基于新型PD-PWM偏置分配策略的电感储能型全桥子模块并联变流器

Inductance Charge FBSM Shunt Converter Based on Novel PD-PWM Bias Distribution Strategy

基于电感储能的全桥子模块并联结构能够直接对并网电流波形进行控制。随着器件技术与超导技术的进步,这种模块化的电流型变流器在储能领域具有较好的前景。但是其各子模块电感存在均流的问题。本文针对这一问题,提出一种新的PD-PWM载波偏置分配策略,有效解决了上述问题。本文详细描述了该方案工作原理,仿真验证了所提出控制策略的均流效果。

The shunt structure of full bridge sub module based on the inductance charge can control dir-ectly the grid connected current waveform. With the development of element and superconducting tec-hnology,this kind of modular current converter has a good prospect in the field of energy charge. However,the inductor of each sub model has problem of current balancing. In view of this problem,a new PD-PWM carrier bias distribution strategy is proposed in this paper to solve above problem effe-ctively. The operating principle of the proposed scheme is described in detail and the current balan-cing result of the proposed control strategy is simulated and verified.