Influence of acid value on recovery voltage parameters of transformer oil-paper insulation system
Xiaojia Wang · Dianli zidonghua shebei · 2013
A simplified model of transformer is set up to research the influence of acid value on recovery voltage parameters. 25# transformer oil and ordinary cellulose paper are used as oil-paper composite insulation in aging experiment and results show that,the relationship between the acid value of insulating paper and the aging time is a linear function while that between the acid value of transformer oil and the aging time is an exponential function;along with the increase of insulating paper acid value,the maximum recovery voltage increases linearly,the central time constant decreases exponentially and the initial slope increases exponentially.