谐振接地系统单相接地故障选线方法及应用  

Method and Application of Single Phase-to-ground Fault Line Selection in Neutral Resonant Grounded Power System

作　　者：姜鑫鑫[1] 徐华[1] 

机构地区：[1]国网上海市电力公司检修公司,上海200063

出　　处：《电力与能源》2013年第B12期67-69,74,共4页Power & Energy

摘　　要：介绍了谐振接地系统的单相接地故障选线方法，以崇明堡北变电站XHK-Ⅱ-ZP＋型消弧线圈自动调谐及接地选线装置为例，阐述了基于并联中电阻的有功电流助增法选线方法，并对装置结构、工作原理以及注意事项做了解读。分析认为，消弧线圈自动调谐及接地选线装置，能够将瞬时单相接地短路故障和永久性单相接地短路故障分别处理，既发挥了消弧线固补偿接地故障点电容电流、灭弧防止事故扩大等特点，又突显了低电阻接地方式选择性好的优点。实践证实了采用多种选线算法进行表决的综合选线方法，能够可靠地选择并切除永久性单相接地故障，从而提高线路供电的可靠性、安全性和经济性。The method of single phase-to-ground fault line selection in neutral resonant grounded power system is presented in this paper. Taking the example of XHK -Ⅱ-ZP＋device in Baobei transformer substation, the fault line selection method based on active current increasing when switching on parallel medium resistance is elaborated, including the structure, working principle and application notice of this device. Petersen coil auto- mation tuning system and fault line selection device can hold unhalanced earth fault capacitance current and extinguish are to prevent further accidents, and also have good selectivity on low resistance grounding fault. It has also been proved that the comprehensive fault line selection method using a variety of line selection algo rithm can correctly select and remove permanent single phase-to-ground fault, so as to improve the reliability, safety and economy of power supply.

关 键 词：小电流接地系统 消弧线圈 并联中电阻 选线控制 

分 类 号：TM862[电气工程—高电压与绝缘技术]