基于DIGSILENT仿真软件的微电网稳定性研究

Study on Stability of Micro Power Grid Based on the DIGSILENT Simulation Software

微电网具有联网、孤岛和两种运行状态之间切换的三种暂态运行状态,因此保证良好供电可靠性是微电网存在的必要条件。研究了微电网运行的稳定性,介绍了微电网的相关概念,并且提出微电网发展的关键问题是确保微电网稳定性。介绍了DIGSILENT/Power Factory仿真软件,根据微电网内分布式电源的输出特性和负荷需求特性,运用DIg SILENT/Power Factory构建出一个微电网,就微电网能否在发生不同故障时,仍然保证其稳定性问题,进行了不同运行状况下微电网的动态特性分析。

Because micro-grid has three transient running states that are networking, island and switching between the two operations,it is a necessary condition for the existence of micro-grid to ensure good power supply reliability. In this paper, the stability of micro-grid operation was studied. First, the related concept of micro-grid was introduced and it was treated as the key issue to raise micro-grid development to ensure the stability of the micro-grid. Secondly, the DIGSILENT/PowerFactory simulation software was introduced. Finally, according to the output characteristics of the distributed power in the micro-grid and the demand characteristics of load, the DIgSILENT/PowerFactory was used to construct a micro-grid, and the dynamic characteristics of the micro-grid were analyzed at different operating conditions to guarantee the stability of the micro-grid when different faults occurred.