Ask Your Question
0

Voltage Negative Sequence in dynamic studies

asked 2022-04-24 13:32:17 -0500

dvit gravatar image

Hello,

I have the understanding that under a dynamic simulation PSSE calculates the positive sequence matrix and performs and the generator is also represented in the positive sequence. This situation works great with balanced faults.

However, with unbalanced faults under a dynamic simulation PSSE does not permit to read the negative sequence voltage at the generator terminals until PSSe 34.7. Is this correctly understood?

Unfortunately, I am not able to find evidence in the manual of confirmation or denying of my question in the manual.

Thus, I would also to like to ask if anyone knows where this information is written in the manual? Thank you.

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted
0

answered 2022-05-05 19:54:05 -0500

GaryB gravatar image

The dynamic models are positive sequence only. It's possible to run unbalanced fault (at least SLG), but PSSE still only simulates the positive sequence. You cannot read negative sequence values because they aren't simulated.

I assume short-circuit analysis simulates negative and zero sequences. The detrimental effects of negative sequence happen during a fault. I would use short-circuit analysis and known breaker timings.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

[hide preview]

Question Tools

1 follower

Stats

Asked: 2022-04-24 13:32:17 -0500

Seen: 118 times

Last updated: May 05