发电机过励磁时，向电网输送的无功功率是（   ）。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69324' and id < 4488040 and id<>'4488040' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69324' and id > 4488040 and id<>'4488040' order by id asc limit 5