分布式交直流变换器及其有源功率解耦控制

Distributed AC/DC Converter and Its Active Power Decoupling Control

功率解耦控制能够有效抑制分布式交直流功率变换过程中的二次功率扰动,用附加解耦电路作为直流侧二倍频脉动的补偿单位,可解决交直流侧功率不平衡的固有问题。因此,提出一种应用于V2G场景的分布式交直流功率变换拓扑及其有源功率解耦控制方法,详细分析了所提解耦拓扑的工作原理,并在双环控制基础上引入内电流相位基准校正策略,在改善分布式交直流变换拓扑电能质量的同时获得良好的功率解耦性能。最后通过一台1.2 kW的实验样机证实了所提方法的有效性和可行性。

Power decoupling control can effectively suppress the secondary power disturbance in the distributed AC/DC power conversion process,and the additional decoupling circuit is used as the compensation unit for the double frequency fluctuation in the DC side,so as to solve the inherent problem of power imbalance in the AC/DC side.Therefore,a distributed AC/DC power conversion topology and its active power decoupling control method for V2G are proposed,the working principle of the proposed decoupling topology is analyzed in detail,and the internal current phase reference correction strategy is introduced based on the double-loop control,which can improve the power quality of the distributed AC/DC conversion topology and obtain good power decoupling performance.Finally,a 1.2 kW experimental prototype is used to verify the effectiveness and feasibility of the proposed method.