电力系统保护与控制Issue(10)：126-133,8.
电网不平衡下基于滑模变结构的三相电压型PWM整流器恒频控制
Constant frequency control for three-phase voltage PWM rectifier under unbalanced grid voltage conditions based on sliding mode control
摘要
Abstract
Direct power control based on sliding mode control (SMC-PDC) can achieve its control purpose and constant switching frequency control simply underα β− coordinate system without the complex d-q transformation. When the grid voltage is unbalanced, this paper sets three control objectives to control system, namely eliminating negative sequence current, eliminating active power fluctuation and eliminating reactive power fluctuation. In order to improve control accuracy, T/4-shift method is adopted to extract only positive sequence current component and negative sequence voltage component and there is no need to extract negative sequence current component. So different control commands can be achieved through corresponding power component compensation of three control objectives set before. The simulation and experimental results verify the strategy’s correctness and effectiveness.关键词
PWM整流器/直接功率控制/瞬时功率/滑模变控制/定频控制/T/4延时/电网不平衡Key words
PWM rectifier/direct power control/instantaneous power/sliding mode control/constant switch frequency/T/4 shift/unbalanced voltage condition分类
信息技术与安全科学引用本文复制引用
郭旭刚,金新民,马添翼,童亦斌..电网不平衡下基于滑模变结构的三相电压型PWM整流器恒频控制[J].电力系统保护与控制,2013,(10):126-133,8.基金项目
国家科技支撑项目 （）
