基于时钟同步的变电站电能计量回路数据高精度采集方法  

High Precision Data Acquisition Method of Substation Electric Energy Metering Loop Based on Clock Synchronization

作　　者：孟晨 MENG Chen(State Grid Shaanxi Electric Power Co.,Ltd.,Xixian New Area Power Supply Company,Xianyang 712000,China)

机构地区：[1]国网陕西省电力有限公司西咸新区供电公司,陕西咸阳712000

出　　处：《通信电源技术》2023年第23期37-39,共3页Telecom Power Technology

摘　　要：由于变电站电能计量回路结构复杂,导致数据采集流程烦琐,且传统的采集方法精度较低。为解决该问题,提出一种基于时钟同步的变电站电能计量回路数据高精度采集方法,建立了一个由主节点、从节点和数据中心构成的变电站电能计量回路无线传感采集网络。即将校准主节点时钟作为参考基准并引入全数字双混频鉴相器(Digital Dual Mixer Time Difference,DDMTD)技术,以确定主从时钟的相位差。通过相位的动态移动,主从时钟能够细同步采集变电站电能计量回路数据。采用所提设计方法采集某变电站电能计量回路数据时,数据采集的平均绝对误差为0.014%。Because of the complex structure of substation electric energy metering circuit,the data acquisition process is complicated,and the traditional acquisition method has low accuracy.In order to solve this problem,this paper puts forward a high-precision data acquisition method of substation electric energy metering loop based on clock synchronization,and establishes a wireless sensor acquisition network of substation electric energy metering loop composed of master node,slave node and data center.That is to say,the calibrated master clock is used as a reference and the technology of Digital Dual Mixer Time Difference(DDMTD)is introduced to determine the phase difference between master and slave clocks.Through the dynamic movement of phase,the master-slave clock can collect the data of substation electric energy metering circuit in fine synchronization.The average absolute error of data acquisition is 0.014%when the method designed in this paper is used to collect the data of electric energy metering circuit of a substation.

关 键 词：时钟同步 变电站 电能计量回路 数据高精度采集 

分 类 号：TM933.4[电气工程—电力电子与电力传动]