摘要
微电网的并网和孤岛2种运行方式的正确运用对提高重要负荷的供电可靠性至关重要。研究微电网的并网与孤岛运行方式之间的转换,提出一种通过连续监测大电网侧与微电网侧的电压相角和幅值的变化判断微电网运行状况进而自动转换运行方式的方法。采用PSCAD/EMTDC软件对以微型燃气轮机和燃料电池作为分布式电源的微电网进行仿真研究。仿真实验结果表明,在计划或者故障引起的切换情况下,所提微电网运行方式自动转换方法能够实现微电网运行方式的平稳过渡。
The proper implementation of grid-connected and islanding modes for a micro-grid can effectively improve the power supply reliability of important loads. The transfer method between the two operation modes was investigated. An automatic transfer method was proposed, which can give the identification of the micro-grid condition by monitoring the voltage phase angle and amplitude on both utility and micro-grid sides continuously. Tile simulation results of the micro-grid with a micro-turbine and fuel cells as distributed sources were analyzed by using the PSCAD/EMTDC software package. The results demonstrate that the proposed automation transfer method has the ability to transfer between the two operation modes seamlessly in planned or faulted conditions.
出处
《中国电力》
CSCD
北大核心
2012年第1期59-63,共5页
Electric Power
