含智能软开关的智能配电网分布式供电恢复方法

Distributed Power Restoration Method for Smart Distribution Network with Soft Open Point

为提高供电恢复方法性能,更好地应对智能配电网规模不断扩大、结构日趋复杂、运行方式更加灵活多样的形势,提出了一种含智能软开关的智能配电网分布式供电恢复方法。首先,以电网分布式的拓扑信息和电气量信息为基础,采用网络逐步戴维南等值计算方法,对供电恢复过程中各节点的电气量约束条件进行就地逐步计算,能够更好地适应智能软开关在供电恢复过程中输出不断调整的工作特性。然后,分析了智能软开关的控制原理和工作特性,尤其是在分布式供电恢复过程中的控制策略和输出调整特性,提出了基于配电网逐步戴维南等值的供电恢复电气量参数分布式计算方法,充分发挥智能软开关对供电恢复的支撑作用,进一步提升供电恢复水平。最后,通过IEEE 33节点和IEEE 69节点系统验证所提方法的有效性。

In order to improve the performance of the power restoration method and better deal with the situation of the continuously expanding scale,increasingly complex structure,and more flexible operation modes of the smart distribution network,this paper proposes a distributed power restoration method for smart distribution network with soft open point(SOP).First,based on the distributed topological information and electrical quantity information of the power grids,this paper adopts a step-by-step Thevenin’s equivalence calculation method to calculate the electrical quantity constraints of each bus in the power restoration process,which can better adapt to the working characteristics that SOP could continuously adjust the output in the process of power restoration.Then the control principle and working characteristics of SOP are analyzed,especially the control strategy and output adjustment characteristics in the process of distributed power restoration.And this paper proposes a distributed calculation method for electrical parameters in power restoration based on the step-by-step Thevenin’s equivalence of distribution network,giving full play to the support role of SOP in power restoration,and further improving the level of power restoration.Finally,the effectiveness of the proposed method is verified by IEEE 33-bus and IEEE 69-bus systems.