基于广义形态开闭变换的小电流接地选线算法  

Generalized Morphological Opening-closing Transform Based feeder Selection Algorithm for Neutral Un-effectual Grounded System

作　　者：高艳[1] 林湘宁[1] 刘沛[1] 

机构地区：[1]华中科技大学电力工程系,湖北省武汉市430074

出　　处：《中国电机工程学报》2006年第14期1-6,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50177011)。~~

摘　　要：单相接地故障是配网系统中最为普遍的故障情况,该文在分析小电流接地系统发生单相接地故障时零序暂态电流特点的基础上,提出了一种基于广义形态开闭变换的选线算法,该算法很好地体现了数学形态学滤波器较好的奇异点识别能力和噪声抑制能力。ATP仿真结果表明,该算法不受中性点接地方式和线路参数的影响,且具有较强的承受过渡电阻的能力。Single phase-to-earth faults are the most frequent faults likely to occur in power distribution networks. This paper analyses the characteristic of the zero sequence transient currents of a Neutral Un-Effectual Grounded System （NUEGS） when a single phase-to-earth fault occurs. Then a new algorithm for fault feeder selecting based on generalized morphological transform is put forward, which combines the excellent singularity detecting together with the noiserepressing abilities of mathematical morphology filter. The results of simulation using ATP demonstrate that this algorithm is immune to the variation of network structures and parameters It also has the ability of enduring high transition resistance.

关 键 词：电力系统 小电流接地系统 单相接地故障 零序暂态电流 广义形态开闭变换 

分 类 号：TM77[电气工程—电力系统及自动化]