应对高杂散电感的三电平ANPC拓扑改进调制策略  

Improved Modulation Strategy for Three-level ANPC Topology With High Stray Inductance

作　　者：段立扬 刘飞鹏 许烈[2] 郭有贵[1] DUAN Liyang;LIU Feipeng;XU Lie;GUO Yougui(School of Information and Engineering,Xiangtan University,Xiangtan 411105,China;Advanced Electric Power Transformation and Research Center,Tsinghua University,Beijing 100084,China)

机构地区：[1]湘潭大学信息工程学院,湘潭411105 [2]清华大学先进电能变换与电气化交通研究中心,北京100084

出　　处：《高电压技术》2021年第2期637-644,共8页High Voltage Engineering

基　　金：国家自然科学基金(51277156)。

摘　　要：针对高频大功率三电平有源钳位型(active neutral point clamped,ANPC)电路运行时的四象限换流回路进行了分析,考虑高杂散电感下不同换流回路对ANPC运行的影响,分别得出小换流回路与大换流回路的电压应力情况。对比了ANPC三电平正弦脉宽调制(sinusoidal pulse width modulation,SPWM)中的两种调制策略载波层叠(phase disposition pulse width modulation,PDPWM)与载波移相(phase shift pulse width modulation,PSPWM),为尽量避免大换流回路应采用PDPWM调制策略。在高杂散电感的情况下,加入吸收电容会后产生谐振,通过对其换流回路进行详细分析,总结出谐振产生的原因,提出了改进的PDPWM的调制策略。仿真与实验结果验证了理论分析的正确性,谐振得到有效的抑制。We analyzed the four-quadrant converter commutation loop which operates with high frequency high power three-level active neutral point clamped(ANPC)converter.Considering the influence of different commutation loops on ANPC under high stray inductance,we obtained the voltage stress of small commutation loop and large commutation loop,respectively.By comparing two modulation strategies of sinusoidal pulse width modulation(SPWM)in three-level ANPC,namely,phase disposition pulse width modulation(PDPWM)and phase shift pulse width modulation(PSPWM),the PDPWM modulation strategy is adopted to avoid large commutation loop as much as possible.In the case of high stray parameters,the resonance will be generated after the absorption capacitor is added.By analyzing the commutation loop in detail,the causes of resonance are summarized,and the improved PDPWM modulation strategy is put forward.Simulation and experimental results show that the theoretical analysis is verified and the resonance is effectively suppressed.

关 键 词：ANPC PSPWM PDPWM 杂散电感 换流回路 谐振 

分 类 号：TM73[电气工程—电力系统及自动化]