摘要
与多电平电压源换流器具有电容均压的问题类似,电流控制型多电平换流器同样具有子模块电感均流的问题。本文针对这一问题,提出一种基于动态偏置型PD-PWM的均流调制策略,可用于无功补偿、储能和直流输电的新型模块化电流控制型桥臂模块化多电平换流器,有效解决了其各子模块中电感的均流问题。本文详细描述了该方案工作原理,仿真验证了所提出控制策略的均流效果。
Current control muhiple level converter,similar to the multi-level voltage source converter hav-ing the capacitive grading,also has inductive current sharing issue of sub module. As for this issue,in this paper,a kid of current sharing modulation strategy based on dynamic bias PD-PWM is proposed for the new type module current control bridge arm multi-level converter for the reactive compensation, energy charging and DC power transmission,which solves effectively the current sharing issue of indu- ctance of each sub module. In this paper,the operating principle of the scheme is described and the current sharing result of the control strategy proposed is verified by the simulation verification.
出处
《电力电容器与无功补偿》
北大核心
2017年第2期155-159,共5页
Power Capacitor & Reactive Power Compensation
关键词
多电平
电流控制型
桥臂模块化
均流策略
muhi-level
current control
bridge modular
current sharing strategy
