摘要
介绍了模块化多电平换流器的结构及原理,并搭建了数学模型。基于MMC的电容电压波动和环流问题,设计了MMC的装置级控制器。最后,通过Matlab/Simulink搭建了包含该控制器的MMC仿真模型。结果证明,该控制方法可有效地平衡换流器子模块的电容电压及抑制内部环流,并且不会对MMC外部输出的交流电压和电流产生负面影响。
The principle and topology of modular multi-level converter（MMC） were described,and a mathematical model was set up.Based on the problems of circulating current and capacitance voltage,a device-level controller was designed.The simulation results based on Matlab/Simulink show that the control method can balance the capacitance voltage of submodule and suppress the inner circulating current of MMC.It is also shown that this additional controller doesn＇t affect the AC side dynamics of MMC.
出处
《低压电器》
北大核心
2011年第17期28-31,共4页
Low Voltage Apparatus
关键词
模块化多电平换流器
电容电压均衡
环流抑制
modular multi-level converter（MMC）
capacitance voltage balancing
circulating current suppressing
