发电机组离相封闭母线闪络原因及其保护装置特点分析  

Cause of Generator Set Phaseisolated Bus Flashover and Characteristics of Its Protection Device

作　　者：侯永军[1] 王吉荣 张仲琪 于利宏[4] 

机构地区：[1]北方联合电力有限责任公司,内蒙古呼和浩特010020 [2]国电内蒙古东胜热电有限公司,内蒙古鄂尔多斯017000 [3]山西鲁能河曲发电有限公司,山西河曲036500 [4]北方联合电力有限责任公司包头第二热电厂,内蒙古包头014030

出　　处：《内蒙古电力技术》2012年第3期24-28,共5页Inner Mongolia Electric Power

摘　　要：近年来,一些电力企业发电机组离相封闭母线闪络、结露的事故频繁发生,影响了发电机组安全稳定运行并造成一定的经济损失。文章结合事故实例,分析了离相封闭母线发生事故的原因,主要是由于封闭母线密封不严,保护系统不完善,季节性气候影响,布置结构缺陷,保护装置存在问题,封闭母线内绝缘子的影响等多种原因所致。介绍如何正确使用微正压装置及微正压装置在防止封闭母线结露、闪络等故事隐患方面起到的作用,对国内常用的吸附式、冷凝式、高分子膜式3种微正压装置进行了性能分析与比对。In recent years, flashover and condensation of generator isolated-phase bus occured frequently in some of the electric power enterprise, affecting safe and stable operation of power generation units and causing certain economic loss. Based on the accident example, the article has analyzed in isolated-phase bus from the cause of the incident, largely due to seal lax of the isolated-phase bus, imperfect protection system, the seasonal climate impact, decorate structure defects, protection device problems, isolated-phase bus to the influence of insulator. Introduce how to use the positive pressure device and the positive pressure device to prevent condensation in enclosed bus network. Make comparison and analysis of adsorptioning, condensing, polymer membrane of micro positive pressure equipment commonly used in China.

关 键 词：发电机 离相封闭母线 结露 闪络 微正压装置 选型 

分 类 号：TM645.11[电气工程—电力系统及自动化]