TA的每日心情 | 开心 2017-2-26 11:53 |
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发表于 2011-12-6 14:53:57
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95页,Islanding 这一章就有讲到。7 x y/ i; L F _6 e; N$ d. W
To prevent islanding, a DR unit operating in parallel with the Area EPS should disconnect from the
8 {: i9 Y" b9 N5 \" g6 H2 ssystem within 2 seconds of sensing a voltage sag or discontinuity of service on Area EPS side of the PCC.
& y; r3 G9 `' ?This is typically fast enough to allow disconnection prior to the shortest reclosing times found in
- V. X9 u1 {: G" Iprotective relays on the Area EPS. It should also prevent reclosure into an out of phase DR unit, as well
* }, ?0 h" y/ ^" t+ b* b# g! @as allow the fault arc to deionize prior to reclosure. Once a DR unit has disconnected from the Area EPS,2 j e7 l' {. v1 a9 }
it should not reconnect into a de-energized system |
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