摘要
本文提出了能有效检测 XL PE电缆绝缘水树老化状态的超低频方波 -工频电压叠加法新技术 ,对含水树 XLPE电缆分别施加单极性方波和正负对称方波电压叠加工频电压所产生的响应电流特性进行了实验研究 ,找出了最佳叠加工频电压值 .最后对产生超低频方波 -工频电压叠加电流响应的机理及其检测的影响因素进行了探讨。
An ultra\|low frequency square wave(ULFSW) and power frequency voltage(PFV) superposition method for detecting water treeing degradation of XLPE cable insulation is proposed.The current responses of water treeing degraded XLPE cable insulation under square wave of single polarity and double polarities are measured respectively. It is found that there is an optimum value of power voltage as the square\|wave voltage is fixed.Finally the mechanism of current responses under ULFSW\|PFV superposition voltage is analyzed and the disturbing factors in measurement are discussed.
出处
《电工电能新技术》
CSCD
2000年第3期27-31,共5页
Advanced Technology of Electrical Engineering and Energy
关键词
XLPE电缆
水树老化
超低频方波-工频叠加法
绝缘
XLPE cable
water\|tree degradation
ultra\|low square\|wave
response current
mechanism
