电力谐波对电缆电流的影响特性及抑制策略研究  

Study on influence characteristics and suppression strategies of power harmonics on cable current

作　　者：姜东飞 张陵 赵普志 唐志国[3] Jiang Dongfei;Zhang Ling;Zhao Puzhi;Tang Zhiguo(Maintenance Company,State Grid Xinjiang Electric Power Corporation,Urumqi 830002,China;State Grid Xinjiang Electric Power Corporation,Urumqi 830002,China;Beijing Key Laboratory of High Voltage&Electromagnetic Compatibility,North China Electric Power University,Beijing 102206,China)

机构地区：[1]国网新疆电力公司检修公司,乌鲁木齐830002 [2]国网新疆电力有限公司,乌鲁木齐839000 [3]华北电力大学高电压与电磁兼容北京市重点实验室,北京102206

出　　处：《电测与仪表》2023年第3期59-64,共6页Electrical Measurement & Instrumentation

摘　　要：电力谐波作为电网环境污染的危害之一,会对电缆线路正常运行造成严重的危害,因此,研究电力电缆在谐波环境下的运行特性对降低谐波危害十分重要。文中基于电路理论建立了电缆等值阻抗模型,求解得到电缆输电线路谐波等值阻抗;基于阻抗分析法对电缆漏电容的谐波特性以及谐波环境下漏电容对谐波电流的放大作用进行定量计算,并基于MATLAB仿真软件进行验证。基于阻抗串并联特性分析并联电容器无功补偿作用下的谐波电流变化特性以及串联电抗器对谐波抑制的作用。该研究成果对电缆线路的谐波特性分析及抑制具有一定的指导作用。As one of the hazards of power grid environmental pollution,power harmonics will cause serious damage to the normal operation of cable lines.Therefore,it is great of significance to study the operating characteristics of power cables in harmonic environments to effectively suppress harmonic hazards.Based on circuit theory,the equivalent impedance model of cable is established,and the harmonic equivalent impedance of cable transmission line is obtained.The harmonic characteristics of cable leakage capacitance and the amplification effect of leakage capacitance on harmonic current under harmonic environment are calculated by impedance analysis method,and verified by MATLAB simulation software.Based on the series-parallel impedance characteristics,the harmonic current variation characteristics of the parallel capacitors under reactive power compensation and the suppression effect of series reactor on harmonics are investigated by mathematical calculation.The research results of this paper have a certain guiding role in the analysis and suppression of harmonic characteristics of cable lines.

关 键 词：谐波电流 阻抗模型 漏电容 谐波放大 

分 类 号：TM933[电气工程—电力电子与电力传动]