摘要
为了降低多电平电压空间矢量调制(SVPWM)在实际应用中的复杂性,改善多电平变换系统的实时性.通过结合载波移相和载波层叠两种调制策略的优点,提出一种基于载波实现多电平SVPWM调制策略,不仅能够提高直流利用率,减小输出电压谐波成分,而且能大幅改善算法的计算复杂度,并且计算量不会随着电平数的增多而增加,因此可以方便扩展至任意电平.此外,新的调制策略可以保证单元箱之间的功率均衡,维持现有多电平结构中模块化的优点.最后,通过仿真和实验,验证了本文提出调制策略的有效性.
In order to reduce the complexity of multilevel voltage space vector modulation(SVPWM)in practical implementation,and improve the real-time performance of multilevel converter system,in this paper,by combining the advantages of phase shift pulse width modulation(PS-PWM)and carrier disposition PWM(PD-PWM),a novel multilevel SVPWM implementation based on carrier configuration is proposed,which can improve the utilization of the DC voltage,reduce the total harmonic distortion(THD)of the output and improve the time complexity of the algorithm,which means the novel algorithm can be easily applied to any level cascaded H bridge converters.In addition,the novel algorithm ensures the power balance between each unit,which keeps the advantage of the modular design.Finally,the effectiveness of the proposed modulation strategy is verified by simulation and experiment.
作者
肖牧轩
欧阳红林
朱颖达
何志兴
汪亮
毛学魁
XIAO Muxuan;OUYANG Honglin;ZHU Yingda;HE Zhixing;WANG Liang;MAO Xuekui(College of Electrical Engineering,Hunan University,Changsha 410082,China;State Grid Beijing Haidian Electric Power Supply Company,Beijing 100195,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第8期82-95,共14页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51677063)。
关键词
电力电子
PWM变换器
多电平载波调制
功率均衡
power electronics
PWM converters
multilevel carrier modulation
power balance
