CAJ | 학술논문

设计了基于超声波、超高频及高频电流3种检测方法的局部放电在线监测系统，在硬件上采用多路信号的同时采集，从而增强了局部放电判定的可靠性。快采慢读数据采集方案，降低了系统的硬件成本。多传感器采集方案更加适用于不同电力设备放电检测。研究了超声定位时延的计算，采用基于FFT的互相关函数法实现了放电点的精确定位。经现场试运验证，设计的系统完全可实现放电信号的提取与定位，并在监控主机上实时显示放电波形与趋势。
설계료기우초성파、초고빈급고빈전류3충검측방법적국부방전재선감측계통，재경건상채용다로신호적동시채집，종이증강료국부방전판정적가고성。쾌채만독수거채집방안，강저료계통적경건성본。다전감기채집방안경가괄용우불동전력설비방전검측。연구료초성정위시연적계산，채용기우FFT적호상관함수법실현료방전점적정학정위。경현장시운험증，설계적계통완전가실현방전신호적제취여정위，병재감공주궤상실시현시방전파형여추세。
This paper introduced a partial discharge on-line insulation monitoring system based on ultrasonic, ultrahigh frequency and high frequency current technology.Using the multiple signals input in hardware thereby enhancing the reliability of partial discharge determination.Rapid data collection and slow reading scheme, reduces the hardware cost of the system.Multi-sensor collection scheme is more suitable for different power equipment discharge detection.The system research on time-delay of ultra-sonic singles and realize the ultrasonic location by use the cross-correlation function method based on FFT.After field verification, system can realize the extraction and location of discharge signal and display the waveform and trend of discharge in the monitoring host instantly.