Fast valving initiation

answered 2018-10-10 12:11:38 -0500

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VAR(L+1) specifies the time for initiating fast valving.

At initialisation of simulation VAR(L+1) is set to 9999 by PSSE. Change the value to the wanted time for start of fast valving. For example 1.3 if you want to initiate at time=1.3 s.

In a script use API:

psspy.change_plmod_var(ibus, id, ’TGOV2’, 2, 1.3)

After that you just run the simulation.

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Thank you for the reply. Can you elaborate what is called by VAR(L+1)

kjlakmewan ( 2018-10-11 01:38:50 -0500 )edit

Model TGOV2 uses two VARS, see the datasheet for the model. The VAR controls at what time the fast valving shall be initiated.

perolofl ( 2018-10-11 02:45:22 -0500 )edit

Now it is successfully triggered for given time in API. Now i want to trigger this fast valving for a given frequency value. Is it possible??

kjlakmewan ( 2018-10-13 07:38:57 -0500 )edit

Yes it is. Write a User model that trigs the VAR when the frequency reaches the given value.

perolofl ( 2018-10-13 12:37:38 -0500 )edit

I have two more thing to clarify, 1. Once FV is activated when frequency exceed a certain value, is there a way to deactivate FV when frequency decrease.

kjlakmewan ( 2018-10-20 21:02:50 -0500 )edit

2. just think a moment FV is activated and IV valves are in FV action (Following predetermined Timing), Now frequency go bellow set frequency. Will IVs fast opened aborting following predetermined Timing.

kjlakmewan ( 2018-10-20 21:07:37 -0500 )edit

Fast valving in TGOV2 follows the scheme defined by Ta, Tb and Tc. Maybe it is possible to affect the scheme by changing the parameters during the simulation.

perolofl ( 2018-10-21 15:47:21 -0500 )edit

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