摘要
针对配电网变电站、变压器和馈线对应关系混乱的问题,充分利用工频信号能够穿透变压器的特点,提出了一种基于噪声预处理工频信号检测算法,在无需过零点同步信号的情况下,对线变关系进行识别。这既减小硬件开销,又降低现场设备部署难度。同时,通过对线路噪声进行估计和归一化处理,提高了工频信号识别精度。该方法在Altera公司的FPGA芯片中实现,消耗硬件资源小于芯片总资源的8%。最后,基于FPGA芯片研制的线变识别装置样机在江苏进行了试点,现场测试结果表明,所提出的算法可以准确的识别线变关系。
For the confusion of the corresponding relations among substations,transformers and feeders in distribution network,this paper makes full use of the characteristics of power frequency signals that can penetrate transformers,and proposes a power frequency signal detection algorithm based on noise pre-process,which identifies the linetransfomer relations without zero-crossing synchronous signals.This not only reduces the hardware overhead,but also decreases the difficulty of field equipment deployment.At the same time,the identification accuracy of power frequency signal is improved by estimating channel noise and normlization.This method is implemented in Altera FPGA chip,which consumes less than 8%of total chip resources.Finally,the developed system was measured in JiangSu Province and the field measurement results show that the proposed algorithm can accurately identify the line-transformer relation.
作者
朱红
高鸿坚
张明
罗兴
周冬旭
Zhu Hong;Gao Hongjian;Zhang Ming;Luo Xing;Zhou Dongxu(Nanjing Power Supply Branch of State Grid Jiangsu Electric Power Co.,Ltd,Nanjing 210008,China;Global Energy Interconnection Research Institute Co.,Ltd,Beijing 102209,China;State Grid Key Laboratory of Electric Communication Network Technology,Beijing 102209,China)
出处
《电子测量技术》
2020年第11期142-147,共6页
Electronic Measurement Technology
基金
国网江苏省电力有限公司2018年科技项目(J2018064)资助
关键词
线变识别
工频通信
噪声预处理
FPGA
line-transformer identify
power frequency communication
noise pre-process
FPGA
