IEEE 1588多端口从钟技术研究

Research on IEEE 1588 Multiport Slave Clock Technology

IEEE 1588标准为新一代智能变电站基于网络的测量和控制系统提供了一种完全基于通信网络的精密时钟协议(Precision Time Protocol,PTP)。该协议支持冗余主钟,并且对于主钟之间的动态切换有比较详尽的规定,但是却没有关于多端口冗余的从钟的描述。文章利用PTP的现有技术,提出了一种基于IEEE 1588多端口冗余的从钟同步系统设计方法,实验结果表明,该方法能够快速、择优在从钟之间动态切换,最大限度地保证系统时钟同步的精度和可靠性。

IEEE 1588 standard provides the networked measurement and control systems with a method of precision time protocol （PTP） based on their communication network. PTP supports redundancy master clock and defines the master clock dynamic switching in detail. But this protocol doesn＇t provide further information about multiport redundancy slave clock. This paper utilizes the current IEEE 1588 technology in a novel way, proposes a system design method of multiport redundancy slave clock synchronization system based on the IEEE 1588 standard. Test results have proven that the proposed method can realize fast and selective slave clock switching, and ensure the precision and reliability of the clock synchronization to a great extent.