transfer
Capability: When modeling a contingency
using a linearized method, Simulator must
determine which nodes will be outaged by the
contingency and model them as the loss of power
injection. During the iterated solution methods,
a flag was not being properly reset which could
result in an error during the ATC solution. This
has been fixed.
-
PV and QV Curve Tool:
When performing graphical plots in the PV
curve tool, the x-axis values were always being
sorted resulting some incorrect plotting near
the nose of the PV curve tool. This has been
fixed.Power Flow Solution: Added a check during
the switched shunt routines to prevent a
switched shunt from operating if the voltage
gets to low.
Return to date list
New Features
- Auxiliary Files: Fixed several
auxiliary file script commands that reference a
filename so that they correctly interpret
directory paths that are relative to the current
directory
- Auxiliary Files: Added new Script
command CalculateTLRMultipleElement().
First parameter is either BRANCH, INTERFACE, or
BOTH. Second pararmeter is either
SELECTED, OVERLOAD, or CTGOVERLOAD. Third
parameter is either BUYER or SELLER.
Fourth parameter is the transaction (see the
help for CalculateTLR script command).
First parameter is either AC, DC or DCPS.
CalculateTLRMultipleElement(TypeElement,
WhichElement, direction, [transactor],
LinearMethod);
- Power Flow Solution: Under rare
circumstances it's possible for a transformer
controlling it's FROM bus to have a negative
voltage to tap sensitivity. It doesn't make
sense for the transformer to attempt to change
its tap in this situation, therefore Simulator
will not anymore.
- Sensitivity Tools: Modified the WTLR
calculation so that it doesn't always compare
contingency overloads to 100 percent.
Bug
Fixes
Return to date list
New Features
- Available Transfer Capability:
Modifications made on October 11, 2006 more
properly handled situations when the buyer or
seller ran out of injection during the iterated
ATC methods. When this occurred the ATC process
was aborted and an appropriate limiter was
reported. It also aborted when processing the "X
Number of Limiters to Iterate On". A change has
been so that if a reserve limitation is hit
while processing an individual limiter, the
remaining "Top X" Limiters will still be
processed.
Bug
Fixes
-
Optimal Power Flow:
When specifying a Specific Bus as the Cost
of Energy, Losses, and Congestion Reference for
an Area or Super Area, the setting was not being
properly saved to the PWB file format. This has
been fixed.
Return to date list
New Features
- Auxiliary Files: Modified the storage
of interfaces inside Simulator to accommodate a
very large number of interfaces. As previously
designed if more than about 1000 interfaces were
created, many routines became very slow.
Interfaces are now stored in sorted order to
allow fast lookups.
Bug
Fixes
-
File Formats:
When opening a oneline diagram from the bottom
of the File menu where a list of recently opened
cases is shown, after completing the load of the
RAW file, a blank oneline diagram was often
opened and an extraneous error message appeared.
This has been fixed.
-
Contingency Analysis:
While running contingency analysis,
Simulator keeps track of a "What Actually
Occurred" string to describe what each
contingency actually did. There was an error in
this test description when bypassing or placing
inservice series capacitors. The actually
contingency action was correct, on the reported
text has been fixed.
-
Contingency Analysis:
When running the linearized lossless DC
contingency analysis method, it was possible in
some situations for the direction of the
violation to be shown incorrectly. This
magnitude of the violation was still correct,
only the direction was reported wrong. This has
been fixed.
-
Fault Analysis:
When running the fault analysis on a system with
a large number of mutual impedances, the
solution was unnecessarily slow. This has been
fixed to speed up the calculation greatly for
systems with a large number of mutual
impedances.
Return to date list
New Features
- Auxiliary Files: Modified features
throughout Simulator to allow writing data to an
auxiliary file using the object labels. This
most often affects the SUBDATA sections for
objects such as interfaces, injection groups, or
contingency records.
- Case Information Displays: Modified
the All Labels column to allow blank entries
which signify that the labels should be deleted
Bug
Fixes
-
Available Transfer
Capability: Changed the method used to bound
the stepsize during the iterated ATC methods.
Now, if the stepsize is greater than 70% of the
maximum allowed stepsize at that step, the
stepsize will be reduced to 70% of the maximum
allowed stepsize. The previous check would
reduce the stepsize to 70% of the maximum
allowed stepsize only if the stepsize was
greater than the maximum allowed stepsize.
-
Fault Analysis:
When writing out, to a PTI sequence file, a
negative sequence generator impedance that is
specified as zero we now write out the same
value as the positive sequence impedance.
-
Fault Analysis:
Fixed bugs in fault calculations. Taps were not
correctly included in zero sequence. Phase shift
was applied to zero sequence and was not
supposed to be. Negative sequence generator
impedance was incorrectly applied if the user
entered zero for the values. Generator sequence
currents were incorrectly calculated for the
zero sequence if the zero sequence impedance
given was zero.
