10kV并联电容器组的故障分析及应对措施

Fault Analysis and Reply Measure for 10kV Shunt Capacitor Bank

并联电容器无功补偿是电力系统中优先采用的无功补偿方式，可减少输电线路输送电流，起到减少线路能量损耗和压降，改善电能质量和提高设备利用率的重要作用。文章分析10kV并联电容器常见故障类型，即渗漏油、谐波损坏、电容器组群爆和电容器内有异常声音4个案例，对运行工况提出了严格要求，配置时要考虑各种原因引起的过电压、低电压、过电流等情况，并应根据电容器接线方式、采样装置接线方式及运行方式等条件全面考虑。

Reactive power compensation of shunt capacitor is the prior method adopted in reactive power compensation, with the reason that it can reduce the current delivered, so that the energy loss will be reduced and the line drop can be achieved. Thus, the quality of the electric energy can be improved, and the facilities can be better utilized. This paper deals with four cases of usual casualties of lOkV shunt capacitors -oil leakage, harmonic damage, explosion of capacitor bank, and abnormal sound within the electric condensers. The casualties of lOkV shunt capacitors are complicated, thus strict operating condition is demanded. Over tension, low voltage, over current caused by all kinds of reasons should be considered when the capacitor is allocated. Whatg more, there should be a thorough consideration of mode of connection of the electric condenser and the sample drawing device, as well as operating conditions.