考虑环间接入模式及可靠性影响的有源配电网软开关规划

针对当前软开关(SOP)规划方法未涉及馈线环间的接入模式以及配电网可靠性影响等问题,提出了一种考虑故障损失成本的SOP在馈线环内与环间的位置选择及容量配置方法.首先,分析SOP两种接入模式对配电网运行的效益,并针对环内接入提出了混合式SOP及将SOP与联络开关联动控制的方案.其次,构建了计及配电网正常、故障运行效益的双层规划框架与模型,规划层以系统年综合成本最小为目标,正常运行层考虑SOP的三相潮流调节作用优化网络状态,故障运行层基于序贯蒙特卡洛模拟可靠性评估方法计算故障成本.再次,面对该模型的离散、连续变量混合整数规划的非线性特性,提出了基于改进粒子群优化和锥规划的求解方法.最后,通过算例验证了所提方法的有效性.

Soft Open Point Planning for Active Distribution Network Considering Influence of Access Mode Between Feeder Loops and Reliability

In view of the problem that the current soft open point (SOP) planning method does not involve the access mode between feeder loops and the influence of distribution network reliability, a method for the location selection and capacity allocation of SOP within feeder loops and between feeder loops considering the failure loss cost is proposed. Firstly, the benefits of two access modes of SOP to the operation of distribution networks are analyzed, and a hybrid SOP and a linkage control scheme between SOP and the tie switch are proposed for in-loop access. Secondly, a bi-level programming framework and model are constructed considering the benefits of normal and fault operation of distribution networks. In the model, the planning layer aims to minimize the annual comprehensive cost of the system, the normal operation layer optimizes the network state considering the three-phase power flow regulation function of SOP, and the fault operating layer calculates the fault cost based on sequential Monte Carlo simulation reliability evaluation method. Thirdly, facing the nonlinear characteristics of mixed integer between discrete and continuous variables of the model, a solution method based on improved particle swarm optimization and cone programming is proposed. Finally, an example is given to verify the effectiveness of the proposed method.