(图片有用)电缆接头尖刺缺陷局部放电发展过程的研究常文治.pdf

DOI:10.13334/j.0258-8013.pcsee.2013.07.026 33 7 Vol.33 No.7 Mar.5, 2013 192 2013 3 5 Proceedings of the CSEE ©2013 Chin.Soc.for Elec.Eng. 0258-8013 (2013) 07-0192-10 TM 835 A 470 40  (() 102206) Study on Development of Partial Discharges at the Defect Caused by a Needle Damage to a Cable Joint CHANG Wenzhi, LI Chengrong, SU Qi, GE Zhendong (State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University), Changping District, Beijing 102206, China) ABSTRACT: Insulation faults caused by the damages to the semi-conductive outer layer of silicon rubber prefabricated cable joints often occur. Studies on the partial discharges (PDs) development of such insulation defects, may help on the on-line 5 assessment of their severity. In this paper, a needle damage was made in a 35 kV prefabricated cable joint. The voltage applied to 3 the test object was raised step by step, which causes PDs and accelerates the deterioration of insulation. After the defect was 3 seriously deteriorated, a constant voltage was applied until insulation breakdown. During the tests, PDs were all recorded and analyzed. The trend of PD energy per unit time was obtained. The development of PDs was