基于模块化多电平换流器的STATCOM模型预测控制策略  

Model Predictive Control of Modular Multilevel Converter-Based STATCOMs

作　　者：曹穆 王跃[1] 刘普[1] 丛武龙 

机构地区：[1]西安交通大学电气学院,陕西西安710049

出　　处：《电气传动》2013年第S1期52-56,共5页Electric Drive

摘　　要：提出了基于模块化多电平换流器(MMC)的STATCOM模型预测控制策略,实现了高动态响应的STATCOM。推导了MMC-STATCOM离散时间模型,预测其状态变量,通过合理地选择代价方程,使用单一模型预测控制器即可实现对MMC直流侧电压和交流侧输出电流的控制。针对补偿负载不平衡的情况,采用双同步坐标变换解耦的方法获得补偿电流指令。仿真结果验证了模型预测控制策略的有效性和理论分析的正确性,MMC-STATCOM具有良好的不平衡负载补偿能力和快速的动态响应能力。This paper proposes a model predictive control strategy for a novel static synchronous compensator(STATCOM)topology based on Modular Multilevel Converter(MMC),which is hereafter called MMC-STACOM. It has fast dynamic response performance. The discrete-time model of the system is derived,which is used for selecting the best combination of the submodules to minimize a defined cost function. A decoupling network based on double synchronous coordinate system which is originally used in software phase locked loop is now used to detect the dynamic compensation current. The simulation results show the effectiveness of the model predictive control strategy and demonstrate a satisfactory response of MMC-STATCOM for compensating the unbalanced load.

关 键 词：模块化多电平换流器 STATCOM 模型预测控制 双同步坐标变换 解耦网络 不平衡负载 

分 类 号：TM761.1[电气工程—电力系统及自动化]