基于采样序号的同步调整方法

章简要分析了几种常用的同步调整方法，提出了一种基于采样序号的同步调整方法，并对该方法进行精度分析。该方法十分适合采样率高的保护装置，由于它不需修改采样中断定时器，仅通过对齐两侧采样序号来调整两侧采样时刻，因而具有简单易行、同步误差小、采样间隔均匀、系统稳定性好等优点。

Synchronous Adjustment Method Based on Sampling Sequence Number

Synchronous adjustment of line current differential protection is the crucial technology for realizing the digital current differential protection. This paper briefly analyzes some kinds of general synchronous adjustment methods, and puts forward a kind of synchronous adjustment method based on sampling sequence number, and carries out the precision analysis for the method. This method is very much suitable for the protective device with high rate sampling, since it needs not to modify sampling interruption timer, only adjusts the sampling time of two sides through alignment of the sampling sequence number of two sides, so it has the advantages, such as easy to use, little synchronous error, even sampling intervals, good system stability and etc.. This method has been applied in the digital and optical current differential protection based on 32 DSP, which is developed by Xuchang Electric Protection Group.