基于滑动去趋势波动分析的触电特征检测方法  

Electric Shock Feature Detection Method Based on Moving Detrended Fluctuation Analysis

作　　者：郭峰 李天友 叶荣 陈和洋 GUO Feng;LI Tianyou;YE Rong;CHEN Heyang(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;College of Electrical Engineering and Automation,Xiamen University of Technology,Xiamen 361024,China;Fuzhou Power Supply Company of State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350009,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]厦门理工学院电气工程与自动化学院,福建厦门361024 [3]国网福建省电力有限公司福州供电公司,福建福州350009

出　　处：《供用电》2020年第4期65-70,共6页Distribution & Utilization

摘　　要：针对低压配电网的剩余电流保护装置无法识别触电特征,提出了一种基于去趋势波动分析的触电特征检测方法。采用滑动去趋势波动分析算法分别计算触电前、触电时、触电后不同区间的标度指数,基于标度指数的变化趋势可实现触电特征的检测。通过单相触电实验和仿真分析,验证了方法的有效性。该方法具有抗噪性强,不受剩余电流幅值、触电方式影响的特点,为剩余电流保护装置的改进提供一个新思路。Aiming at the fact that electric shock feature cannot be identified by the residual current protection device of the low-voltage distribution network,an electric shock feature detection method based on moving detrended fluctuation analysis is proposed.The moving detrended fluctuation analysis algorithm is used to calculate the scale indexes of different intervals before,during and after an electric shock.The detection of electric shock feature can be realized based on the trend of the scale index.The effectiveness of the method was verified by single-phase electric shock experiments and simulation analysis.The method has strong anti-noise performance,not affected by residual current amplitude and electric shock mode,and provides a new idea for the improvement of residual current protection device.

关 键 词：低压配电网 剩余电流保护装置 滑动去趋势波动分析 标度指数 触电特征 

分 类 号：TM72[电气工程—电力系统及自动化]