模块化多APF并联环流抑制研究

摘要

To solve the circulating current problem in the parallel operation system of modular multi-APF,this paper presents a control strategy for inhibition of circulating current in view of the causes of generation of circulating current.Through PI regulation,the coordinated control strategy for positive,negative and zero-sequence can adjust the current of the device so as to eliminate circulating current.The predictive control strategy has a time-advanced characteristic,which can eliminate phase difference caused by signal delay,thus attaining the purpose of eliminating circulating current.Simulation results verify the feasibility and validity of the proposed control strategy.%为研究解决模块化多APF的并联运行系统中的环流问题,根据环流产生的原因,提出了环流抑制的控制策略.正序、负序和零序协调控制的策略能够通过PI调节对装置电流大小进行调节从而消除环流,预测控制策略本身存在的超前特性能够消除信号延迟带来的装置电流相位差异,从而达到消除环流的目的.仿真结果验证了控制策略的可行性和有效性.