电缆阻抗检测方法与设备的研究  

Research on Cable Impedance Detection Method and Equipment

作　　者：陶文清 胡文丽 魏诗雨 TAO Wenqing;HU Wenli;WEI Shiyu(Electric Power Engineering,Nanjing Institute of Technology,Nanjing 210061,China)

机构地区：[1]南京工程学院电力工程学院,江苏南京210061

出　　处：《电工技术》2023年第11期128-130,共3页Electric Engineering

基　　金：南京工程学院科技创新基金项目(编号TB202204022)。

摘　　要：对于电缆阻抗的测量,传统的单臂和双臂电桥方法存在精度低、误差大、可测量电阻的范围较小的缺点。为使测量的数据更加精确,研究了LCR测试仪和自动电桥平衡原理与模型。使用Multisim软件进行仿真模拟,将仿真结果与实际阻抗进行误差分析。结果表明,针对测量YJV 10 kV电缆的阻抗,在10 km长度以上,两个模型的误差都在0.4%以下,具有较高的精确度,而在1~10 km以内,自动电桥平衡模型明显更优,误差在2%以下。For the measurement of cable impedance,traditional single-arm and dual-arm bridge methods have the disadvantages of low accuracy,large error,and small range of measurable resistance.In order to make the measured data more accurate,the principle and model of LCR meter and automatic balance bridge are studied.The Multisim software is used for simulation,and the error analysis between simulation results and actual value is carried out.The results show that for measuring the impedance of YJV 10 kV cable,the error of both models is below 0.4%at a length of 10 km,which has high accuracy,while within 1~10 km,the automatic bridge balancing model is significantly better with an error of less than 2%.

关 键 词：电缆 阻抗检测 LRC测试仪 自动电桥平衡 

分 类 号：TM930[电气工程—电力电子与电力传动]