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How to ramp the value of exciter output voltage in dynamic simulation?

asked 2018-10-20 17:47:47 -0500

Jota_1892 gravatar image

Hi, I'm new with PSSE. I am simulating the dynamic response of a synchronous machine (SMIB system) in PSSE.

I would like to know if it is possible to change the value of the exciter output voltage (Efd) according to a ramp with a defined slope (or alternatively with a defined duration) in a dynamic simulation? Sort of a "manual control" of the value of Efd.

Also, could you recommend a web page to start to learn to work with Python in PSSE. I am using the GUI to run the simulation.

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answered 2018-10-21 15:34:21 -0500

perolofl gravatar image

PSSE does not have any facility to ramp EFD. However it can be done with some code in the CONEC file or with a user-written model.

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thanks for the answer. How can I defined a user-written model for the exciter?

Jota_1892 gravatar imageJota_1892 ( 2018-10-21 19:08:06 -0500 )edit

Read Chapter Model Writing in Program Operation Manual!

perolofl gravatar imageperolofl ( 2018-10-21 23:49:44 -0500 )edit

User exciter models are pretty straightforward to write, in this case will just have to manipulate your efd in mode 3 as per your needs

txc gravatar imagetxc ( 2019-03-05 21:41:50 -0500 )edit
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answered 2019-03-05 04:12:25 -0500

jfconroy gravatar image

You can also implement the ramp in Python code, running one simulation step at a time in a while loop, changing the value of the ramp signal as you iterate. Not the most elegant solution, but effective nonetheless.

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How can we change the EFD in Python?

perolofl gravatar imageperolofl ( 2019-03-05 04:55:09 -0500 )edit

I was thinking about a ramp to the voltage setpoint. A ramp to the EFD would require a user model (either CONEC, CCT (v33+) or Exciter model).

jfconroy gravatar imagejfconroy ( 2019-03-05 05:46:01 -0500 )edit

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Asked: 2018-10-20 17:47:47 -0500

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Last updated: Mar 05