復合絕緣子帶電檢測技術研究及應用現(xiàn)狀
李世林1，李特2，張湘3
1 永嘉縣供電局，浙江 永嘉 325100； 2 浙江省電力公司電力科學研究院，浙江 杭州 310014； 3 自貢電業(yè)局，四川 自貢 643000
摘 要：隨著復合絕緣子在電力系統(tǒng)中的廣泛應用，其引發(fā)的事故逐漸增加，通過帶電檢測技術實時檢測絕緣子狀態(tài)顯得極為重要。總結了復合絕緣子憎水性和局部缺陷的帶電檢測技術，包括憎水性指示函數(shù)法、紅外法等方法，對各種技術的檢測原理、適用范圍及優(yōu)缺點進行了對比分析，在此基礎上，介紹了復合絕緣子帶電檢測前沿技術。結果表明，憎水指示函數(shù)法在特征量的選擇和提取等方面尚需進一步研究；電場法適用于高電壓等級絕緣子狀態(tài)檢測；光纖傳感器法能發(fā)現(xiàn)芯棒局部缺陷；激光誘導熒光法適用面廣、檢測距離遠，值得進行深入研究并應用于工程實際。
關鍵詞：復合絕緣子；帶電檢測；局部缺陷；憎水性
中圖分類號：TM855 文獻標識碼：A 文章編號：1007-3175(2013)06-0007-04
Research and Application Status of Live Detection Technique for Composite Insulator
LI Shi-lin1, LI Te2, ZHANG Xiang3
1 Yongjia Power Supply Bureau, Yongjia 325100, China; 2 Z(P)EPC Electric Power Research Institute, Hangzhou 310014, China; 3 Zigong Electric Bureau, Zigong 643000, China
Abstract: With the increasing application of composite insulators in power system, the faults caused by composite insulator defects raise gradually in recent years, so using live detection techniques to detect the conditions of composite insulators is vital to assure the safety of transmission line. This paper summarized the live detection techniques of hydrophobicity and local defects of composite insulators, including the hydrophobicity function, infrared image and so on. Analysis was made to the detection principle, application scope and merits and demerits of these methods. On this basis, introduction was made to the advanced technologies of composite insulator live detection. The results show that there is a need for further research on the choosing and extracting characteristic parameters of hydrophobicity function method; the electric field method is suitable for high-voltage level power lines; the optical fiber sensor method can detect local defects in time; the laser-induced fluorescence (LIF) method has advantages such as good adaptability and large distance detecting ability, which are worthy of further study and applied to the field. Key words: composite insulator; live detection; local defect; hydrophobicity
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