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。
4 |7 _& g9 z+ Y4 y+ P% NTo prevent islanding, a DR unit operating in parallel with the Area EPS should disconnect from the* `2 s; i0 E5 h2 w. [$ ]
system within 2 seconds of sensing a voltage sag or discontinuity of service on Area EPS side of the PCC.- ~& K5 }. u8 w0 W6 h
This is typically fast enough to allow disconnection prior to the shortest reclosing times found in
) X+ M W6 d' r7 Iprotective relays on the Area EPS. It should also prevent reclosure into an out of phase DR unit, as well V1 d* |' H5 ` B2 Q: z$ t( z) J
as allow the fault arc to deionize prior to reclosure. Once a DR unit has disconnected from the Area EPS,
/ b Q& C" Q* t+ y/ cit should not reconnect into a de-energized system |
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