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。
6 e9 t) c |7 s# d# {/ D* t1 L2 w3 vTo prevent islanding, a DR unit operating in parallel with the Area EPS should disconnect from the. e1 s. V: r+ T+ y* M
system within 2 seconds of sensing a voltage sag or discontinuity of service on Area EPS side of the PCC.- |+ @, N* r9 A' O. Q$ N/ l
This is typically fast enough to allow disconnection prior to the shortest reclosing times found in& {+ l& P6 r v; [
protective relays on the Area EPS. It should also prevent reclosure into an out of phase DR unit, as well& G1 T! l' o8 a+ k5 L# \7 _% }
as allow the fault arc to deionize prior to reclosure. Once a DR unit has disconnected from the Area EPS,
& s5 k3 @) H0 X, Wit should not reconnect into a de-energized system |
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