PTP技术在智能变电站中的应用

Application of PTP Technology in Intelligent Substation

伴随着变电站自动化系统标准化、智能化、网络化、综合化的发展趋势,智能变电站要求在实现一次设备智能化、二次设备网络化的基础上,建立基于工业以太网的高精度、技术统一的时钟同步系统。因为网络时间协议的精度无法满足智能变电站的微秒级精度要求,所以支持IEEE1588(PTP技术)的工业以太网成为智能变电站时钟同步方式的首选。文章首先阐述IEEE1588(PTP技术)同步协议、时钟分类及同步原理,然后结合智能变电站通信网络结构和IEC61850标准的要求,介绍PTP技术在智能变电站的应用。通过边界时钟及透明时钟的方式,保障智能变电站通信网络时钟的高精度同步。

With substation automatic system trends in standardization, intelligentization, internetization and comprehensive operation, the smart substation prepare to build high-precision industrial Ethernet and technology unified clock synchronization system on the base of realizing intelligent primary equipment, networking secondary equipment. But the precision of network time protocol couldn＇t satisfy microsecond in intelligent substation, consequently, supporting IEEE1588 （PTP） in industrial Ethernet could be the best choice of clock synchronization in smart substation. This article first expounds the IEEE1588 （PTP） synchronous protocol, clock classification and principle of the synchronization. Then based on the smart substation communication network structure and requirements of IEC61850 standard, it introduces the application of PTP in smart substation. Through the methods of boundary clock and transparent clock, it guarantees the high-precision clock synchronization in smart substation communication network.