随着智能变电站技术的发展,数字信号的采集与传输必须基于统一的时序和时钟标准,才能保证数据的准确性、实时性和有效性,IEEE1588技术在新一代智能变电站中发挥着重要作用.系统地分析了IEEE1588协议的系统结构、报文类型以及PTP透明时钟工作原理.突出介绍了P2P和E2E的两种对时方案的异同点,并总结了IEEE1588工业以太网交换机报文处理流程.该文设计的1588交换机具有精度高、易配置、经济实用等优点,可以满足电力系统对时同步的技术要求.%With the development of the intelligent substation technology, the collection and the transmission of digital signal must be based on unified timing sequence and clock standards to ensure the accuracy, real-time performance, and effectiveness of the data. IEEE1588 clock synchronization technology plays an important role in a new generation of intelligent substation. In this paper, the PTP technology defined in IEEE1588 is analyzed. The system architecture and message classes of the PTP system are studied in detail. It mainly introduces similarities and differences between P2P and E2E. IEEE1588 clock synchronization plan has many advantages of high-accuracy, simple configuration, low cost and so on. It can satisfy the technical requirements of time synchronism in power system.
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