考虑电压采集电磁信号干扰的氧化锌避雷器在线监测  

On⁃line Monitoring of Zinc Oxide Arrester Considering Electromagnetic Signal Interference in Voltage Acquisition

作　　者：李宝银 吴宏亮 龚子豪 LI Baoyin;WU Hongliang;GONG Zihao(Guoneng Hebei Dingzhou Power Generation Co.,Ltd.,Hebei Dingzhou 073000,China;Baoding Tongwei Electric Power Technology Co.,Ltd.,Hebei Baoding 071000,China)

机构地区：[1]国能河北定州发电有限责任公司,河北定州073000 [2]保定同为电力科技有限公司,河北保定071000

出　　处：《高压电器》2024年第2期156-162,共7页High Voltage Apparatus

基　　金：国家能源集团河北公司科技基金(河北定州电厂(2021)327号)。

摘　　要：为实时监测氧化锌避雷器运行状态,提出考虑电压采集电磁信号干扰的氧化锌避雷器在线监测方法。利用经验模态分解方法去除原始电压信号中的电磁噪声,消除电磁干扰;利用谐波分析法对电压与电流信号实施快速傅里叶变换操作,简化运算,获取避雷器的阻性、基波阻性以及三次谐波电流,由此判定氧化锌避雷器运行状态。实验证明:该方法可以有效去除电磁噪声以及无用信息,保留了有效信息,测量误差也未超过0.25%,能够有效监测出氧化锌避雷器的运行状态。For monitoring the operating status of Zinc oxide surge arrester in real⁃time,an online monitoring method for Zinc oxide surge arrester considering the interference of voltage acquisition electromagnetic signals is proposed.The empirical mode decomposition method is used to remove electromagnetic noise from the original voltage signal and eliminate electromagnetic interference.The harmonic analysis method is used to implement the fast Fourier transform operation on the voltage and current signals,simplify the operation,obtain the resistance,fundamental wave resistance and third harmonic current of the lightning arrester,and thus determine the operating status of the Zinc oxide lightning arrester.The experiment proves that this method can effectively remove electromagnetic noise and useless information,retain effective information and the measurement error does not exceed 0.25%.It can effec⁃tively monitor the operating status of Zinc oxide lightning arrester.

关 键 词：电压采集 电磁干扰 氧化锌避雷器 谐波分析法 离散频谱校正 

分 类 号：TM862[电气工程—高电压与绝缘技术]