五相逆变器非正弦双随机空间矢量脉宽调制策略  

Non-Sinusoidal Dual Random Space Vector Pulse Width Modulation Strategy for Five-Phase Inverter

作　　者：朱琳[1] 卜飞飞[1] 黄文新[1] 浦天宇 Zhu Lin;Bu Feifei;Huang Wenxin;Pu Tianyu(Center for More-Electric-Aircraft Power System Nanjing University of Aeronautics and Astronautics Nanjing 210016 China)

机构地区：[1]南京航空航天大学多电飞机电气系统工信部重点实验室,南京210016

出　　处：《电工技术学报》2018年第20期4824-4833,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51507079);航空科学基金(2016ZC52020);江苏省普通高校学术/专业学位研究生科研创新计划(SJZZ16_0056);研究生创新基地(实验室)开放基金(kfjj20160312);中国博士后科学基金(2014M560421;2016T90454)资助项目

摘　　要：为改善五相逆变器非正弦供电的高频性能,提出一种五相空间矢量脉宽调制(SVPWM)方法,即基于随机开关延时-随机零矢量分配的非正弦双随机SVPWM算法。该调制方法根据最近四矢量SVPWM算法,在基波子空间和3次谐波子空间分别合成参考电压矢量,确定占空比和开关动作,并保持采样频率不变,将与采样时刻对应的开关动作在一定范围内随机延时,同时将插入的零矢量作用时间进行随机分配,从而实现开关频率和对称脉冲位置的双随机。仿真和实验结果表明,该调制方法实现了在不影响基波和3次谐波输出的前提下对高次谐波幅值的削弱,达到了谐波分散的目的。To improve the high frequency performance of non-sinusoidal power supply of five-phase inverter,a novel five-phase space vector pulse width modulation(SVPWM)strategy is proposed.This strategy is a non-sinusoidal dual random SVPWM method based on randomized switching time delay and randomized distribution of zero vectors.According to near four vectors SVPWM algorithm,the fundamental reference voltage vector is synthesized in the fundamental subspace as the third harmonic reference voltage vector is synthesized in the third harmonic subspace,by which the duty cycle and switching action are determined.With the sampling frequency constant,the switching action corresponding to the sampling time is randomly delayed within a certain range,while the time distribution of inserted zero vectors is randomized.Therefore,the switching frequency and the symmetrical pulse position are both randomized simultaneously.The simulation and experimental results show that the method reduces the amplitude of higher harmonics without affecting the output of fundamental and third harmonic voltage,which achieves the purpose of harmonic dispersion.

关 键 词：五相逆变器 非正弦供电 高次谐波 随机空间矢量脉宽调制 开关延时 零矢量 

分 类 号：TM761[电气工程—电力系统及自动化]