基于直流侧无源电压谐波注入法的串联型24脉波整流器  

A Series-Connected 24-Pulse Rectifier with Passive Voltage Harmonic Injection Method at DC Side

作　　者：孟凡刚[1] 王琳 高蕾[1] 孙正鼐 杨世彦[1] Meng Fangang;Wang Lin;Gao Lei;Sun Zhengnai;Yang Shiyan(School of Electrical Engineering & Automation Harbin Institute of Technology,Harbin 150001 China)

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,哈尔滨150001

出　　处：《电工技术学报》2019年第6期1180-1188,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51777042);中国博士后科学基金(2016M590281;2017T100241)资助项目

摘　　要：为抑制串联型多脉波整流器的输入电流谐波,提出一种直流侧电压谐波注入法。该方法通过谐波注入电路产生6倍电网电压频率的电压谐波,并通过谐波注入变压器注入串联型多脉波整流器的直流侧,使整流器输入电流的波形近似为正弦;借助开关函数法,分析移相变压器输入电压24阶梯波的形成过程;从移相变压器输入电压总谐波畸变率(THD)值最小角度出发,设计注入变压器的最佳匝比。仿真和实验结果表明,使用谐波注入电路后,整流器的输入功率因数由97.43%提高到98.94%,电能质量得到明显提高;移相变压器的输入电压由12阶梯波变为24阶梯波,其THD值由9.74%降到3.34%,输入电流THD值由7.62%降到2.65%,整流器的谐波抑制性能得到显著提升。In order to suppress the input current harmonics of multi-pulse rectifier,this paper proposes a voltage harmonic injection method at DC side for series-connected 12-pulse rectifier.The proposed method uses harmonic injection circuit to generate voltage harmonic,which has six times the supply frequency,so that the waveform of the input current is approximately sinusoidal.With the help of the switching function method,the formation process of the 24 step wave input voltage of isolation transformer is analyzed.The optimum turn ratio of injection transformer is designed based on the lowest THD of the input voltage of isolation transformer.Simulation and experimental results show that,after using the harmonic injection circuit,the input power factor of the rectifier is increased from 97.43%to 98.94%,thus the power quality has been improved significantly,the input voltage of isolation transformer is changed from 12 step wave to 24 step wave,its THD drops from 9.74%to 3.34%,and the THD of input current drops from 7.62%to 2.65%,the harmonic suppression performance of the rectifier has been significantly improved.

关 键 词：串联型多脉波整流器 电流源型变换器 无源谐波抑制 注入变压器 恒压负载 

分 类 号：TM461.3[电气工程—电器]