基于保护距离的配电网避雷器配置优化方法

Optimization Method of Electric Distribution Network Arrester Configuration Based on Protection Distance

配网扩展时随着与配电变压器的距离变远,将会导致避雷器过多分配,而运行中数量庞大的避雷器产生的故障将可能导致不必要的停电.因此,本文旨在提出一种方法,优化避雷器的数量,并在直接雷击等情形下仍能保持配网的过电压保护水平.根据配网的不同母线类型,通过研究其在不同条件下的保护距离来优化避雷器数量,去掉多余的避雷器.本文以IEEE 34-母线配网系统为模型进行了仿真计算,并将结果与标准进行了比较,也对实际配电网络进行了分析计算,通过本文提出的算法程序可以实现在不降低电网过电压保护水平的同时实现优化,有效减少避雷器数量.

When the distribution network expands,with the distance from the distribution transformer getting farther,it will cause the arrester to be excessively distributed,and the failure caused by a large number of arresters in operation may lead to unnecessary power failure.Therefore,the purpose of this paper is to propose a method to optimize the number of arresters and to maintain the overvoltage protection level of distribution network in the case of direct lightning strike.According to different bus types of distribution network,the number of arresters is optimized by studying their protection distance under different conditions,and the redundant arresters are removed.In this paper,the IEEE 34-bus distribution network system is used as the model for simulation calculation,and the results are compared with the standard.The actual distribution network is also analyzed and calculated.Through the algorithm program proposed in this paper,optimization can be achieved without reducing the overvoltage protection level of the power grid,and the number of arresters can be effectively reduced.