摘要
模块化多电平换流器(MMC)是一种适用于轻型直流输电系统(VSC-HVDC)的新型换流器,笔者在分析其原理的基础上研究了MMC的运行特性,并搭建了数学模型。文中所提出的MMC控制方法采用了移相载波调制策略(CPS-SPWM)的思想,针对MMC的电容电压均衡问题,通过算法重新分配子模块触发脉冲序列,最后仿真验证了该方法的正确性和可行性。
Modular multilevel converter （MMC） is a new type of multilevel converter suitable for VSC-HVDC. Based on the analysis of its principle, MMC＇s operating characteristics is studied in this paper, and a mathematical model is set up. Subsequently, a control strategy for MMC is proposed by making use of the strategy of carried phase shifted sinusoidal pulse width modulation （CPS-SPWM）. In order to solve the capacitancevoltage equilibrium problem, the trigger pulse sequence of each sub-module is redistributed through the algorithm. Simulation demonstrates the correctness and effectiveness of the proposed strategy.
出处
《高压电器》
CAS
CSCD
北大核心
2012年第8期56-60,64,共6页
High Voltage Apparatus
关键词
模块化多电平换流器
高压直流输电
电容电压均衡
移相载波调制策略
modular multilevel converter
high voltage direct current transmission
capacitance-voltage equili-brium
carried phase shifted sinusoidal pulse width modulation （CPS-SPWM）
