基于正弦曲线的数字化变电站采样值数据缺失的修正方法  

作　　者：尹建丰 施爱博[1] 季海涛[1] 朱佳伟[1] 

机构地区：[1]江苏林洋电子股份有限公司,江苏启东226200

出　　处：《自动化与仪器仪表》2014年第1期116-118,共3页Automation & Instrumentation

摘　　要：在数字化变电站中,由于网络传输质量而引起的数字量输入采样数据丢失是影响电能计量准确度的重要因素。而传统的线性插值、二次拉格朗日插值、曲线拟合等数据修正方法在计算精度和计算资源上无法同时满足计量装置的需求。本文利用采样值数学模型推导出了一种基于正弦曲线的插值方法。通过实验数据比对分析,使用该方法设计的软件算法占用计算资源较小,并可以显著地降低网络数据传输过程中丢帧所带来的误差影响,提高数字化变电站电能表的电能计量精度。In digital substation, the loss of sampled value caused by the quality of network transmission is an important factor in the accuracy of electric energy measurement. The methods of linear interpolation, Lagrange interpolation and curve fitting are not ap-propriate to the metering device because of the computational accuracy and the computing resource. This paper introduces an inter-polation method which is extrapolated based on the mathematical model of sampled value. The analysis of the experimental results shows that the method can deduce the margin of error caused by the data loss and improve the accuracy of measurement.

关 键 词：数字化变电站 IEC61850-9-2 丢帧 插值 正弦曲线 

分 类 号：TM933[电气工程—电力电子与电力传动]