Ask Your Question
0

Minimum Three-Phase Fault Admittance

asked 2019-03-14 21:32:47 -0500

ffl gravatar image

I am looking into POM and PAGV2 documentation from PSS/E that states a minimum three-phase fault admittance that can still be applied.

This question was brought out because a certain utility requires that during fault, the solution must still converge. I am working on disturbance simulation for simple system with Solar PV Plant under study.

Would appreciate to know if there's such statement from the manuals or any valid reference.

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted
0

answered 2019-03-15 11:10:54 -0500

jconto gravatar image

The test of a three-phase fault at a bus implies the concept of bringing the bus to ground, with a zero impedance (infinite admittance) but from a computer coding limitation, a large admittance value is used to simulate this type of test.

The restriction that during fault, the solution must still converge is not valid during the fault period when voltage is zero (or even of small value). Post-fault conditions (recovery of voltage) will allow the load flow to converged again.

You can contact directly PTI about this question.

edit flag offensive delete link more

Comments

Agree. Faults are treated in PSDS as a 'mathematical discontinuity' which cannot be handled well by using explicit numerical integration techniques.

ffl gravatar imageffl ( 2019-03-21 08:55:20 -0500 )edit

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: 2019-03-14 21:32:47 -0500

Seen: 67 times

Last updated: Mar 15