TA的每日心情 | 开心 2017-2-26 11:53 |
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签到天数: 7 天 连续签到: 1 天 [LV.3]偶尔看看II 累计签到:7 天 连续签到:1 天
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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。
& h8 a2 L" F _To prevent islanding, a DR unit operating in parallel with the Area EPS should disconnect from the$ e( V( c/ @9 L
system within 2 seconds of sensing a voltage sag or discontinuity of service on Area EPS side of the PCC.
$ ~" e6 {' E' _! e2 G5 N# b' mThis is typically fast enough to allow disconnection prior to the shortest reclosing times found in
; R/ g- O4 A& x; ]protective relays on the Area EPS. It should also prevent reclosure into an out of phase DR unit, as well
( D/ r8 f- k, _5 V$ q; T, j5 P: {as allow the fault arc to deionize prior to reclosure. Once a DR unit has disconnected from the Area EPS, ^0 {+ b5 R2 V7 [# Q# o, Z
it should not reconnect into a de-energized system |
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