超级电容器储能逆变器控制策略研究  

Research on control strategy of energy storage converter based on super capacitor

作　　者：李宁宁[1] 师长立 何俊强 张国伟[1] LI Ningning;SHI Changli;HE Junqiang;ZHANG Guowei(Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院电工研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《储能科学与技术》2019年第4期696-701,共6页Energy Storage Science and Technology

基　　金：国家重点研发计划(2016YFB0900400);中国科学院战略性先导科技专项(A类)(XDA21050302)

摘　　要：为了对储能逆变器在不平衡与非线性负载时的输出电压的谐波进行抑制,本文针对双级式逆变器拓扑建立数学模型,基于模型分析了直流电容中点电压波动对逆变器输出的影响,以及不平衡输出电流和谐波电流对直流电容中点电压影响的机理,进而提出了该拓扑逆变器在不平衡和非线性负载情况下抑制交流输出电压不平衡和零序谐波的抑制策略。最后建立了MATLAB仿真模型对该控制策略进行了理论验证,并在80kW样机上进行了实验验证,仿真和实验结果都表明了该控制策略的有效性。The mathematical model for the dual-stage converter topology is established. First, the influence of neutral-point voltage fluctuation of DC capacitor on the output of the converter is analyzed based on this model. Then the influence mechanism of unbalanced output current and harmonic current on DC capacitor neutral-point voltage is studied. Furthermore, the suppression control strategy of AC output voltage unbalance and zero-sequence harmonic under unbalanced and non-linear loads is proposed. Finally, a simulation model of MATLAB and a 80 kW experimental prototype are established to validate the control strategy theoretically. The simulation and experimental results proof the effectiveness of the control strategy.

关 键 词：双极式逆变器 中点电压 不平衡输出电流 谐波电流 抑制策略 

分 类 号：TQ028.8[化学工程]