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。
1 G' h" s5 ^" S8 f) P4 dTo prevent islanding, a DR unit operating in parallel with the Area EPS should disconnect from the, U3 z0 c1 k [2 K; z+ k3 m
system within 2 seconds of sensing a voltage sag or discontinuity of service on Area EPS side of the PCC.) ~- U2 I. P8 ~! ~
This is typically fast enough to allow disconnection prior to the shortest reclosing times found in
% ]2 \9 m o1 n6 k* zprotective relays on the Area EPS. It should also prevent reclosure into an out of phase DR unit, as well
/ m# j4 D$ q9 ?5 m3 v8 X% @as allow the fault arc to deionize prior to reclosure. Once a DR unit has disconnected from the Area EPS,. s r' ~3 C& }
it should not reconnect into a de-energized system |
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