摘要
对模块化多电平变流器MMC(modular multilevel converter)子模块电容电压测量方法进行了仿真和实验研究。1个桥臂只需1个电压传感器,对桥臂PWM调制单元的电容电压进行测量,对处于未调制时间段单元的电容电压用桥臂电流的积分运算得到。在兼顾开关损耗和电容电压均衡两个指标的基础上,综合利用2种子模块投切方式。基于TMS28035设计实验,验证了所提方法的可行性和有效性。
The measurement method for the module capacitance voltage of a modular multilevel converter (MMC) was studied through simulations and experiments. A bridge-arm needed only one voltage sensor to measure the capacitor voltage of the bridge-arm PWM modulation unit, while the capacitance voltage of a non-modulation unit was obtained according to bridge-arm current integral. In consideration of two indexes(i.e.,switching loss and capacitance voltage balance), two switching modes of module were comprehensively utilized. Experiments were designed based on TMS28035, and the results verified the validity and effectiveness of the proposed control method.
作者
马凯
于佳丽
MA Kai;YU Jiali(School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,Chin)
出处
《电源学报》
CSCD
北大核心
2018年第3期137-143,共7页
Journal of Power Supply