含微电网的配电网优化调度

提出一种含微电网的配电网优化调度方法。首先根据多时间尺度微电网不平衡能量预测评估出未来调度周期微电网对外的最大输出功率和最大输入功率两个评估指标;然后以最大输出功率和最大输入功率为微电网与配电网交互功率约束条件的上、下限值,建立以运行成本最小为目标的配电网经济优化有功调度模型,并提出了求解该模型的最小费用最大流计算方法;最后在经济优化有功调度的基础上进行配电网无功优化。仿真算例表明,与基于微电网单一日前调度计划曲线的主动配电网优化调度方法相比,该模型与方法能够充分考虑微电网对外呈现的功率允许调节裕度,从而更有效地减少系统运行成本,降低网损,提高电压合格率。

Optimal Dispatch Method of Distribution Network with Microgrid

This paper proposed a novel optimal dispatch method of distribution network with microgrid.The goal of the method is to minimize the operation cost of distribution system by considering the power regulation adequacy of microgrid.To evaluate the regulation adequacy,the maximum ′charging′ and ′discharging′ power of microgrid in next dispatch horizon were calculated based on unbalanced power prediction under multi-time scale.A minimum cost maximum flow algorithm was proposed to solve the optimization problem.Furthermore,the reactive power optimization of distribution network was calculated based on optimal dispatch.Simulation studies demonstrate that,compared with the normal distribution network dispatch method by considering microgrid day-head scheduling curve,the proposed dispatch method can reduce system operation cost and network loss effectively and improve the voltage qualification rate.