如果同步发电机的中性点不接地，零序电流不能通过发电机，这时发电机的等值零序电抗为无限大。(  )

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69515' and id < 4503529 and id<>'4503529' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69515' and id > 4503529 and id<>'4503529' order by id asc limit 5