摘要
传统对于线路局部放电的检测是使信号通过空气进行传播,传播衰减大,不容易检测到局放信号,本文对线路中微小局部放电信号的检测提供一种新的方法,通过建立多物理场耦合模型,运用有限元法分析局放信号传播特性,探究信号通过绝缘杆传播的可行性,针对不同频率的信号在环氧树脂中不同的环境温度下的衰减进行仿真,通过研究发现信号在环氧树脂中传播受温度影响较小,且频率越高衰减越大,但高频率信号依然能够传输到绝缘杆的末端,结果为使用绝缘杆作为局部放电信号的传播介质是可行的提供依据。
Traditional detection of partial discharge in power lines involves transmitting signals through air,which suffers from significant propagation attenuation,making it difficult to detect partial discharge signals.This paper proposes a novel method for detecting minor partial discharge signals in power lines.By establishing a multiphysics coupled model and employing the finite element method to analyze the propagation characteristics of partial discharge signals,the feasibility of signal transmission through insulating rods is investigated.Simulations are conducted on the attenuation of signals at different frequencies under varying environmental temperatures in epoxy resin.The study reveals that signal propagation in epoxy resin is less affected by temperature,with higher frequencies exhibiting greater attenuation.However,high-frequency signals can still be transmitted to the end of the insulating rod.These findings provide evidence supporting the feasibility of using insulating rods as a medium for partial discharge signal propagation.
作者
李科林
梁仕斌
Li Kelin;Liang Shibin(Yunnan Electric Test and Research Institute(Group)Co.,Ltd,Kunming 650217,China)
出处
《云南电力技术》
2025年第6期82-86,共5页
Yunnan Electric Power
关键词
环氧树脂
局部放电
有限元
超声波
Epoxy resin
Partial discharge
Finite element
Ultrasonic wave
