数字化变电站光纤纵差保护性能分析

在数字化变电站使用电子式互感器的环境下，线路光纤差动保护面临很多新问题。这些问题的焦点集中在:如何与变电站内的母线保护、变压器保护共享数据源?如何实现变电站之间的数据采集同步?如何与变电站内的过程层装置进行互操作?等等。针对上述问题，提出了数字化变电站线路差动保护基于乒乓原理的时钟信号同步方案，并分析了基于该同步时差动保护性能和互操作的解决方案。

A Performance Analysis of Line Differential Protection in Digitized Substations

In the circumstance of electronic transformers used in a digitized substation,line differential protection faces many new problems,mainly those about the data sharing for the protection units,the synchronization of data sampling between two line differential protection units in different substations,the mutual operation of protection units with other units in the process layer.A solution for clock signal synchronization based on the Ping-Pang principle is proposed with an analysis made of a solution for the performance and mutual operation based on the synchronous clock differential protection.