摘要
分析了模块化多电平换流器(MMC)的拓扑结构及原理。基于MMC的桥臂电流,建立了新型的电磁暂态模型,其中包括桥臂电流中基波分量、直流分量和二次分量的线性化方程。在此模型基础上,针对MMC桥臂电流中各分量提出相应控制策略,实现了换流器系统的外部功率控制和内部环流控制。通过Matlab/Simulink对基于所述模型的控制策略进行仿真试验,结果表明了控制策略的正确性和有效性。
The principle and topology of modular multilevel converter （MMC） were proposed, which can be applied to HVDC-light. The model of MMC is based on arm current, including linear equations of fundamental component, DC component and the second component of arm current. The new control strategy based on MMC arm current was presented, realizing external power control and internal circulation control of MMC. The simulation results confirm the validity and feasibility of the control strategy.
出处
《低压电器》
2013年第7期33-38,共6页
Low Voltage Apparatus
关键词
模块化多电平换流器
电磁暂态模型
功率控制
环流抑制
modular multilevel converter（ MMC ）
electromagnetic transient model
power control
circulation current suppression
