下图为单相交交变频电路，当P组变流器处于逆变状态时，N组变流器处于（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32684' and id < 2599722 and id<>'2599722' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32684' and id > 2599722 and id<>'2599722' order by id asc limit 5