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。
# E) ?) X" p) L7 J; nTo prevent islanding, a DR unit operating in parallel with the Area EPS should disconnect from the4 s3 S( m& F0 K0 e
system within 2 seconds of sensing a voltage sag or discontinuity of service on Area EPS side of the PCC.
+ I6 H3 R q- x1 ZThis is typically fast enough to allow disconnection prior to the shortest reclosing times found in5 a2 ~6 G; B* c- N
protective relays on the Area EPS. It should also prevent reclosure into an out of phase DR unit, as well( X+ l H/ K( B* X
as allow the fault arc to deionize prior to reclosure. Once a DR unit has disconnected from the Area EPS,
7 g: g- @8 G' I1 }it should not reconnect into a de-energized system |
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