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| Ultraviolet On-Line Monitoring System for Contaminated Insulators |
| Xiong Lan1, Liu Yu1, Yao Shuyou2, Yang Ji2, Zhang Zhanlong1, He Wei1 |
| 1. State Key Laboratory of Power Transmission Equipments & System Security and New Technology Chongqing University Chongqing 400030 China 2. Bishan Power Supply of Chongqing Electric Power Company Bishan 402760 China |
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Abstract Flashover of contaminated insulators along the transmission line took place frequently, which threats the safe operation of power system. Before flashover of contaminated insulators happens, the intensity of discharge pulse from their surface increases quickly, so does the ultraviolet light. Therefore, the intensity alteration in the specific range of UV wavelength can be monitored to reflect the contamination level of insulators. This paper introduces the theory of monitoring the discharge intensity of insulators by use of “solar-blind” UV sensor. Moreover, it shows the layout and picture in field of UV on-line monitoring system. The contamination level of insulator is correlated with the temperature, humidity and the working time besides the discharge intensity. In order to analyze the comprehensive effects of different factors, fuzzy synthesis evaluation method is applied to build an estimated model and an intelligent synthesis assessment system. The practical application in transmission line of Bishan city lasted half a year, and the analysis data demonstrated that the system has high reliability and fast response speed with low cost. Therefore, it is possible for wide application in late future.
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Received: 25 December 2009
Published: 04 March 2014
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[1] 顾乐观, 孙才新. 电力系统的污秽绝缘[M]. 重庆:重庆大学出版社, 1990.
[2] 朱虎, 李卫国, 林冶. 绝缘子检测方法的现状与发展[J]. 电瓷避雷器, 2006(6): 13-17.
[3] 杨奕, 陈以方, 洪玉萍, 等. 合成绝缘子的超声检测方法[J]. 无损检测, 2003, 25(7): 337-339.
[4] Suda T, Member S. Frequency characteristics of leakage current waveforms of a string of suspension insulators[J]. IEEE Transactions on Power Delivery, 2005, 20(1): 481-488.
[5] Naito K, Mizuno Y, Naganawa W. A study on probabilistic assessment of contamination flashover of high voltage insulator[J]. IEEE Transactions on Power Delivery, 1995, 10(3): 1378-1382.
[6] 戴利波. 紫外成像技术在高压设备带电检测中的应用[J]. 电力系统自动化, 2003, 27(22): 97-98.
[7] 何为, 陈涛, 刘晓明, 等. 基于紫外脉冲法的非接触式低值(零值)绝缘子在线检测系统[J]. 电力系统自动化, 2006, 30(10): 69-72.
[8] 汪金刚, 何为, 陈涛, 等. 绝缘子表面电场与紫外脉冲关系以及在劣化绝缘子检测中的应用[J]. 电工技术学报, 2008, 23(6): 138-142.
[9] 焦尚彬, 刘丁, 郑岗, 等. 基于模糊逻辑方法的高压绝缘子污秽程度评定[J]. 电力系统自动化, 2005, 29(7): 84-87.
[10] 栗秋华, 周林, 张凤, 等. 基于模糊理论和层次分析法的电力系统电压态势预警等级综合评估[J]. 电网技术, 2008, 32(4): 40-45. |
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2010, Vol. 25 
