计及小信号稳定的智能电表通信故障同步诊断方法  

Synchronous Fault Diagnosis Method for Smart Electricity Meter Communication with Small Signal Stability

作　　者：芮光辉 薛晓慧 马晓琴 李炜东 于洋洋 刘庚 RUI Guanghui;XUE Xiaohui;MA Xiaoqin;LI Weidong;YU Yangyang;LIU Geng(Marketing Department,State Grid Qinghai Electric Power,Xining 810008,China;Communication Company,State Grid Qinghai Electric Power,Xining 810008,China;State Grid Siji Ziguang(Qingdao)Microelectronics Technology Co.,Ltd.,Beijing 100081,China)

机构地区：[1]国网青海省电力公司营销部,青海西宁810008 [2]国网青海省电力公司信通公司,青海西宁810008 [3]国网思极紫光(青岛)微电子科技有限公司,北京100081

出　　处：《机械制造与自动化》2024年第1期250-254,共5页Machine Building & Automation

摘　　要：因受到电表内部小信号稳定性的干扰,故障诊断准确性较低,提出一种计及小信号稳定的智能电表通信故障同步诊断方法。根据智能电表中RS-485通信芯片的结构电路,分析智能电表通信过程,建立智能电表通信故障分析树,利用网络层有向图的形式分析智能电表故障通信连接情况,同步诊断智能电表通信故障,对智能电表通信故障同步诊断中涉及到的小信号进行滤波,去除噪声,优化智能电表通信故障同步诊断结果。实验结果表明:在学习率一定的情况下,设计方法的损失值较低,诊断准确率更高;在学习率改变的情况下,设计方法的诊断准确率在0.005时达到最高。智能电表通信故障诊断过程同步性得到保证,可为智能电表的智能应用提供理论参考。To address the low accuracy of fault diagnosis caused by the interference of small signal stability in meter,a communication fault synchronous diagnosis method of intelligent meter considering small signal stability is proposed.According to the structure circuit of RS-485 communication chip in smart meter,the communication process of smart meter is analyzed,the communication fault analysis tree of smart meter is established,the fault communication connection of smart meter is studied in the form of network layer directed graph,the communication fault of smart meter is diagnosed synchronously,the small signals involved in the synchronous diagnosis of communication fault of smart meter are filtered to remove noise,and the synchronous diagnosis results of communication faults of smart meters are optimized.The experimental results show that when the learning rate is certain,the loss value of the design method is lower and the diagnosis accuracy is higher;when the learning rate changes,the diagnostic accuracy of the design method reaches the highest at 0.005,which ensures the synchronization of intelligent meter communication fault diagnosis process,and provides a theoretical reference for the intelligent application of intelligent meter.

关 键 词：小信号 电表通信故障 故障树 通信连接 学习率 

分 类 号：TM743[电气工程—电力系统及自动化]