基于综合协调优化的两阶段配电网动态重构研究

Research on Two -stage Dynamic Reconfiguration of Distribution Network Based on Comprehensive Coordinated Optimization

摘要:

针对配电网动态重构，常需要考虑长时间尺度下的合理规划综合考虑负荷功率变化以及光伏、风电等分布式电源的出力变化，及时调整网络拓扑结构使得网络损耗和电压偏差尽可能地小，同时还需顾及网络拓扑结构改变时断路器动作次数与断路器组合冲突问题。为此，文中提出了一种基于综合协调优化的两阶段配电网动态重构法，将配电网动态重构分为两个阶段：1）以网损最低为目标，以基于有序环网的启发式规则灰狼静态重构算法对配电网所有时段进行重构寻优；2）对最优解进行综合协调优化，并提出削减规则策略与时段融合策略，按顺序缩减动态重构的断路器动作次数。仿真结果表明，该方法不仅可以有效降低网损，提高配电网各个节点的电压值，且大幅度降低断路器动作次数。

Abstract:

For the dynamic reconfiguration of distribution network, it is usually necessary to consider the rational planning of distribution network under a long time scale. And it should consider the load variation and output changes of solar, wind and other distributed power, change the network topology in time to make the network loss and voltage deviation as small as possible, and at the same time it also needs to consider the conflicts of switching times and the combination of circuit -breaker when network topology changes. So a two -stage dynamic reconfiguration method of distribution network based on comprehensive coordinated optimization is proposed, which is divided into two stages: in the first stage, taking minimum network loss as object, the grey wolf static reconfiguration algorithm with heuristic rules based on ordered ring is used to reconstruct and optimize the whole periods of distribution network, and in the second stage, the optimal solutions of whole periods are comprehensively coordinated and optimized, and the switching times of dynamic reconfiguration are reduced sequentially according the proposed reduction rule strategy and period fusion strategy. The simulation results show that the proposed method can not only reduce the network loss and improve the voltage value of each node, but also greatly reduce the switching times.