交错并联型380V大容量电压扰动发生器设计

Design of an Interleaved Paralleled High Capacity 380 V Voltage Disturbance Generator

对380 V大容量电压扰动发生装置的设计难点进行了分析,提出基于H桥交错并联结构的新型方案。该结构与常见H桥级联拓扑互为对偶关系,通过结合多绕组变压器和脉宽调制(PWM)整流技术,实现单位功率因数输入和并联模块间的电气隔离。结合装置主电路拓扑,提出结合直流电压前馈控制和载波移相的控制方法,可有效降低380 V大容量电压扰动发生器的负载调整率。仿真和实验结果验证了该方案的可行性和有效性。

Design difficulties of the 380 V large capacity voltage disturbance generator is analyzed.A novel scheme based on interleaved paralleled H-bridges topology is proposed.With dual relationship to the H-bridge cascaded topoi- ogy, combined with multi winding transformers and pulse width modulation （PWM） rectifier technology, the topology re- alizes unit input power factor and electrical isolation between the paralleled modules.Based on the new topology, a control method composed of DC voltage feed forward control and carrier phase shifting PWM method is presented.The scheme significantly reduces load regulation of the voltage disturbance generator.Feasibility and validity of the pro- posed topology and control method are proved by simulations and experiments.