摘要
变压器内部产生的超高频(UHF)电磁波信号在传播过程中,有很多因素会影响传感器所检测到的信号波形和能量。为了研究影响因素与UHF信号的关系,构建了变压器仿真计算的物理模型,并用时域有限差分法计算变压器内局部放电产生的UHF信号,通过分析UHF电磁波信号的幅值和能量累积曲线,研究了绕组和铁心、检测点与激励源间的距离、检测点附近不同金属导体位置等因素对UHF信号的影响。该研究结果有助于对UHF信号传播特性的理解以及提高信号检测的准确度。
Many factors affect the propagation of uhra high frequency （UHF） signals caused by partial discharge （PD） on the waveforms and energy of signals in transformer. To investigate the relationshi Pof factors and UHF signals, simulation model of transformer for PD study are established. UHF signals in simulation model of transformer caused by PD are calculated using finite difference time domain method. By means of amplitude and cumulative energy plot of simulation signals, and combing the measured result,the following factors：distance between PD source and detection position, different metallic conductor position around detection position and iron core and winding are researched, which contribute to comprehend the propagation characteristic of UHF signals and detect UHF signals accurately.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第5期70-74,共5页
Journal of Chongqing University
基金
重庆市自然科学基金重点项目(2006BA3018)
关键词
变压器
局部放电
超高频
时域有限差分法
transformer
partial discharge
ultra high frequency
finite difference time domain
