Fault Simulation and Early Characteristics of Tail Moisture in Oil-Immigrated Paper Bushing
Dai Quanmin1,2, Qi Bo1,2, Li Chengrong1,2, Zhuo Ran3, Fu Mingli3
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China; 2. Beijing Key Laboratory of High Voltage and Electromagnetic Compatibility North China Electric Power University Beijing 102206 China; 3. EPRI of China Southern Power Grid Guangzhou 510080 China
Abstract：In order to study the diagnosis and detection methods of insulation moisure for oil-impregnated paper(OIP) bushing, an OIP model with transparent sheaths was designed and a microinjection device was adopted to put deionized water into OIP model along top inner wall. The partial discharge(PD), dissipate factor, capacitance and frequency domain spectroscopy were measured after tail moisture in OIP bushing. The results presented that the capacitance was increasing with the moisture time under rated voltage ,instead of no change of tanδ and PD.The tendency of tanδ at0.001 Hz had an increasing trend for tail moisture bushing. PD might occur under 1.5 times rate voltage after tail moisture in OIP. It has the possibility of misjudgment for the moisture deposition of bushing by traditional measurement.It is suggested that the both PD under 1.5 times rate voltage and FDS should be addedfor suspected moisture bushing in off-line test.And the mearsurement of capacitance in online test should be added in order to diagnose the tail mosture of bushing earily.
戴佺民, 齐波, 李成榕, 卓然, 傅明利. 油浸纸套管尾部受潮故障模拟及早期特征[J]. 电工技术学报, 2018, 33(11): 2613-2619.
Dai Quanmin, Qi Bo, Li Chengrong, Zhuo Ran, Fu Mingli. Fault Simulation and Early Characteristics of Tail Moisture in Oil-Immigrated Paper Bushing. Transactions of China Electrotechnical Society, 2018, 33(11): 2613-2619.
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2018, Vol. 33 
