Title :
Space charge characteristics of HTV silicone rubber after corona aging
Author :
Meixin Luo ; Youping Tu ; Cong Wang ; Gaofeng Ying
Author_Institution :
Beijing Key Lab. of High Voltage & EMC, North China Electr. Power Univ., Changping, China
Abstract :
The space charge characteristics of polymers can be used as an effective means of assessing the aging degree of polymeric materials. In this paper, corona aging test of silicone rubber has been carried out based on the orthogonal test method. Pulsed Electro-Acoustic (PEA) method is used to measure the distribution of space charge of the samples after aging. According to the measurement results, it can be observed that the current peak of the space charge distribution curve increases with the deepening of aging. Using the PEA space charge density as a test index, the range analysis and variance analysis results both show that corona voltage has the maximum significance on the test index, followed by the aging time, while the relative humidity with the minimum significance. Combined with the hydrophobicity test and SEM analysis, the conclusion can be obtained that the recovery of hydrophobicity has a lower speed and serious holes and traps appear on the surface gradually with the deepening of aging.
Keywords :
corona; high-temperature techniques; hydrophobicity; scanning electron microscopy; silicone rubber; silicone rubber insulators; space charge; vulcanisation; HTV silicone rubber; PEA; SEM analysis; aging time; corona aging; high temperature vulcanisation; hydrophobicity test; orthogonal test method; polymeric materials; pulsed electro-acoustic method; range analysis; relative humidity; space charge characteristics; space charge density; space charge distribution curve increases; test index; variance analysis; Aging; Corona; Electrodes; Humidity; Materials; Rubber; Space charge;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena (CEIDP), 2011 Annual Report Conference on
Conference_Location :
Cancun
Print_ISBN :
978-1-4577-0985-2
DOI :
10.1109/CEIDP.2011.6232595