摘要
模块化多电平换流器(MMC)是轻型直流输电的一种新型拓扑。本文介绍了MMC的拓扑结构及工作原理。在考虑桥臂电抗基础上推导出了MMC的电磁暂态模型,并设计了基于精确反馈线性化的MMC—HVDC非线性控制器。输电线路整流侧采用定有功功率和定无功功率控制,实现了有功功率和无功功率的解耦控制,逆变侧采用定直流电压和定无功功率控制。利用MATLAB软件搭建系统仿真模型,验证了所设计控制器的正确性。
Modular multilevel converter （MMC） is a new topology in VSC-HVDC. The paper introduced the topology and working principle of MMC. Considering the reactance of the bridge, the electromagnetic transient model of the MMC was presented. The paper designed a nonlinear controller of MMC-HVDC based on the theory of global feedback linearization. A constant active and reactive power based controller on rectifier side was designed to realize individual control for active and reactive power transmission. A constant DC voltage and reactive power based control strategy was applied on inverters side. The simulation system model was set on MATLAB and the correctness of mathematical model of applied control strategy was verified.
出处
《新技术新工艺》
2015年第5期21-25,共5页
New Technology & New Process
