PSSE dynamic simulation: how do I remove the first 1 cycles?

asked 2017-11-08 13:28:10 -0500

pjlau
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Hi,

I noticed that the simulation always started at t = -0.01667 second instead of t = 0, as a result of initialization. How do I make change using psspy in python to start the simulation at t = 0?

I tried to make change the settings in psspy.run, but it did not seem to work that way. psspy.run(1,tEnd,1,1,0)

Thank you,

answered 2017-11-08 15:38:58 -0500

perolofl

3262 ●1 ●8 ●18

PSSE is always initialising at minus two time steps. In your case at -0.01667 second. What is your reason to start at 0? You can plot the simulation starting at 0 and thereby hide the first two time steps.

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Because I would like to simulate in a time step = 0.0333 sec, in a fashion of t =0, 0.0333, 0.0666, 0.1,... Thank you,

pjlau ( 2017-11-08 15:45:26 -0500 )edit

If your time step is 0.0333 sec PSSE will initialise at -0.0667. The simulation time will be: -0.0667, -0.0333, 0, 0.0333, 0.0667, 0.1...I.e. exactly as you want!

perolofl ( 2017-11-08 15:57:32 -0500 )edit

Is it possible to set time step as such using psspy.run? Or other function? Thanks.

pjlau ( 2017-11-09 11:34:04 -0500 )edit

Use psspy.dynamics_solution_param_2(realar3=0.00333333333) to change the time step to 3.33333333 ms.

perolofl ( 2017-11-09 23:51:59 -0500 )edit

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PSSE dynamic simulation: how do I remove the first 1 cycles?

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