Title :
The effect of space charges on conduction current in polymer by modified PEA method
Author :
Hwang-bo, Seung ; Yun, Do-Hong ; Yi, Dong-Young ; Han, Min-Koo
Author_Institution :
Dept. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
Direct measurement of space charge and conduction current was carried out on low-density polyethylene degraded by ultraviolet radiation using a pulsed electro-acoustic (PEA) method. Dominant heterocharges were formed near both electrodes by high voltage application and was found to be deeply trapped. In this paper, the effect of temperature and electric field reversal on the detrapping and trapping of space charges was investigated and the role of space charge in electrical conduction was discussed quantitatively. The main mechanism for detrapping and trapping of space charges was the Poole-Frenkel model
Keywords :
electric breakdown; electric current measurement; electrical conductivity measurement; insulation testing; polyethylene insulation; space charge; LDPE; Poole-Frenkel model; conduction current; electric field reversal; insulation breakdown tests; low-density polyethylene; polymeric insulation; pulsed electro-acoustic test method; space charges detrapping; space charges trapping; temperature effects; ultraviolet radiation degradation; Charge measurement; Current measurement; Degradation; Electrodes; Polyethylene; Polymers; Pulse measurements; Pulsed electroacoustic methods; Space charge; Voltage;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549436
