为解决系统无功电源容量不足的问题，提高功率因数，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='69460' and id < 4498481 and id<>'4498481' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id > 4498481 and id<>'4498481' order by id asc limit 5