110 kV主变套管污秽缺陷的诊断分析与处理 Diagnostic Analysis and Treatment of 110 kV Main Transformer Bushing Pollution Defect.pdfVIP
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60 刘益军等:110 kV 主变套管污秽缺陷的诊断分析与处理 绝缘材料 2013 ,46(1)
110 kV 主变套管污秽缺陷的诊断分析与处理
刘益军,王 岩,李 慧,苗银银
(广东电网公司佛山供电局,广东 佛山 528000)
摘要:在变电站高压设备巡视中通过红外检测发现运行中的110 kV 主变压器套管局部发热异常。综合应用
红外、紫外成像和超声波局放检测技术诊断瓷套管存在裂纹或污秽缺陷。停电检查套管发现其表面积污严
重,部分伞裙有明显的放电痕迹。分析认为引起发热和局部放电异常的原因是瓷套管表面污秽受潮。对瓷
套管表面进行喷涂PRTV 涂料处理后,套管带电检测数据正常,消除了套管缺陷,并提出了防污闪的建议。
关键词:套管;红外成像;发热;放电;污秽
中图分类号:TM407 文献标志码:A 文章编号:1009-9239(2013 )01-0060-04
Diagnostic Analysis and Treatment of 110 kV Main
Transformer Bushing Pollution Defect
Liu Yijun, Wang Yan, Li Hui, Miao Yinyin
(Foshan Power Supply Bureau of Guangdong Power Grid Company, Foshan 528000, China)
Abstract: An operating 110 kV transformer bushing was found abnormal local heating by infrared detec-
tion in the inspection of transformer substation equipment; and crack or pollution defects were indicated
in the porcelain bushing through comprehensive diagnoses of infrared, ultraviolet imaging and ultrasound
PD detection technique. The surface of the bushing was found seriously polluted, and part of the umbrel-
la skirt had obvious discharge tracks. It is analyzed that heating and partial discharge are caused by the
porcelain bushing ’s surface pollution and wetness. After spraying PRTV coating on the porcelain bushing
surface, the charged detection data restore normal condition and the defects are eliminated. Some anti-pol-
lution suggestions are then put forward.
Key words: bushing; infrared imaging; heating; discharge; pollution
0 引 言 段,对运行中存在污秽缺陷的高压设备在发生闪络
每年电力系统由于污秽造成的闪络事故占总 前通过监测声、光、电信号进行诊断,效果良好且操
事故的比例较大,且污闪事故严重影响电力系统正 作方便,避免了一起主变套管闪络事故。
常运行,易造成大面积停电,各电力企业都非常重
视防污闪工作。对变电站输变电设备的防污闪电
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