光伏多电平电流重注入换流器电流控制方法的研究  

Research on Current Control Method of MLCR-CSC in Photovoltaic Generation System

作　　者：赵建阳[1] 张福民[1] 刘福贵[1] 刘永和[2,3] 王晨宇[1] 

机构地区：[1]河北工业大学电气工程学院,天津300130 [2]内蒙古工业大学电力学院,呼和浩特010080 [3]坎特伯雷大学电气与计算机系

出　　处：《高电压技术》2014年第8期2558-2563,共6页High Voltage Engineering

摘　　要：针对电压型光伏换流器难以高压大功率化的问题,提出使用一种新型多电平电流重注入换流器(MLCR-CSC)。它在传统换流器拓扑结构上附加了重注入拓扑电路,控制方法则采用了基于H∞重复控制器的直接电流控制策略。MATLAB/Simulink仿真结果表明:该换流器实现了高压大功率晶闸管零电流关断(ZCS)(每个基波周期有6个脉宽可调的零电流时刻),并且其网侧电流不接入滤波器总谐波畸变率(THD)降低到3.95%,达到了消除谐波的目的;多组MLCR-CSC协调控制可以实现电流超前或者滞后电压30o,即可实现四象限运行。Since it is difficult to apply voltage source converter in high-power photovoltaic generation system, we proposed a new converter topology, namely, the multi-level current reinjection current source converter （MLCR-CSC）, in which a reinjection circuit is added to the traditional 12-pulse converter, and the Hoo repetitive controller is used as a con- trol strategy. Simulation of MLCR-CSC in MATLAB/Simulink shows that the converter realizes ZCS （zero-current switch-off） of high-voltage high-power thyristors, namely, there are six adjustable zero-current pulse widths in every fundamental cycle, and it decreases the total harmonic distortion of the current on AC-side in the absence of filters to 3.95% so as to reduce the harmonic. Moreover, the MLCR-CSC is able to generate a current with leading or lagging by 30° so as to realize four-quadrant operation.

关 键 词：MLCR-CSC 重注入拓扑电路 H∞重复控制 ZCS 消除谐波 4象限运行 

分 类 号：TM46[电气工程—电器]