电气传动2019，Vol.49Issue(7)：32-37,6.DOI:10.19457/j.1001-2095.dqcd18333
模块化多电平直交流变换器的直流电压控制
Control of DC Voltage for Modular Multilevel DC/AC Converter
摘要
Abstract
Aiming at the problem of DC link voltage balance control for modular multi-level converters,a capacitive voltage balance control strategy was presented,which was applicable to any multilevel DC/AC converter formed by a single set of series-connected capacitors implementing the DC link. The new control scheme had no limit on the number of independent capacitors and branches of the DC link and could be used in single-phase or multi-phase systems and could be used in full modulation range and full load conditions. By deriving the small signal mathematical model of the relevant control loop,the optimal compensator design criterion was derived. Finally,the control strategy was applied to the four-level three-phase DC/AC converter. The simulation and experimental results show that the capacitor voltage can be well balanced with the controller,and the effectiveness of the control strategy has been verified.关键词
多电平/有源钳位/脉宽调制/电容电压平衡/虚拟矢量Key words
multi-level/active-clamped/pulse width modulation(PWM)/capacitor voltage balance/virtual vector分类
信息技术与安全科学引用本文复制引用
罗文华,马捍超,张伟,李勇杰,王建..模块化多电平直交流变换器的直流电压控制[J].电气传动,2019,49(7):32-37,6.基金项目
国家电网公司科技项目(5207EG170004) （5207EG170004）
