提高变电站继电保护设备SNTP对时精度的方法

Methods to Improve the Substation Relay Protection Equipment SNTP Time Synchronization Accuracy

当电力系统继保、测控装置由于现场实际情况只能使用SNTP对时模式时,SNTP对时精度将成为其应用的一大障碍,通常现场只要求SNTP对时装置侧误差不大于10 ms,但在网络条件比较可靠时,其可通过软件处理实现相对基准时钟源1 ms误差的标准,提高SNTP对时的应用范围,降低对时系统的建设成本。

Because of the actual situation,when the power system relay protection and control device can only be used when the SNTP mode,SNTP time synchronization accuracy will become a major obstacle to its application.Usually the site requires only SNTP on the fashion side error is not greater than10 ms.However,when the network condition is reliable,it can realize the standard of the 1 ms error of the relative reference clock source,which improves the application of SNTP time synchronization system and reduces the construction cost.