不对称三相电路无功电能的测量误差分析  

To analyze the reactive power measure error of non-balance three-phase circuit with balance-phasor method

作　　者：杨文平 贾权[2] 

机构地区：[1]同煤集团四台矿运销站,大同037003 [2]山西大同大学煤炭工程学院,大同037003

出　　处：《仪器仪表用户》2012年第2期79-82,共4页Instrumentation

摘　　要：由于实行了按功率因素调整电价制度,就必须正确的测量出负载的平均功率因素。在不对称的三相电路内,欲把平均功率因素测量正确,就必须准确地测出负载的无功电能。而在线电压及线电流不对称的情形下,无功电能的测量会产生误差。本文用对称分量法对此问题作了详细的分析和讨论。Owing to charging for electricity according as how much the Power Factor is, so the average power factor should be measured accurately as much as one can do. In the non-balance three-phase circuit, the reactive power of load has to be measured accurately if the average power factor is expected to be of preciseness. But in the condition of non-balance line voltage and non-balance line current in a circuit, the measure error of reactive power is produced inevi- tably. In this article,the above problem has been analyzed and probed particularly with Balance-phasor Method.

关 键 词：对称分量法 不对称电路 无功电能表 测量误差 

分 类 号：TM933.4[电气工程—电力电子与电力传动]