一种大幅度减小间接矩阵变换器高频共模电压的调制策略  

A Modulation Strategy for Simultaneously Reducing High-Frequency Common-Mode Voltage of Indirect Matrix Converter

作　　者：鲁紫荆 李珊瑚 操孙鹏 刘旭[1,2] 孙庆国 Lu Zijing;Li Shanhu;Cao Sunpeng;Liu Xu;Sun Qingguo(State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology,Tianjin 300130 China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology,Tianjin 300130 China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学),天津300130 [2]河北工业大学河北省电磁场与电器可靠性重点实验室,天津300130

出　　处：《电工技术学报》2023年第16期4366-4375,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51907049);河北省自然科学基金项目(E2020202095);河北省自然科学基金创新群体项目(E2020202142);中央引导地方科技发展资金项目(226Z1805G)资助。

摘　　要：现有的间接矩阵变换器共模电压抑制策略大都聚焦于降低峰值而缺少对减小高频共模电压幅值的研究。基于有效矢量作用下的共模幅值和正负特性,该文提出一种大幅度减小间接矩阵变换器高频共模电压的新型调制策略,该策略的共模电压在一个输入扇区内正负方向不发生变化:整流级调制选择相邻两个有效矢量,逆变级调制在输入1、3、5扇区选择输出共模电压方向始终为正的有效电压矢量V2、V4、V6;在输入2、4、6扇区选择输出共模电压方向始终为负的有效电压矢量V1、V3、V5。通过减小共模电压在一个载波周期内的跳变次数和变化幅值,可以大幅度减小高频共模电压。最后,通过仿真和实验结果验证了该方法的有效性。An indirect matrix converter(IMC)is a new generation of AC-AC converter with broad application prospects in ships,aerospace,and wind power.IMC is composed of a rectifier and an inverter stage.Affected by the pulse width modulation(PWM),a high-frequency and high-amplitude common mode voltage(CMV)will be generated at the output during IMC operation.The CMV will damage the insulation layer of the motor winding,increase the mechanical wear of the bearing and shorten the service life of the motor.Therefore,the CMV must be suppressed.Most of the CMV suppression strategies focus on reducing the peak value.The high-frequency CMV amplitude is inhibited by adding active or passive filters to the CMV path,which not only increases the mention and cost of the system but also reduces the compactness of the IMC.Based on the amplitude and positive/negative characteristics of CMV for IMC under the action of each active vector,this paper proposes a new modulation strategy to reduce the high-frequency CMV of IMC significantly.This method significantly reduces the high-frequency CMV amplitude by decreasing the positive and negative transition times and amplitude change range of the CMV in a carrier cycle.Firstly,the rectifier and inverter stages are both divided into six sectors.The positive/negative characteristics of the CMV under the action of each active vector in each input sector are analyzed.Secondly,use active vectors that keep the direction of the CMV unchanged within an input sector for modulation.The rectifier stage selects two adjacent active current vectors in each input sector to synthesize the reference input current vector.The inverter stage selects active voltage vectors V2,V4,V6 in input sectors 1,3,5 and selects V1,V3,V5 in input sectors 2,4,6 to synthesize the reference output voltage vector.Thirdly,according to the three-phase output current direction of each inverter stage sector and the freewheeling characteristics of the freewheeling switching diodes,the switching sequence of the inverter stage active voltage

关 键 词：间接矩阵变换器(IMC) 高频共模电压 正负特性 调制策略 

分 类 号：TM46[电气工程—电器]