考虑电源谐波的无源补偿网络设计方法  

Passive Compensation Network Design Considering Background Harmonics of Power Supply

作　　者：路涛涛 田铭兴[1,2] 朱四维 滕青芳[1,2] LU Tao tao;TIAN Ming xing;ZHU Si wei;TENG Qing fang(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Rail Transit Electrical Automation Engineering Laboratory of Gansu Province,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,甘肃兰州730070 [2]兰州交通大学甘肃省轨道交通电气自动化工程实验室,甘肃兰州730070

出　　处：《兰州交通大学学报》2018年第4期51-56,共6页Journal of Lanzhou Jiaotong University

基　　金：国家自然科学基金(51367010);甘肃省科技计划项目(17JR5RA083);甘肃省自然科学基金(1610RJZA042);兰州交通大学优秀科研团队项目(201701)

摘　　要：目前三相负载不对称系统无源补偿的研究极少考虑电源背景谐波的影响,这与系统实际状态不符.在分析电源背景谐波对无源补偿效果的影响时发现,当电源含有谐波时,补偿网络的电容元件会放大电容支路的谐波电流,进而导致电源的电流畸变率远大于其电压畸变率.针对此问题,提出了一种考虑电源背景谐波的无源补偿网络设计方法,通过在电容支路串联电抗器实现补偿网络电容支路的参数修正,使电容支路在基波下表现为容性,在各次谐波下表现为感性,进而达到抑制电源电流谐波的放大,且不影响补偿性能指标.仿真和实验验证了无源补偿方法的正确性以及参数修正的有效性和可行性.Current studies on passive compensation of asymmetric three-phase load system rarely considers the influence of power background harmonics.Through the analysis of the influence of power source background harmonic on passive compensation,it was found that when the power contains harmonics,the capacitor element in the compensation network amplified the harmonic current of the capacitance branch,and the current distortion rate of the power supply was far greater than the voltage distortion rate;To solve the problem,apassive compensation network design method considering power background harmonics was proposed.In this method,the parameters of the capacitance branch of the compensation network were corrected by the capacitance branch series reactor,making the capacitance branch be capacitive under the fundamental wave,and inductive under various harmonics,so as to restrain the amplification of power supply current harmonics without affecting the performance of compensation.The correctness of the passive compensation method and the effectiveness and feasibility of parameter correction were verified through simulation and experiment.

关 键 词：三相负载不对称系统 无源补偿 谐波放大 参数修正 

分 类 号：TM761[电气工程—电力系统及自动化]