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How long is the length of the time window in the model named DLSHBL?

asked 2025-02-19 05:46:48 -0600

bruchen
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I am running the rocof model named DLSHBL. The formula of rocof is (f2-f1)/(t2-t1) ,or it can be shown as (delta f / delta t) . However, I do not know how long is the length of the delta t. Thanks for all your help. P.S. my solution parameters : Iterations=25 Acceleration=0.5 Tolerance=0.01 DELT=0.0002

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answered 2025-02-19 22:25:20 -0600

flag of Pakistan

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updated 2025-02-19 22:26:47 -0600

PSS/E calculates RoCoF as (f2-f1)/(t2-t1) and then passes it through a low pass filter with a time constant of 0.04 (default).

Here t2-t1 is actually DELT. So, in your case, t2-t1 = 0.0002.

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I understand your point. Thank you very much.

bruchen ( 2025-02-20 00:27:53 -0600 )edit

The frequency filter time constant is shown in "Dynamic Solution Parameters".

perolofl ( 2025-02-20 07:56:06 -0600 )edit

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Asked: 2025-02-19 05:46:48 -0600

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Last updated: Feb 19

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