考虑负荷与分布式电源变化的配电网动态重构

A Dynamic Reconfiguration of Distribution Network Considering Variations of Loads and Distributed Generators

配电网动态重构是实现配电网架优化运行的重要手段,随着电网中分布式电源(Distributed Generator,DG)的大量接入,实际配电网中负荷需求和DG的出力在不断变换,以往静态重构无法满足配电网实际运行要求。本文建立了以网络损耗、电压偏移和弃电率为优化目标的配电网重构模型,针对动态重构时段划分问题,综合考虑负荷变化和电网运行指标,采取了一种双步时段划分策略,并应用“最小回路”编码方式剔除不可行解,对蚁群算法进行改进。最后,以修改后IEEE33节点系统为算例,验证了所提方法的有效性。

Dynamic reconfiguration of distribution network is an important means to achieve the optimal operation of distribution network.With the massive access of distributed generators(DG)in power grid,the actual loads demand and DG outputs in distribution network are constantly changing,and conventional static reconfiguration methods cannot meet the actual operation requirements of distribution network.A distribution network reconfiguration model whose optimization objectives are the network loss,the voltage offset and the curtailment rate is proposed in this paper.Aimed at solving the problem of time period division in dynamic reconfiguration,load changes and grid operation indecies are considered comprehensively,and a two-step time period division strategy is adopted.And the ant colony algorithm is improved by the application of the"minimum loop"coding method to eliminate infeasible solutions.Finally,the revised IEEE33-node system is taken as an example to verify the effectiveness of the method proposed.