摘要
当基于模块化多电平换流器(MMC)的电机拖动系统,带恒转矩负载且运行于较低频率时,它的MMC子模块电容电压波动幅度会过大,甚至整个电机拖动系统将不能稳定运行。根据MMC子模块电容电压波动的影响因素,从增大子模块电容电压波动频率的角度出发,提出了与能量分层控制方法相结合的高频正弦量注入的低频控制策略。该策略求解思路清晰、可实施性强,最后,仿真模型验证了它的正确性和有效性。
When modular muhilevel converter（MMC） motor drag system was running at a lower frequency with a con- stant torque load, its MMC sub-module capacitor voltage fluctuates too much. Even the entire motor drive system would not be able to run stably. According to the influence factors of capacitor voltage fluctuation of MMC sub-module, from the an- gle of increasing the frequency of capacitor voltage fluctuation of sub-module, the low-frequency control strategy of high frequency sine quantity injection combined with the energy stratification control method was proposed. The strategy is clear and feasible, the simulation model verifies its correctness and validity.
出处
《微特电机》
北大核心
2017年第11期58-62,71,共6页
Small & Special Electrical Machines
关键词
模块化多电平换流器
电机拖动
低频控制
电容电压波动
能量均分
modular multilevel converter （ MMC ）
motor drive
low frequency control
capacitance voltage fluctua- tion
energy equalization
