某电力系统发生下列哪种情况时，产生的过电压不属于操作过电压(  )。（0.5）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69421' and id < 4494880 and id<>'4494880' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69421' and id > 4494880 and id<>'4494880' order by id asc limit 5