基于自激法的非接触式CVT介质损耗测量装置研究  

Research on CVT dielectric loss measuring device based on self-excitation with non-contact mode

作　　者：王振宇[1] 苏咏梅[1] WANG Zhenyu;SU Yongmei(Zhengzhou Technical College,Zhengzhou 450121,China)

机构地区：[1]郑州职业技术学院,河南郑州450121

出　　处：《现代电子技术》2017年第14期183-186,共4页Modern Electronics Technique

基　　金：河南省高等学校重点科研项目应用研究计划(16B413007)

摘　　要：CVT能否正常可靠运行直接影响到整个电力系统的稳定性,为实时监测CVT的绝缘状态,提出了基于自激法的非接触式CVT介损测量系统。通过非接触式测量平台对电压电流波形同步采样,并由无线Wi Fi模块将所测得电参量传输至PC端,在Lab VIEW软件平台上用谐波分析法进行电压电流信号的处理并计算得出介质损耗参数tanδ。该方法可以有效测出CVT各部分电容器的介损值和电容值,同时能够可视化电压电流参量,用于长期监测CVT绝缘状态,在实际的介损测试中可以隔离高压,有较高的安全性和可靠性。The normal operation of CVT affects the stability of the whole power system directly.A CVT dielectric loss measuring system based on self-excitation with non-contact mode is presented in this paper.CVT′s voltage and current waveformsare sampled synchronously by non-contact measuring platform.The wireless WiFi module is used to transmit the measured electrical parameters to the PC side.The harmonic analysis method is adopted to process the voltage and current signals on LabVIEW software platform,and the dielectric loss parameter(tanδ)is obtained by calculation.The test result shows that this methodcan effectively detect the dielectric loss and capacitance values of each capacitor in the CVT,display the voltage and current parameters,and can be used to measure the long-term insulating state of CVT.It can isolate the high voltage in the actual dielectric loss measurement,and has high safety and reliability.

关 键 词：在线检测 介质损耗测量 电容式电压互感器 非接触式测量装置 

分 类 号：TN98-34[电子电信—信息与通信工程]