考虑开关状态集调整的含光伏并网配电网动态故障恢复方法

故障恢复作为智能配电网自愈能力的重要保障,对系统运行可靠性至关重要。针对含分布式光伏并网的配电网故障恢复问题,计及故障期间光伏出力和负荷水平变化建立光伏型配电网动态故障恢复方法。以当前时段系统失电负荷量最小为目标函数,计及网络辐射状约束、功率平衡约束、节点电压约束、开关状态集约束等必要约束条件建立光伏型配电网动态故障恢复方法。所建立的模型通过故障期间改变系统开关状态集使得故障恢复方案对于运行工况进行适应从而减少失电负荷量。采用种群的精英策略和混沌搜索对基本萤火虫算法进行改进,采用改进萤火虫算法对所建立的模型设计求解流程。最后通过仿真算例验证了所建立模型的有效性。

Dynamic fault recovery method of a photovoltaic distribution network considering switch state set adjustment

As an important guarantee for the self-healing ability of an intelligent distribution network,fault recovery has been very important for the operational reliability of the system.For the distribution network fault recovery with distributed photovoltaic grid connection,considering the photovoltaic output and load level changes during the fault period,a dynamic fault recovery is built.Taking the minimum load loss as the objective function,considering the network radiation,power balance and node voltage constraints,the switch state intensive beam and other necessary constraints,the recovery method is established.By changing the switch state set of the system during the fault period,the established model makes the fault recovery scheme adapt to the operational conditions,so as to reduce the load loss.The elite strategy of population and chaos search are used to improve the basic firefly algorithm,and it is used to design and solve the model.Finally,the effectiveness of the model is verified by a simulation example.