电力系统振荡时，（   ）可能会发生误动。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69518' and id < 4503721 and id<>'4503721' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69518' and id > 4503721 and id<>'4503721' order by id asc limit 5