输电线路避雷器全生命周期状态在线监测方法

On Line Monitoring Method for Whole Life Cycle State of Transmission Line Arrester

为降低因避雷器导致的电力事故发生概率、保证输电线路安全平稳地运行,以全生命周期为切入点,提出避雷器状态在线监测方法。针对氧化锌材质避雷器,分析设备全生命周期中各个阶段状态情况。然后针对泄漏电流与加载电压模拟信号实施快速傅里叶离散化处理,将信号从时域转换成频域,并获取阻性电流基波分量与奇次谐波分量,从而实现对避雷器状态在线监测。仿真实验环节主要检测监测免疫性,经电磁波干扰与表面温度等试验环节,验证该方法能够有效抑制电磁波与正常设备表面温度的负面影响,且实时性较好。

In order to reduce the probability of electric power accidents caused by lightning arresters and ensure the safe and stable operation of transmission lines,this study takes the whole life cycle as the breakthrough point and proposes an online monitoring method of lightning arresters.The status of each stage in the whole life cycle of the zinc oxide arrester is analyzed.Then the Fast Fourier dis-cretization is carried out for the leakage current and the loading voltage analog signal,the signal is converted from the time domain to the frequency domain,and the fundamental wave component and the odd harmonic component of the resistive current are ob-tained,so as to realize the status of the lightning arrester online monitoring.The simulation experiment is mainly to detect and moni-tor immunity.Through experiments of electromagnetic interference and surface temperature,the method can effectively suppress the negative influence of electromagnetic wave and normal equipment surface temperature,and has good real-time performance.