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在城市配电网发生大面积停电时,移动应急电源为重要用户提供孤岛应急电力资源。在配电网图模型的基础上,提出将孤岛划分问题转化为祖先约束背包问题,利用图论的精确递归法解决。首先深入研究了最优接入点的优化:通过在配电网每个节点形成孤岛,获得每个节点对应恢复负荷的失负荷价值总和。然后以此为目标,搜索到单台移动应急电源最优接入点,并利用多约束优化解决岛内电源接入点搜索问题。最后,在单台移动应急电源最优接入点搜索方法的基础上,给出了多台移动应急电源联合应急的方案制定方法,算例结果证明了该方法能最大程度地利用移动应急电力资源减小重要用户的经济损失。
In the city power distribution grid in the event of a large power outage, the mobile emergency power supply for critical users island emergency power resources. Based on the distribution network model, this paper proposes to convert the islanding problem into an ancestral constraint backpack problem, and solve the problem by using the exact recursion method of graph theory. First, the optimal access point optimization is studied in depth. By forming isolated islands at each node of the distribution network, the sum of the lost load values of each node corresponding to the restoration load is obtained. Then based on this, we search the optimal access point of a single mobile emergency power supply and use multi-constraint optimization to solve the power access point search problem in the island. Finally, based on the search method of the optimal access point of a single mobile emergency power source, a scheme of multiple emergency solutions for mobile emergency power supply is given. The results show that this method can make full use of mobile emergency power resources Reduce the economic losses of important users.