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Three Area System with Line Overloads
This case has 3 control areas. Your operating area is the Home area
which contains buses 1 and 2. The simulation runs from 0:00 am to
23:59 pm. Your load varies during the simulation time. Each of your
generators is initially supplying 200 MW. One generator has a lower
operating cost. Without any control action, certain lines will
overload. Your goal is to get through the 24 hour simulation with
minimum cost while carefully monitoring and rectifying line overloads.
Run the simlation and watch the system go through one full day of
load and generation cycling. To monitor the average cost per MWH of
your control area, click on "Options" and then on
"Average cost per MWH." If you wish to know the incremental
cost of the individual generators, right-click on the generator
sysmbol and select "Incremental Cost Curve" from the
submenu. The generator cost characteristics may be obtained from the
"Information dialog.
You may monitor economic information by clicking on
"Options" and then on "Area Display." Left-click
on the name of your area to obtain information about your hourly costs
and the total simulation cost for your area.
You are now ready to begin the project. The generation in your area
may be increased in either of two ways:
- Dispatching more generation from the more expensive generator.
This is done simply by clicking on the up arrow of the MW field next
to the generator.
- Making power transactions with the other two areas. This is done
by opening the "Area Display" and clicking on
"Deal/Wheel". You can buy or sell power. You then must go to
a different area and click on "Deal/Wheel" and set them up
to buy or sell (the opposite of the other area) power. Note that,
because of the load variation, you have to be careful about the length
of time a particular transaction should take.
You will need to use a mixture of the two control strategies to
minimize cost without overloading lines. You need to run the
simulation several times with different strategies to come up with a
good solution. However, there is no unique solution.
In your analysis, report the control actions that you took (e.g.
the time at which the action was taken, why it was taken, the cost to
your area of the action). Note your total cost at the end of the
simulation.
Files to download
To explore this problem, click here to
save the necessary files to your system. Once they are on your system,
be sure to unzip them. The two files that will result are the system
description file, PROJECT.PWC, and the system one-line diagram,
PROJECT.PWD. When you open a simulation case in PowerWorld, choose
Project.pwc.
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