How to change spinning reserve and load level use python？

asked 2013-11-09 08:05:12 -0500

Bob
41 ●8 ●9 ●11

In PSS/E simulation, for example ,a New England 39-bus System , How to use a Python program to set up the system of different levels for spinning reserve, for example, 5%, 10%, 15%? and different load levels for example 100%, 95%, 90% and so on? and in the simulation , for example the spinning reserve level is 15% while the load level is 90% ,we use Python to finish the psse simulation and dynamic simulation, but what shall we do to ensure the system stability and power balance（use python）？

Thank you ！

answered 2013-11-18 23:49:13 -0500

jconto
2601 ●10 ●30 ●40

For the case when load is 100% and SR (spinning reserve) is, say 10%: [task A] Do a load flow, prepare case for dynamics and run a non-disturbance test to check that the system is stable. Choose a unit to trip and plot the frequency response of the system. Now repeat the gen trip run with less amount of SR by taking out of the dyr file the governor model of another unit to simulate lower SR % conditions. This way, power balance is retained while changing the SR amount. The unit to trip (choose always the same unit, with governor disabled) can be scaled down (with other unit being scale-up) to simulate system frequency response at different amount of MW loss, then do task A before tripping the unit. Now for the case when load is 95% (100-5) and SR is 15% (10 + 5): repeat all the test done previously. Chances are your system does not need task A anymore, because all the models will be initialized for a 'unloading' network condition. These studies require a lot of units to form the sub-group of units providing SR, another sub-group of units to be used during the scaling up, with governor disable, etc. I recommend you use at least the IEEE118 or larger network.

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@jconto "Now repeat the gen trip run with less amount of SR by taking out of the dyr file the governor model of another unit to simulate lower SR % conditions." in other words, in the 1st simulation (39bus-system),we use 10 governor models, and the 2nd simulation,we should use 9 governor models?

Bob ( 2013-11-19 00:25:16 -0500 )edit

Yes. Taking out a governor model reduces the available SR capable to respond to the frequency event.

jconto ( 2013-11-19 20:53:48 -0500 )edit

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How to change spinning reserve and load level use python？

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