基于PTP的時間同步系統(tǒng)可用性分析及優(yōu)化策略
孫曉明,孫中尉,牛得存
(山東電力工程咨詢院有限公司,山東 濟南 250013)
摘 要:基于網(wǎng)絡的IEEE 1588 時間同步協(xié)議(PTP),是適應未來智能變電站關鍵應用要求的精確時間同步方式。提出了一種利用故障樹分析對PTP 可靠性進行量化評估的方法,對IEEE PC37.238 推薦的PTP 網(wǎng)絡結構可用性進行理論計算,分析影響PTP 對時可靠性的關鍵因素,對已建系統(tǒng)可靠性進行量化評估,并提出了PTP 網(wǎng)絡時延和PTP 對時網(wǎng)絡的架構優(yōu)化策略,提高了IEEE 1588 時間同步系統(tǒng)的可用性。
關鍵詞:時間同步;IEEE 1588;可靠性;故障樹分析;網(wǎng)絡拓撲
中圖分類號:TM63;TM76 文獻標識碼:A 文章編號:1007-3175(2017)04-0061-07
Availability Analysis and Optimization Strategy for Time Synchronization
System Based on Precision Timing Protocol
SUN Xiao-ming, SUN Zhong-wei, NIU De-cun
(Shandong Electric Power Engineering Consulting Institute Corp., Ltd, Jinan 250013, China)
Abstract: The IEEE 1588 precision timing protocol (PTP) is the recommended means of providing precise timing synchronization mode for the key application of future substations. This paper presented a kind of quantitative assessment method of PTP reliability using fault tree analysis, carried out theoretical calculation for the usability of PTP network structure recommended by IEEE PC37.238, analyzed the key factors impacting on PTP precision timing reliability and carried out quantitative assessment for the built system reliability. The PTP network delay and the framework optimizing strategy of PTP precise timing network were raised to improve the availability of IEEE 1588 time synchronization system.
Key words: time synchronization; IEEE 1588; reliability; fault tree analysis; network topology
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