基于DSP和在线FCE高压容性设备绝缘性能在线监测装置  

On-line monitoring device for insulation performanceof high-voltage capacitive equipment based on DSP and on-line FCE

作　　者：刘志坚[1] 赵浩益 梁宁[1] 何蔚 Liu Zhijian;Zhao Haoyi;Liang Ning;He Wei(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650504,China)

机构地区：[1]昆明理工大学电力工程学院,云南昆明650504

出　　处：《电子技术应用》2020年第7期88-93,98,共7页Application of Electronic Technique

基　　金：云南省人培基金(KKSY201904013)。

摘　　要：目前变电站高压容性设备的绝缘检测大多采用定期、离线的实验检测方法,针对该方法存在的时效性差、精度不高的问题,提出一种基于DSP的高压容性设备绝缘在线监测装置,同时结合模糊评价算法实现对数据的实时分析和在线评估。首先针对绝缘性能监测原理和方法,讨论了快速傅里叶变换FFT在谐波分析法中的应用,通过增加汉宁窗的方法改进传统FFT变换存在的局限性;然后建立基于层次分析法的绝缘性能多参量模糊评价模型;接着对装置软硬件部分实现作了设计,包括信号ADC采样、FFT处理、SCI通信和HMI对话等单元;最后在高压实验室对装置进行测试。结果表明,装置在实时获取设备运行参数同时实现数据在线分析,给出设备的绝缘情况,具有一定的实际应用价值。At present,the insulation testing of high-voltage capacitive equipment in substation mostly adopts regular and off-line experimental testing methods.And this method has some problems such as poor timeliness and low precision.This paper presents an on-line monitoring device for insulation of high-voltage capacitive equipment based on DSP.Firstly,the application of Fast Fourier Transform(FFT)in harmonic analysis is discussed according to the principle and method of insulation performance monitoring,and the limitation of traditional FFT transform is improved by adding Hanning Window.Then the multi-parameter fuzzy evaluation model of insulation performance based on analytic hierarchy process is established.Then the hardware and software part of the device is designed,including signal ADC sampling,FFT processing,SCI communication and HMI dialogue and other units.Finally,the device is tested in the high-voltage laboratory,and the results show that the device can obtain the running parameters of the equipment in real time and analyze the data online at the same time.

关 键 词：容性设备 绝缘监测 数字信号处理器 快速傅里叶变换 模糊分析 

分 类 号：TM933[电气工程—电力电子与电力传动]