微电网变换器可编程虚拟无源网络原理及分析

Principle and Analysis of Programming Virtual Passive Networks for Microgrid Converter

电力电子变换器是微电网系统的重要组成部分。为实现微电网变换器稳定高效运行,提出可编程虚拟无源网络(PVPN)概念,通过控制方式实现虚拟电阻/电感/电容构成的阻抗网络,根据变换器运行需要实现虚拟阻抗网络结构在线实时编程,提高了微电网变换器的系统性能。理论分析和仿真结果验证了该概念的可行性。

Power electronic converters take the important part in microgrid systems.In order to operate the microgrid converters in a reliable and efficient way, the programming virtual passive network （PVPN） is proposed.The virtual impedance network, which consists of the resistor, inductor, capacitor and their combinations, can be achieved by the proposed control strategy.The online programming feature is executed according to the converter operation require- ments, which enhances the performance of the microgrid converter.Theoretical analysis and simulation results verify the effectiveness of the proposed concept.