摘要
模块化多电平换流器MMC(modular multilevel converter)是电压源换流器型直流输电领域的一种新型拓扑,与传统的两电平存在一定的不同,因而对其建模及控制策略进行研究,有重要的意义。论文介绍了MMC的拓扑结构及工作原理。在考虑桥臂电抗的基础上,推导出模块化多电平换流器型直流输电MMC-HVDC(modular multilevel converter-high voltage direct current)的数学模型,进一步得到MMC-HVDC的简化电路图。在PSCAD/EMTDC下搭建了21电平MMC-HVDC系统,在dq同步旋转坐标系下,采用前馈解耦控制策略进行仿真研究,仿真结果验证了该数学模型的正确性和控制策略的有效性。
Modular multilevel converter （MMC） is a new topology in VSC-HVDC,which is different from the conventional two level VSC. Therefore, it is significant to study the modeling and control strategy of MMC- HVDC. The topology and working principle of MMC are introduced in this paper. Considering the reactance of the bridge,the mathematic model of the MMC-HVDC was developed, and the simplified circuit diagram of MMC-HVDC was obtained. The 21-level MMC-HVDC system was constructed in PSCAD/EMTDC environ- ment. In the synchronous dq reference frame, the feed forward compensation control strategy is applied, and the simulation results verify that the mathematical model is correct and the control strategy is effective.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2012年第4期13-18,共6页
Proceedings of the CSU-EPSA
基金
"十一五"国家科技支撑计划重大项目(2010BAA01B01)
高等学校学科创新引智计划(B08013)
关键词
模块化多电平换流器
桥臂电抗
数学模型
简化电路图
控制策略
modular multilevel converter（MMC）
reactance of the bridge
mathematic model
simplified circuitdiagram
control strategy
