多馈入直流系统中逆变站滤波器投切对谐波电流的影响  

Impacts of Switching AC Filters of Inverter Stations on Harmonic Currents in Multi-infeed HVDC System

作　　者：郝巍[1] 李兴源[1] 金小明[2] 吴小辰[2] 颜泉[1] 

机构地区：[1]四川大学电气信息学院,四川省成都市610065 [2]中国南方电网技术研究中心,广东省广州市510620

出　　处：《电网技术》2006年第19期48-52,共5页Power System Technology

基　　金：国家自然科学基金项目(50595412);国家重点基础研究专项经费项目(2004CB217907);南方电网技术研究中心项目~~

摘　　要：基于大型电力系统分析软件NETOMAC,提出了机电暂态和电磁暂态混合时域仿真法。该方法主要研究南方电网2008年多馈入直流系统各个逆变站由于滤波器投切产生的谐波电流的交互影响。对时域仿真得到的谐波电流进行傅里叶变换,仿真和分析结果表明某逆变站退出或投入任意类型的一组交流滤波器会使逆变站流入交流母线的对应谐波电流增大或减小,多个换流站的不同类型滤波器进行组合投切时,不同逆变站之间由于电气距离较近所产生的谐波交互影响可能造成投切效果和预期不同、甚至相反。A hybrid time-domain simulation method integrating electromagnetic transient simulation and electromechanical transient simulation based on large power system analysis software NETOMAC is proposed. The interaction of harmonic currents caused by switching AC filters of inverter stations in the multi-infeed DC system of China Southern Power Grid in the year of 2008 is mainly researched. And the harmonic currents are analyzed by Fourier transform which are attained during the simulation process. Results of simulation and analysis show that when a set of disposable type of AC filters are switched off or on, the corresponding harmonic currents flowing into AC bus will increased or decreased; when different types of unitized AC filters in different converter stations are switched on or off, because of closer electrical distances the interaction of harmonics may cause that the switching result is different from prospective effect or even to the extent that the switching effect is opposite to the prospective one.

关 键 词：多馈入直流系统 投切滤波器 谐波交互影响 混合仿真 

分 类 号：TN714[电子电信—电路与系统] TM713.8[电气工程—电力系统及自动化]