电力电缆接头运行中的实时监测

Power cable junctions temperature monitored on line

对电缆接头故障进行了一些有益的分析 ,给出了以接头温度来间接换算接头电阻以及外皮绝缘老化的在线估计算法 ,较好地解决了接头电阻无法直接测量和绝缘老化不好直接观察的问题。设计出了以性能可靠的工控机为核心的监测系统 ,具有温度越限报警、定时打印等功能。

In this paper,We do some instructive analysis on the fault of electrical power cable junctions,and give out the idea of converting the juncture point temperature into the juncture resistance and the idea of evaluating the aging of the insulation by the accumulating temperature raising time in which the direct juncture resistance measurement and the direct survey of the insulation aging are avoided.A monitor system with industrial computer is given,which has the functions of alarming and printing when the temperature overstep the boundary.By practice the reliability and the credence of the principle and the idea has been confirmed.