H桥级联STATCOM的控制策略及仿真  

Control Strategy and Simulation of STATCOM Based on Cascaded H-Bridge

作　　者：陈兴华[1] 朱长胜[1] 王海龙[1] 白雪垠[1] 

机构地区：[1]内蒙古工业大学信息工程学院,内蒙古自治区呼和浩特市010051

出　　处：《电网技术》2009年第19期119-122,共4页Power System Technology

基　　金：内蒙古自然科学基金资助项目(200408020802)

摘　　要：介绍一种新型H桥级联静止同步补偿器(static synchronous compensator,STATCOM)的拓扑结构,它由传统的12脉冲变换器和一个H桥链构成,结合了多电平、软开关和注入技术,降低了交流侧电压谐波含量,解决了串联开关动态电压平衡的问题。文章证明了其在大功率场合下应用的可行性和稳定性,针对系统的强非线性,利用局部线性化的方法,采用单变量控制策略设计比例积分调节器,实现闭环控制。仿真结果验证了该拓扑结构的STATCOM的优越性和所采取控制策略的可行性。The topological structure of a new type of static synchronous compensator （STATCOM）, which consists of traditional 12-pulse converter and a cascaded H-bridge, is presented. The purpose of designing such a topological structure, which integrates the concepts of multi-level, soft-switching and re-injection, is to reduce the voltage harmonic content at AC side and to solve dynamic voltage balance among the switches connected in series. In order to suit to the strong nonlinearity of converter system, by use of local linearization the single-variable control strategy is applied to the design of proportional-integral （PI） regulator, thus the close-loop control is implemented. Both feasibility and reliability of such a topological structure applied to the environment of high power capacity, the feasibility of the adopted control strategy and the superiority of the STATCOM based on the presented topological structure are verified by simulation results.

关 键 词：H桥级联 静止同步补偿器(STATCOM) 比例积分(PI)调节器 谐波含量 动态电压平衡 

分 类 号：TM714[电气工程—电力系统及自动化]