基于线性阻抗谱的配电电缆接头受潮缺陷检测

Detection of Damp Defect of Distribution Power Cable Joint Based on Linear Impedance Spectrum

对电缆接头受潮缺陷的检测既需判定被测电缆线路是否存在接头受潮的情况,还需对受潮接头进行定位分析,因而配电电缆接头受潮的问题一直困扰着电力系统的运维人员和相关研究学者。通过线性阻抗谱技术开展电缆接头受潮缺陷的检测,首先基于理论和仿真分析了线性阻抗谱技术识别电缆阻抗变化的原理,然后通过现场试验验证了线性阻抗谱技术在配电电缆接头受潮缺陷检测与定位方面的有效性。

The detection of cable joint damp defects not only needs to determine whether the tested cable line has joint damp,but also needs to locate and analyze the damp joint.Therefore,the problem of distribution cable joint damp has been perplexing the operation and maintenance personnel and relevant research scholars of power system.In this paper,the detection of damp defects of cable joints is carried out by linear impedance spectrum.Firstly,the principle of identifying cable impedance change by linear impedance spectrum technology is analyzed based on theory and simulation,and then the effectiveness of linear impedance spectrum technology in detecting and locating damp defects of distribution cable joints is verified by field experiments.