基于虚拟仪器的电力电缆故障测距仪的研究

电力电缆埋藏于地下,运行环境复杂,因此进行电缆的故障诊断比较困难.文章分析了现有测距设备的不足和测距方法存在误差的原因,并设计了基于虚拟仪器的电力电缆故障智能测距仪.此测试系统充分利用高级语言的强大功能和Windows编程风格;并引入小波变换和相关分析方法对故障信号进行分析以实现故障的自动测距.试验结果表明,此系统可提高故障测距的正确性和精度.

RESEARCH OF CABLE FAULT LOCATION EQUIPMENT BASED ON VIRTUAL INSTRUMENT

Because the power cable is buried in the ground and its running environment is complicated, so the diagnosis of cable fault location is very difficult. The authors analyzed the shortage in both existing fault location equipments and methods, and a virtual instrument based power cable fault location intelligent equipment was designed. In this system the powerful function of high-level language and programming style of MS-Windows were fully utilized, at the same time the wavelet transform and correlation analysis methods were used to analyze the fault signal to implement the automatic fault location. Test results show that the correctness and accuracy of fault location can be improved by the presented system.