高电压技术2011，Vol.37Issue(2)：310-317,8.
应用电站设备宽频特性的过电压在线监测装置
Online Over-voltage Monitoring Device Applying the Wide Frequency Characteristics of the Equipments in the Substation
摘要
Abstract
Several typical overvoltage on-line monitoring devices in China and abroad are analyzed and compared in detail,and a new method for over-voltage on-line monitoring based on wide frequency transmission parameters of the device is proposed. This method establishes a model by taking the potential transformer (TV), secondary cables and voltage divider as several two-port networks in cascade using their transmission parameters by means of rational function approximation. Adoption of this model can derive the over-voltage waveform of the high-voltage port of the TV from output voltage signals of the secondary device by means of discrete Fourier transform. Based on the principle, the hardware circuit of the monitoring system is devised and the software program of the system is designed. The over-voltage on-line monitoring system and the two-port transmission parameters model of the online over-voltage monitoring system are established based on the frequency domain measurements. The comparison between the calculated results and measured data verify the feasibility and validity of this method.关键词
过电压/在线监测/有理函数逼近/离散Fourier变换/传输参数/反演计算Key words
over-voltage/ on-line monitoring/ rational function approximation/ discrete Fourier transform/ transmission parameters/ inversion calculation分类
信息技术与安全科学引用本文复制引用
张重远,黄涛,任寅寅,王涛,梁贵书,唐帅..应用电站设备宽频特性的过电压在线监测装置[J].高电压技术,2011,37(2):310-317,8.基金项目
国家自然科学基金(50977031) （50977031）
河北省自然科学基金(E2008001243) （E2008001243）
中央高校基本科研业务费专项资金. （）
