摘要
对一起电容器损坏事故进行分析,认为谐波是电容器损坏的主要原因,通过建立模型、理论计算分析了3次、5次谐波对电容器运行的影响,指出系统非对称运行时3次谐波可能导致系统发生3次谐波谐振,无功补偿装置阻抗值配置不合理将会导致电容器发生损坏。通过理论计算,提出将电抗器电抗率由6%提高到15%的技术改进措施。
In this paper,a capacitor damage accident was analyzed.It was considered that harmonic was the main cause of capacitor damage.The influence of third and fifth harmonic on capacitor operation was analyzed through model establishment and theoretical calculation.It was pointed out that third harmonic may lead to third harmonic resonance and impedance value of reactive power compensation device in asymmetric operation of the system.The unreasonable configuration would lead to the damage of capacitors.Through theoretical calculation,the technical improvement measures to increase the reactance rate of reactor from 6%to 15%were put forward.
作者
汪飞
王伟伟
WANG Fei;WANG Weiwei(Changshu Power Supply Company,Changshu 215500,China)
出处
《电工技术》
2019年第23期98-100,共3页
Electric Engineering
关键词
并联电容器
谐振
谐波放大
shunt capacitor
resonance
harmonic amplification
