应对脱离配电网情况的单三相多微网组合分析及切换控制

Combination analysis and switching control of multiple single/three phase microgrids for active separation from distribution network

考虑单相及三相微网两者在地域上接入较为相近,互联而形成单三相多微网系统。由于其复杂的运行方式,亟待解决如何实现多微网灵活无缝切换的问题。介绍了单三相多微网系统拓扑结构;当多微网系统为应对脱离配电网情况时,即常规主动并转离,通过互联方案预筛选得到初始方案后,基于模糊多目标决策得到多微网互联方案;通过给定的互联方案目标进行系统状态平滑切换。所提策略经算例验证可行,为多微网切换控制技术提供建议性方案。

Because of being close to each other,multiple single-phase and three-phase microgrids are interconnected to form a combination of single/three phase microgrids,and the flexible seamless switching of its microgrids becomes more urgent due to its complicated operating modes. Its topology is introduced. The preliminary partition schemes are selected for its active separation from the distribution network,and the fuzzy multi-objective decision-making is applied to obtain the optimal partition scheme,according to which,the seamless switching of system states is conducted. Case study indicates that,the proposed method is feasible,which provides a suggestive scheme for the switching control of multiple single-phase and three-phase microgrids.