车载式局部放电超高频检测系统定位方法
发布时间：2018-08-22 13:03
【摘要】：车载式局部放电超高频检测装置能够对敞开式变电站内所有高压设备进行局部放电监测与定位,及时排除故障,维持电网安全稳定运行。针对超高频局部放电检测定位准确度低的难点,提出了复小波变换滤波降噪结合高阶累积量的敞开式变电站局部放电超高频信号定位算法,在保留信号的幅值和相位特征下最大程度去除噪声干扰,基于仿真分析了结合高阶累积量计算了局部放电信号的时延,结果表明该方法有效提高了时延的计算准确度及定位准确性。现场应用表明该方法能有效计算超高频信号的时延,对局部放电位置实现空间定位,具有较强的可靠性与实用性。
[Abstract]:The vehicle-borne partial discharge ultra-high frequency (UHF) detection device can monitor and locate all the high voltage equipments in the open substation, remove the faults in time, and maintain the safe and stable operation of the power network. Aiming at the difficulty of low localization accuracy in UHF PD detection, a novel UHF location algorithm based on complex wavelet transform filter combined with high order cumulants is proposed. With the amplitude and phase characteristics of the reserved signal, the noise interference is removed to the maximum extent. Based on the simulation analysis, the delay of partial discharge signal is calculated by combining the high-order cumulant. The results show that this method can effectively improve the accuracy of time delay calculation and location. The field application shows that this method can effectively calculate the time delay of UHF signal and realize the spatial location of partial discharge. It has strong reliability and practicability.
【作者单位】： 广东电网公司电力科学研究院;武汉锐特星科技有限公司;
【分类号】：U463.6;TM76
[Abstract]:The vehicle-borne partial discharge ultra-high frequency (UHF) detection device can monitor and locate all the high voltage equipments in the open substation, remove the faults in time, and maintain the safe and stable operation of the power network. Aiming at the difficulty of low localization accuracy in UHF PD detection, a novel UHF location algorithm based on complex wavelet transform filter combined with high order cumulants is proposed. With the amplitude and phase characteristics of the reserved signal, the noise interference is removed to the maximum extent. Based on the simulation analysis, the delay of partial discharge signal is calculated by combining the high-order cumulant. The results show that this method can effectively improve the accuracy of time delay calculation and location. The field application shows that this method can effectively calculate the time delay of UHF signal and realize the spatial location of partial discharge. It has strong reliability and practicability.
【作者单位】： 广东电网公司电力科学研究院;武汉锐特星科技有限公司;
【分类号】：U463.6;TM76
【参考文献】
相关期刊论文 前5条
1 许中荣;唐炬;张晓星;孙才新;;应用复小波变换对电力变压器局部放电超高频信号去噪研究[J];电力自动化设备;2008年01期
2 侯慧娟;盛戈v，
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