计及关键负荷功能恢复需求的韧性城市配电网恢复方法

大停电后,利用城市配电网本地分布式电源快速恢复重要负荷,是减小停电损失、提升电网韧性的有效方法。城市中既存在需要电、水、气等各类资源共同支撑才可实现正常运转的终端用户负荷,也有如交通灯、水泵等关键基础设施负荷,且电网、用户负荷、关键基础设施负荷之间存在密切的耦合关系,需要在恢复决策时予以考虑。提出了一种计及关键负荷功能恢复需求的多时段配电网故障恢复方法。在荷侧,考虑了用户负荷功能对于电、水、气资源的需求及交通负荷用电需求;在网侧,考虑了电网、水网、气网的运行约束;在源侧,考虑了可移动发电资源接入灵活和本地发电资源能量有限的特点。算例测试结果表明,所提方法可最大化恢复多类型负荷的社会功能,实现有限发电资源的最优分配。

Distribution System Restoration Method Considering the Function Restoration Requirements of Critical Loads

After a major power outage, using the local distributed generators of the urban distribution system to restore critical loads is an effective method to mitigate outage and improve the resilience. The loads in urban power grid include the customer loads that can only be functioned with the joint support of various resources such as electricity, water and gas, as well as the critical infrastructure loads such as traffic lights and water pumps. Besides, there exists closed interdependency among power grid, customer loads, and critical infrastructure loads. In this paper, a multi-period restoration method for distribution system critical loads considering the load function requirements is proposed. On the load side, the power, water, and gas demand of customer loads and the power demand of traffic loads are considered. On the grid side, the operation constraints of power distribution system, water network, and gas network are considered. On the source side, the flexible access of mobile resources and limited resources of local distributed generators are considered. The results of case studies show that the proposed method can maximize the social function of various loads and realize the optimal allocation of limited generation resources.