高压大功率非线性电流型STATCOM在输电网中的应用研究  

Research on High-Voltage High-Power Nonlinear Current-Source STATCOM Applied in Power Transmission System

作　　者：赵建阳[1,2] 张福民[2] 刘福贵[2] 刘永和[3] 

机构地区：[1]中国能源建设集团天津电力设计院有限公司,天津300400 [2]河北工业大学电磁场与电器可靠性省部共建重点实验室,天津300130 [3]内蒙古工业大学电力学院,呼和浩特010080

出　　处：《电气工程学报》2017年第8期34-41,共8页Journal of Electrical Engineering

摘　　要：大功率STATCOM可以为电网电力传输提供大量无功功率,然而其控制系统具有很强的非线性。为了实现STATCOM无功功率输出的线性控制,本文提出了一种基于多电平电流重注入式电流型换流器(MLCR-CSC)的电流型STATCOM,阐述了MLCR-CSC的拓扑结构和新型STATCOM的工作原理,设计了直接电流控制系统。仿真结果表明,MLCR-CSC的谐波含量低于4%,基波周期内有6个零电流时刻实现大电流过零关断。电流直接控制方式不但满足输电网对无功功率的需求,而且对不对称故障响应迅速。High power STATCOM can provide a large amount of reactive power for power transmission, however, its control system is highly nonlinear. In order to realize linear control reactive power of STATCOM, a new type is proposed based on MLCR-CSC. The STATCOM working principle is introduced, and the direct current control strategy is designed with double closed loop control system. The simulation results show that MLCR- CSC harmonic content is lower than 4%, and six zero current pulse realized large zero current switching. STATCOM satisfied the demand of reactive power in power grid and gave a quick responds during asymmetric fault.

关 键 词：电流型STATCOM MLCR-CSC 非线性控制模型 直接电流控制 零电流关断 

分 类 号：TM315[电气工程—电机]