基于输入导纳模型的AC-DC变换器输出电流二倍工频纹波的抑制  

Suppression of Double-Line-Frequency Output Current Ripple of an AC-DC Converter Based on an Input Admittance Model

作　　者：姚占辉 许建平[1] YAO Zhanhui;XU Jianping(Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle Ministry of Education Schoolof Electrical Engineering Southwest Jiaotong University, Chengdu 611756, China)

机构地区：[1]磁浮技术与磁浮列车教育部重点实验室西南交通大学电气工程学院

出　　处：《电工技术》2019年第17期1-6,共6页Electric Engineering

摘　　要：采用高功率因数(Power Factor,PF)的AC-DC变换器通常在二倍工频处具有显著的输出电流纹波。为了抑制这种低频输出电流纹波并保持高功率因数,可将并联补偿电路(Parallel Compensation Circuit,PCC)的输入侧与功率因数校正(Power Factor Correction,PFC)变换器的输出侧并联。建立PCC的输入导纳模型,提出一种基于虚拟导纳的输入电压前馈(Voltage Feedforward,VFF)策略,实现对PCC输入导纳的整形,从而有效抑制AC-DC变换器的输出电流二倍工频纹波,最后通过仿真验证了分析结果。An AC-DC converter with high power factor (PF) usually suffers from a significant output current ripple at double line frequency. In order to suppress such low-frequency output current ripple and maintain high PF, a parallel compensation circuit (PCC) is connected in parallel with the output of a power factor correction (PFC) converter. In this paper, an input admittance model of the PCC is established. To further reduce the low-frequency output current ripple, an input voltage feedforward (VFF) control with a virtual impedance is presented which realized the shaping of the input admittance of PCC, so that the output current ripple of AC-DC converter can be effectively suppressed. Finally, simulation results showed the analysis is correct.

关 键 词：功率因数 并联补偿电路 输入导纳模型 虚拟导纳 二倍工频纹波 

分 类 号：TM46[电气工程—电器]