Return to date list
New Features
- User Interface Dialogs: PowerWorld
has seen strange cases with bus shunt values of
+10,000 MW next to another bus with a -10,000 MW
shunt. These strange shunts can now be
automatically merged using a new feature on the
Equivalencing Dialog which goes through the case
and merges bus shunts that are across
zero-impedance branches.
Bug
Fixes
-
File Formats:
Fixed rare bug that would occur when unlinked
model conditions were read from the PWB file.
Bug was introduced due to interaction with new
feature added May 29 regarding labels.
-
Auxiliary Files:
Fixed bug with viewing oneline diagrams or the
Bus View after using the "MOVE" script command
-
SimAuto: Fixed
bug preventing the multiple direction PTDF grids
from being extracted or sent to Excel using
SimAuto
Return to date list
New Features
- File Formats: Added user prompt when saving the Limit Monitoring Settings from the Limit Monitoring Settings dialog to determine whether to use primary or secondary key fields or labels for identifying elements.
Bug
Fixes
-
File Formats:
Fixed bug when using interfaces that contained leading or trailing blanks. These interfaces could not be properly identified when they were contained in other elements such as Model Conditions.
-
File Formats:
When saving the Limit Monitoring Settings to an auxiliary file from the Limit Monitoring Settings dialog, the .AUX extension is now automatically added to the file name if an extension is not included.
-
Contingency Analysis: Additional fix to the linearized lossless DC contingency analysis method that had been fixed in the May 17, 2007, patch. The direction of the violation is now shown correctly for all possible post-contingency flow options.
-
Oneline Diagrams: When switching to the 3D View, the color of Text Objects would always be black no matter what color was selected in the 2D View. The correct color is now used when switching to the 3D View.
-
Oneline Diagrams: Generic Model Fields are now available in the 3D View. Previously, if a Generic Model Field was added in the 2D View, it would not be displayed when switching to the 3D View.
Return to date list
New Features
- Auxiliary Files: Added new script
command DeleteIncludingContents(*). Use
this to delete objects of a particular type and
other objects that these contain. Currently,
only multi-section lines can be used with this
command. The branches that belong to
multi-section lines will also be deleted along
with the multi-section lines. The
intention is to make this script command
available for Injection Groups and Interfaces as
well. A filter may optionally be specified
to only delete objects that meet a filter.
DeleteIncludingContents(objecttype, filter);
objecttype: The objecttype being selected.
filter: There are four options for the filter:
Delete(objecttype);: No filter specified means to delete all
objects of this type.
Delete(objecttype, "filtername");: "filtername" means delete
those that meet the filter.
Delete(objecttype, AREAZONE);: AREAZONE means delete those
that meet the area/zone filters.
Delete(objecttype, SELECTED);: SELECTED means delete those
whose selected field = YES.
Bug
Fixes
-
Contingency Analysis:
In the fix for May 17, 2007, the "What Actually
Occurred" string for bypassing or placing
inservice series cap was now flipped. This has
been fixed completely now.
-
Auxiliary Files:
Fixed error when reading the Interface Monitor
Direction from an AUX file. It was always
being read as FROM->TO even if the AUX file
specified it as TO->FROM.
Return to date list
New Features
- File Formats: Added more error
checking to prevent the reading of bad
transformer tap values
- Auxiliary Files: Modified the
DeleteIncludingContents() for multi-section
lines so that the dummy intermediate buses are
also deleted.
Bug
Fixes
-
Auxiliary Files:
Fixed bug with writing out variable names to
auxiliary files and choosing to use secondary
keys. Previously, the code was not included to
write out the variable names using secondary
keys.
-
User Interface
Dialogs: In the transmission line tap
dialog, the old 8 character bus name limitation
was still being enforced. This has been removed.
-
Available Transfer
Capability: Fixed infinite loop that could
be encountered when using the full contingency
method and ramping pre-contingency if a reserve
limit is found during the process of determining
the next step size when the contingency is
actually being implemented.
Return to date list
New Features
- Change to Retriever only.
Bug
Fixes
Return to date list
New Features
- Auxiliary Files: Added new script
command DeterminePathDistance([start],
BranchDistanceMeasure, BranchFilter, BusField).
The first parameter is an the starting place
which is enclosed in brackets. The starting
place may be either an Area, Zone, SuperArea,
SUbstation, Injection Group, or Bus. The second
parameter is either X, Z, Length, Nodes, or a
variable name for a branch. X means use the
series reactance, Z means use sqrt(X^2 + R^2),
Length means us the Length field, and Nodes
means treat each branch as a length of one.
Otherwise use any Branch object variable name.
The third parameter is either All, Selected,
Closed or the name of a branch Advanced Filter.
This parameter is used to specify which branch
can be tr
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