自适应消弧线圈接地系统故障选线实用新方法  

New Adaptive Method for Fault Line Selection in Non-solidly Grounded System

作　　者：束洪春[1,2] 刘娟[1] 司大军[2] 张杰[1] 

机构地区：[1]昆明理工大学电力工程学院,云南省昆明市650051 [2]哈尔滨工业大学电气工程系

出　　处：《电力系统自动化》2005年第13期64-68,83,共6页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50347026;50467002)云南省科技攻关项目(2003GG10)云南省应用基础研究项目(2002E0025M;2004E0020M)已申请中国发明专利(200510010793.6)~~

摘　　要：针对现有暂态量选线方法在电压过零附近时故障灵敏度低的不足,提出一种通过提取衰减直流分量的自适应方法,不仅能使保护尽可能适应消弧线圈接地系统各种变化,而且有很好的抗干扰能力,无须整定,进一步改善了保护的性能,与暂态量选线方法配合可以形成完善的故障选线方案。大量的数字仿真结果表明,该方法有效、可靠。In order to overcome the low sensitivity of the protection based on transient components when the faulty voltage passes zero, this paper presents a new adaptive method by using the decaying DC component. With great adaptability to various faults occurred in the systems with arc suppression coils, considerable immunity to noises and no requirements of pre-setting, the overall performance of the protection has been upgraded. Hence a better scheme can be developed by the combination of this new method and existing methods based on the transient components. Large amount of digital simulation results show that the proposed method is effective and reliable.

关 键 词：小电流接地系统 单相接地故障 自适应保护 衰减直流分量 

分 类 号：TM862[电气工程—高电压与绝缘技术]