摘要
针对低压配电系统TN-C-S接线方式下,传统剩余电流保护装置存在灵敏度低、监测盲区范围大等问题,提出一种基于Hausdorff距离的漏电流故障监测方法。依托低压配电自动化系统,采用边缘计算的智能分布式代理模式实现漏电流监测。通过分析变压器出口至分支线间发生单相接地引起的漏电流故障时,故障点两侧剩余电流波形差异度特征,引入Hausdorff距离算法,其距离值表征相邻终端间剩余电流的差异程度,利用故障统一判据确定故障所在区段,其识别能力不受多种原因造成的下游正常剩余电流影响,并提高了监测灵敏度。仿真试验验证了该保护方案的正确性。
In view of such problems of traditional residual current protection device as low sensitivity and wide monitoring blind area at TN-C-S wiring mode of low-voltage distribution system,a kind of leakage current fault monitoring method based on Hausdorff distance is proposed.Based on the low-voltage distribution automation system,the leakage current monitoring is achieved by the intelligent distributed agent mode using the edge calculation.By analyzing the difference characteristic of residual current waveform on both sides of residual current in case of the leakage current fault due to single-phase to ground between the transformer outlet and the branch box,the Hausdorff distance algorithm is introduced and its distance value represents the difference degree of residual current between adjacent terminals.The fault section is determined by the unified fault judgment.Its recognition ability is free from downstream normal residual current due to various reasons and the monitoring sensitivity is improved.The correctness of the scheme is verified by the simulation test.
作者
牟浩东
王敬华
方善忠
王鹏玮
赵卫斌
MU Haodong;WANG Jinghua;FANG Shanzhong;WANG Pengwei;ZHAO Weibin(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255049,China;Shandong Kehui Power Automation Co.,Ltd.,Zibo 255087,China)
出处
《电力电容器与无功补偿》
2021年第5期189-195,共7页
Power Capacitor & Reactive Power Compensation
基金
南网科技项目(基于物联网技术的配电网故障监测与自愈控制系统研究与开发)。
