基于VLD设计的微电网模式切换研究

Research on Microgrid Mode Switch and Control and Device Development Based on VLD

微电网相对于大电网有并网运行和孤岛运行两种运行模式,其中孤岛运行又称为离网运行。为了实现微电网与大电网之间进行幷网及离网之间的快速切换,文中首先分析了微电网的体系结构,并网型微电网在模式切换中出现的问题,同时介绍了基于许继研发的可视化仿真软件(VLD),进行并网型微电网模式控制装置的研制,以及模块化具体设计。文中设计的并网型微电网模式控制装置有效解决了以往模式控制装置进行模式切换中以分钟为单位,转换时间长的问题,现在仅需在120 ms内就可实现"无缝"并网以及离网切换,对工程应用具有推动作用。

Different from large grids,a micro-grid has two operating modes： grid-connected operation and islanding operation mode（also known as off-grid operation）. For the fast switching between grid-connected operation and islanding operation,this paper analyzes the architecture of the micro-grid and grid-connected mode switching,develops the micro-grid mode switch device,and completes the modular design based on the introduction XJ visual simulation software（VLD）. This design effectively reduces the slow mode control switching to within 120 ms,thus ＂ seamless＂ grid-connected and off-grid switching,which has wide application in engineering.