Open AccessResearch on the Failure Process of Oil Paper Insulation of Surface Partial Discharge under Fluctuating DC voltage
Author(s) -
Bin Xie,
Wan Yilun,
T. T. Lei,
Suqing Wu,
Zhan Shi
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/512/1/012122
Subject(s) - partial discharge , arc flash , voltage , transformer , electrical engineering , high voltage , materials science , reliability (semiconductor) , transformer oil , mechanical engineering , automotive engineering , forensic engineering , engineering , power (physics) , physics , quantum mechanics
Partial discharge along the surface seriously damages the oil-paper insulation performance and ultimately leads to insulation failure, which greatly reduces the safety and reliability of the converter transformer operation. It is important to understand the failure process of oil-paper insulation under partial discharge along the surface to avoid fault occurrence. In this paper, the failure process of oil-paper insulation under partial discharge of pulsating DC and AC voltage is studied. A partial discharge test platform for oil-paper insulation under pulsating DC voltage was built. The partial discharge test of oil-paper insulation along the extremely uneven electric field was simulated by using the needle plate and column plate discharge model. The oilpaper insulation under two kinds of voltages under the extremely uneven electric field was analyzed in depth. The similarities and differences of the failure process and their causes, the insulation design and operation and maintenance recommendations for preventing flashover under the extremely uneven electric field are proposed.