油纸绝缘直流局部放电的研究

主要研究了油纸绝缘的直流局部放电规律。实验结果表明，放电重复率随温度、电压的增加而增加。常温下在电压降到接近零时，放电次数较多，随着时间的延长，放电逐渐减少到无放电；但在高温下，能看到明显的熄灭电压。

Study on Partial Discharge in Oil-Immersed Insulation Under DC Voltage

The rules of partial discharge in oil-immersed insulation under DC voltage are mainly studied.The test results show that the repetition rate of partial discharge increases along with temperature and voltage.At room temperature,the repetition rate is the largest when votlage decreases to approach zero and gradually decreases to zero with time lasted.But at higher temperature,PD extinction voltage is seen clearly.