基于多微电网投影的配电系统协调恢复方法

doi:10.11930/j.issn.1004-9649.202405103

摘要/Abstract

摘要：

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。

关键词: 韧性, 配电网恢复, 恢复, 微电网

Abstract:

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.

Key words: resilience, distribution system restoration, restoration, microgrid

祝士焱, 许寅, 和敬涵, 王颖. 基于多微电网投影的配电系统协调恢复方法[J]. 中国电力, 2024, 57(9): 224-230.

Shiyan ZHU, Yin XU, Jinghan HE, Ying WANG. A Restoration Method for Distribution System Based on Projection of Multiple Microgrids[J]. Electric Power, 2024, 57(9): 224-230.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202405103

https://www.electricpower.com.cn/CN/Y2024/V57/I9/224

图/表 12

图 1 微电网参与恢复的虚拟节点

Fig.1 Virtual node of microgrid

图 2 恢复能量的虚拟流分解

Fig.2 Virtual stream decomposition for energy restoration

图 3 顶点搜索算法

Fig.3 Vertex search algorithm

图 4 含多微网的配电系统

Fig.4 The power distribution system with multiple microgrids

图 5 双层协调恢复流程

Fig.5 The two-layer restoration process

图 6 含3个微电网的配电系统算例

Fig.6 Case of a power distribution system with 3 microgrids

图 7 MG1协调变量投影可行域

Fig.7 Feasible domain of coordination variable projection of MG1

图 8 恢复后的配电系统拓扑

Fig.8 Distribution system topology after restoration

图 9 各电源和各微电网联络线有功功率

Fig.9 The active output of each power source and each microgrid tie line

表 1 微电网的负荷恢复情况

Table 1 The restoration status of microgrid load

微电网		恢复负荷
MG1		一级负荷5、一级负荷11
MG2		一级负荷5
MG3		一级负荷1、一级负荷7、二级负荷5

图 10 微网联络线和微网内电源有功功率

Fig.10 The active power of microgrid power supply and tie line

表 2 负荷恢复情况

Table 2 The restoration status of load

方法	负荷类型	配电网	MG1	MG2	MG3
策略1	一级	6、16、18、28	5	—	1、7
策略1	二级	—	7	—	3、6
策略2	一级	6、9、16、18、28	5、11	5	1、7
策略2	二级	7、26	—	—	—
本文方法	一级	6、9、16、18、28	5、11	5	1、7
本文方法	二级	—	—	—	3、5

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