为解决系统无功电源容量不足、提高功率因索、改善电压质量、降低线损，可采用(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69497' and id < 4501933 and id<>'4501933' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69497' and id > 4501933 and id<>'4501933' order by id asc limit 5