考虑动态重构的主动配电网多目标双层优化调度方法

提出一种考虑网架动态重构的主动配电网双层优化调度模型。模型上下层的优化目标均为运行费用最小和系统快速电压稳定性最优，下层优化目标是上层优化目标的组成部分，通过定义相同目标函数实现上下层决策变量的协同优化。模型上层决策变量是各个重构时段内的网架结构，采用基于基本环路的网架十进制编码方式，提高网络重构的求解效率。模型下层的决策变量是各主动管理时段内分布式电源出力、补偿电容器、静态无功补偿器的投切、OLTC动作情况，实现主动配电网的最优调度。采用IEEE 33节点配电系统验证所提方法的有效性。仿真结果表明，所提动态重构方法能大大提升网络重构的求解效率，所提双层优化模型能有效降低配电网运行费用，同时提升系统电压稳定性。

Multi-objective bi-level optimal dispatch method of an active distribution network considering dynamic reconfigurations

A bi-level optimal dispatching model for an active distribution network considering dynamic reconfiguration is put forward. The optimal functions of both levels are lowest operational cost and best fast voltage stability. The optimal function of the lower level is part of that of the upper level. The coordination optimization is realized by defining the same optimal function of the upper and lower levels. The decision variables of the upper level are grid structure in every reconfiguration period. To improve the calculation efficiency, a decimal encoding method based on fundamental loops is employed. The decision variables of the lower level are the power of distribution generation, the reactive power of capacitor banks and static var compensator, and tap position of OLTC to achieve the optimal dispatching of the active distribution network. The IEEE 33 bus system is employed to verify the feasibility of the proposed method. The simulation results suggest that the proposed reconfiguration method can improve calculation efficiency significantly and the proposed bi-level optimal model can reduce the operational cost and improve the voltage stability of the power system simultaneously. This work is supported by Science and Technology Project of the Headquarter of State Grid Corporation of China (No. 5400-201956447A-0-0-00).