绝缘油直流击穿试验影响因素分析

Analysis of Influencing Factors of DC Breakdown Test for Insulating Oil

对换流变压器及高压电器等使用的绝缘油分别进行直流击穿电压试验,并对试验过程中的各个影响因素进行分析。结果表明:绝缘油种类不同所得的直流击穿电压不同,直流电压的极性和电极形态对绝缘油的直流击穿电压有影响,升压速率对绝缘油直流击穿电压影响较大,升压速率提高,其击穿电压也随之增大,试验温度对绝缘油直流击穿电压有一定的影响,在一定的温度范围内,试验温度越高,其击穿电压越高。

DC breakdown voltage tests were carried out on the insulating oils used in converter transformers and high voltage electrical equipment, and the influencing factors during the test process were analyzed. The results show that the DC breakdown voltages of different types of insulating oils are different, the polarities and electrode morphologies of DC voltage have effects on the breakdown voltages of the insulating oils. The boost rate has great influence on DC breakdown voltage of insulating oil, the breakdown voltage increases as the boost rate increases. The test temperature has a certain effect on the DC breakdown of insulating oil, in a certain temperature range, the higher the test temperature, the greater the breakdown voltage.