数字化变电站合并单元自动误差校验技术及应用  

Merging unit automatic error verification technology and its application in digital substation

作　　者：王智 杨茂涛 杨静 孟卓[2] 唐璐[2] Wang Zhi;Yang Maotao;Yang Jing;Meng Zhuo;Tang Lu(Power Supply Service Center(Metric Center),State Grid Hunan Electric Power Co.,Ltd.,Changsha 410000,China;School of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]国网湖南省电力有限公司供电服务中心(计量中心),长沙410000 [2]湖南大学电气与信息工程学院,长沙410082

出　　处：《电测与仪表》2022年第8期133-138,共6页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技项目(5216A019000S)。

摘　　要：合并单元的准确性直接影响数字化变电站甚至智能电网的安全稳定运行。为此,文章从硬件设计和算法研究两方面着手提升合并单元误差校验准确度和实时性,详细给出了合并单元校验系统硬件设计原理,提出了基于最小旁瓣卷积窗的频谱相位校正算法,实现了合并单元比差和角差准确估计,建立了合并单元时钟误差校验方案,实现了时钟误差校验、守时功能测试和绝对延时计算。实验结果证明,文章设计的数字化变电站合并单元自动误差校验系统运行稳定可靠,满足实际测量需求。The accuracy of the merging unit directly affects the safe and stable operation of digital substations and even smart grids.Therefore,the accuracy and real-time performance of the merging unit error calibration are improved from two aspects of hardware design and algorithm research.The hardware design principle of the merging unit calibration system is given in detail,and the spectrum phase correction algorithm based on the minimum side lobe convolution window is proposed,which realizes the accurate estimation of the unit difference and angular difference of the merging unit.The clock error calibration scheme of merging unit is established,and the clock error check,punctual function test and absolute delay calculation are realized.The experimental results show that the automatic error calibration system of digital substation merging unit designed in this paper runs stably and reliably,and meets the actual measurement requirements.

关 键 词：合并单元 误差 校验 变电站 频谱校正 

分 类 号：TM935.1[电气工程—电力电子与电力传动]