基于多微电网投影的配电系统协调恢复方法

A Restoration Method for Distribution System Based on Projection of Multiple Microgrids

微电网参与配电系统恢复可以提高恢复效果进而提升系统韧性。提出了一种考虑微电网隐私和参与配网应急恢复偏好的含多微网配电系统恢复方法,可以统筹协调配电网和微电网的发电资源。首先,建立基于虚拟节点和虚拟流分解的多微网参与配电网恢复的协调机制,有效保护微电网隐私;进而针对恢复问题提出了基于投影的关键恢复信息共享方法,并利用顶点搜索快速得到投影域,实现关键信息交互;然后,提出了配电网-微电网的双层协调恢复框架。其中,下层微电网向配电网提供包含恢复偏好和可行域的有限信息,上层配电网进行统筹决策,并将决策得到的联络线功率下发至微电网,下层微电网以联络线功率作为约束条件决策内部负荷恢复;最后,基于构建的含多微网配电系统,验证了所提方法的有效性和优势。

The participation of microgrids in distribution system restoration can improve the restoration effects and thereby enhance the system resilience.A restoration method for distribution system with multiple microgrids is proposed,which considers the microgrids'privacy and restoration preferences,and can coordinate the power generation resources of the distribution network and microgrids.Firstly,a coordination mechanism for multiple microgrids to participate in distribution network restoration based on virtual nodes and virtual flow decomposition is established to effectively protect the privacy of microgrids.Subsequently,a projection-based critical restoration information-sharing method is proposed to solve the restoration problem,and the vertex search is used to quickly obtain the projection domain and realize critical information interaction.And then,a two-layer coordinated restoration framework for the distribution network and microgrid is proposed,in which the lower microgrid provides limited information including restoration preferences and feasible domain to the distribution network;the upper distribution network makes overall decisions and sends the tie-line power obtained by the decision to the microgrid,and the lower microgrid uses the tie-line power as the constraints to determine the internal load restoration.Finally,based on the constructed power distribution system with multiple microgrids,the effectiveness and advantages of the proposed method is verified.