基于电流波形曲率的配电线路故障识别技术研究  

Research on Fault Identification Technology of Power Distribution Line Based on Current Waveform Curvature

作　　者：黄伟杰[1] 冯步锦 雷志涛 HUANG Wei-jie;FENG Bu-jin;LEI Zhi-tao(Jiangmen Power Supply Bureau of Guangdong Power Grid,Jiangmen 523000,China)

机构地区：[1]广东电网公司江门供电局,广东江门529030

出　　处：《电气开关》2024年第6期105-108,共4页Electric Switchgear

摘　　要：由于传统短路故障快速识别方法依赖于传感器数据的阈值检测或特征提取来判断故障的发生,导致识别精度及效率较低。因此提出基于电流波形曲率的配电线路故障识别技术研究。该方法通过对电流波形进行特征提取及曲率计算分析,根据电流波形曲线对配电线路故障进行了快速识别,通过等值网络分析得出了瞬时性故障阻抗特征和永久性故障阻抗特征。实验结果表明:在第6s时,所提出的配电线路故障分析方法成功地识别出了电压、电流和电阻的故障波动。故障识别时间始终低于10s,最长仅为8s,表明所提方法具有实用性。Because the traditional short-circuit fault rapid identification method relies on the threshold detection or feature extraction of the sensor data to judge the occurrence of the fault,the identification accuracy and efficiency are low.Therefore,the fault identification technology based on current waveform curvature is proposed.This method analyzes the feature extraction and curvature calculation of the current waveform,quickly identifies the distribution line faults according to the current waveform curve,and obtains the transient fault impedance characteristics and permanent fault impedance characteristics through the equivalent network analysis.The experimental results show that in the 6th s,the proposed distribution line fault analysis method successfully identified the fault fluctuation of voltage,current and resistance.The fault identification time is always less than 10s,and the longest time is only 8s,indicating the utility of the proposed method.

关 键 词：电流波形曲率 配电线路故障 等值网络 故障识别 

分 类 号：TM721.2[电气工程—电力系统及自动化]