油纸电容型套管常见缺陷及对策

Common Defects of Oil-Paper Capacitive Bushing and Countermeasures

油纸电容型套管以其良好的绝缘性能在电力系统中得到广泛应用,我国110 k V及以上电压多采用油浸式电容型套管。变压器套管是连接变压器绕组和导线的重要部件,对高压引线起绝缘支撑作用,其绝缘性能对变压器的可靠供电和安全运行意义重大。近年来因套管电容芯子缺陷引起的变压器事故频繁发生,对电力系统的安全稳定构成严重威胁,因此对油纸电容型套管电容芯子缺陷进行分析具有重要意义。针对油纸电容型套管电容芯子常见故障类型展开分析,并制定对策,为油纸电容型套管的故障诊断、运行维护提供参考。

Oil-paper capacitance bushing is widely used in power system because of its good insulation performance.In China,oil-immersed capacitance bushing is mostly used in 110 kV and above voltage.Transformer bushing is an important component connecting transformer windings and lines.It plays an insulating supporting role for high voltage leads.Its insulation performance is of great significance for reliable power supply and safe operation of transformers.In recent years,transformer accidents caused by the defect of bushing capacitance core occur frequently,which poses a serious threat to the safety and stability of power system.Therefore,fault analysis on oil-paper capacitance bushing capacitance core is of great significance.The common fault types of oil-paper capacitance bushing capacitance core are analyzed,and the corresponding strategies are formulated to provide reference for fault diagnosis,operation and maintenance of oil-paper capacitance bushing.