配电网无功补偿电容器损坏事故分析及抑制措施研究

为查找配电网无功补偿电容器的损坏原因,在对广西区内电容器补偿系统充分调研的基础上,建立了用于仿真计算的等值模型;通过仿真计算,研究合闸操作无功补偿电容器组产生的过电流、过电压及其影响因素,研究串联电抗对过电压、过电流以及系统谐波放大的影响;通过分析计算,研究系统谐波对无功补偿电容器组的影响;通过现场试验,测量系统无功补偿电容器组产生的过电压与过电流,提出能限制无功补偿电容器组产生过电压与过电流的措施。

Study about Cause and Countermeasure of Destruction Accident on Capacitors for Reactive Power Compensation in Distribution Network

In order to find the destruction cause of capacitors for reactive power compensation in power distribution network,the equivalent simulation model was established on the basis of sufficient investigation about capacitor compensation system in Guangxi;by simulation calculation,the following were studied: the overcurrent,overvoltage created by switching-on capacitors for reactive power compensation and their effects;influence of series reactance to the overcurrent,overvoltage and amplified harmonics in the power system;by calculation and analysis,the influence of harmonics in the system to the capacitors was studied;by field test and measurement of the vercurrent and overvoltage created by operated capacitors for reactive power compensation,measures to limit the overcurrent and overvoltage was obtained.