基于虚拟仪器的过电压在线监测系统的设计与开发  

Design and Development of Overvoltage On-line Monitoring System Based on Virtual Instrument

作　　者：梁建锋[1] 李建芳[2] 李长元[2] 王永强[2] 

机构地区：[1]国网江西省宜春市供电公司,江西宜春336000 [2]华北电力大学输变电设备安全防御河北省重点实验室,河北保定071003

出　　处：《陕西电力》2015年第5期6-9,共4页Shanxi Electric Power

基　　金：国家高技术研究发展计划(863计划)(2012AA050802)资助

摘　　要：过电压在线监测技术一直是电网研究的重点。本文研制的监测系统的原理是对监测系统整体电压传输参数A(s)进行有理函数逼近,将频域电压信号U_4(s)与A(s)相乘,经Fourier反变换后得到电磁式电压互感器高压端口的电压信号。基于该原理,设计了硬件结构电路,并基于虚拟仪器技术开发了软件运行程序,在工业控制计算机上实现实时显示、保存和计算分析功能。高压实验室模拟试验及应用结果表明该系统工作稳定、测量准确,测试数据及过电压波形能真实反映电网过电压情况。The online monitoring of the overvohage is focused in the study of power system all the time. The principle of the system is to numerical fit the overall voltage transmission parameter A （s）of the monitoring system, multiply the frequency voltage signal U4（s ） and A （s）, then, the voltage signal of high pressure port of the voltage transformer is obtained after inverse Fourier transform. Based on this principle, the hardware circuit is designed, and based on the virtual instrument technology, software to run the program is developed.In the IPC, the software achieve real-time display, save and calculate analysis function. High voltage laboratory simulation experiments arid results show that the system is stable and accurate, and the test data and over-vohage waveform can reflect the overvohage condition.

关 键 词：过电压 在线监测 有理函数逼近 虚拟仪器技术 

分 类 号：TM86[电气工程—高电压与绝缘技术]