
30
doi;10.3969/j. issn. 1009 3230.2012.05.009
应用能源技术
2012年第5期(总第173期)
某300MW发电机滑环烧损事故分析与处理
段爱霞,黄永志",侯树文
(1.华北水利水电学院电力学院,郑州4500011;2.河南电力试验研究院,郑州450052)
摘要:某电厂300MW机组发生发电机滑环碳别烧损,针对发电机的实际烧损情况进行详细分析证明:集电环处风道堵塞、教热不好、弹簧特性改变、压力不均匀、电流分配不均、碳剧及弹簧片频繁跳动和报警信息没有及时发现等诸多因素,造成整个滑环及碳刷温度迅速升高,产生弧光,在滑环的高速旋转下形成环火,使碳刷、刷、铜支架等烧软、烧熔,造成发电机滑环烧损事故,针对上述原因采取相应的措施,使发电机运行正常。
关键词:发电机;滑环;风道堵塞;碳剧
中图分类号:TP271.1
文献标志码:B
文章编号:10093230(2012)05-003004
Analysis and Treatment of Generator Slip-ringBurning
AccidentinthePowerPlant
DUAN Ai-xia', HUANG Yong-zhi’, HOU Shu-wen"
(1.Departmcnt of Power Enginecring, North China Institute of Water Conservancy and Hydroelectric Power,Zhengzhou 450011, China; 2.Henan Electric Power
Research Institute, Zhengzhou 450052, China)
Abstract: The slip-ring brush generator was burmed in the 300MW power plant , the actual loss condition analysis prove that air duct of collector ring was blocked and the dissipate leat was not good and the spring characteristics was changed, pressure and current distribution was not uniformed. The carbon brush and spring was beaten frequently and alarm information was not found in time and so on. The slip-ring and carbon brush temperature were rosen rapidly so that the ring of fire was formed anaooeoeoooeaaada burmed sofdy and melted so that was caused generator slip-ring burmed, for the se tradition the
coresponding measures were taken. The generator is running normally now. Key words: Generator; Slip-ring: Air duct blocked
0引言
大型发电机是电力系统中的关键设备,近年来随着其额定电压和容量的不断提高,大型发电机在运行过程中受到更多的电、热机械应力及环境因素的影响,这些因索就会直接或间接的使高电压定子绝缘的一些薄弱环节产生局部放电,导致电机出现故障。据国外文献报道大型机组的日
收稿日期:2012-03-[1
修订日期:2012-04-05
作者简介:段爱霞(1973-),女,华北水利水电学院,讲舞,工
学强士,主要研究充方向为发电系统暂能控制研究。
万方数据
停机损失可超过25万美元,若事故大修为80天,则不包括修理费用的停机损失至少为2000万美元。本文以信阳华豫电厂#2发电机发生滑环烧
损事故为例分析发电机滑环烧损事故。设备结构和参数(1
某电厂报发电机是东方电机厂制造的300MW 发电机,冷却型式为水氢氢,该型发电机是东方厂的主力机型,技术上已相当成熟。发电机的铭牌参数如表1下: