摘要
针对变电站导线电流分布不平衡导致故障的问题,提出了一种盲源诊断法。首先使用基于非侵入式无芯和非接触式霍尔传感器的监测系统感应所有导线周围的磁通密度;其次利用磁通密度与电流之间的方程式来估计每根导线中的电流;再次将电流与热额定值进行比较,确定电流分布是否均匀;最后根据电流分布情况决定是否触发报警。实验结果表明,该方法能够正确检测导线电流分布情况,具有非常好的适用性。
Aiming at the problem of fault caused by unbalanced current distribution in substation conductors,a blind source diagnosis method is proposed.Firstly,a monitoring system based on the non-invasive coreless and contactless Hall sensor is used to sense the magnetic flux density around all wires.Secondly,the equation between magnetic flux density and current is used to estimate the current in each wire.Thirdly,the current is compared with the thermal rating to determine whether the current distribution is uniform.Finally,according to the current distribution,whether to trigger the alarm is decided.The experimental results show that the proposed method can detect the current distribution of the conductor correctly,and has a very good applicability.
作者
谭庆科
郑利彪
王丽蓉
TAN Qing-ke;ZHENG Li-biao;WANG Li-rong(Maintenance Company of State Grid Hunan Electric Power Co.,Ltd.,Changsha 410004,China;Anhui NARI Jiyuan Electric Power Grid Tech.Co.,Ltd.,Hefei 230088,China)
出处
《信息技术》
2021年第3期66-72,共7页
Information Technology
基金
南瑞集团有限公司项目(8000-201918445A-0-0-00)。
关键词
电流分布
盲源分离
霍尔效应
实时监测
故障诊断
current distribution
blind source separation
Hall effect
real-time monitoring
fault diagnosis
