文章摘要
朱炎平,陆俊,徐志强,等.智能变电站IEEE1588同步时延优化方法[J].电力系统自动化. DOI: 10.7500/AEPS20170512010.
ZHU Yanping,LU jun,徐志强, et al.An IEEE1588 Synchronization Time-delay Optimization Method for Smart Substation[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20170512010.
智能变电站IEEE1588同步时延优化方法
An IEEE1588 Synchronization Time-delay Optimization Method for Smart Substation
DOI:10.7500/AEPS20170512010
关键词: 1588协议  时间同步  时延抖动  智能变电站
KeyWords: IEEE1588  time synchronization  time-delay jitter  smart substation
上网日期:2018-05-10
基金项目:国家电网公司科技项目(SGHNJY00JHQT1500092基于IEC61588对时的网络传输时延标记技术研究))
作者单位E-mail
朱炎平 华北电力大学电气与电子工程学院
国网湖南省电力有限公司岳阳供电分公司 
1561869775@qq.com 
陆俊 华北电力大学电气与电子工程学院 lujun@ncepu.edu.cn 
徐志强 国网湖南省电力公司经济技术研究院 xu8282836@163.com 
王凯亮 华北电力大学电气与电子工程学院 541172319@qq.com 
摘要:
      针对智能变电站时间同步过程中通信网络的路径时延抖动导致同步精度下降问题,提出一种基于IEEE1588时间同步协议的时延优化方法。首先分析智能变电站环境下路径时延抖动同步误差过程,实现同步误差产生机理的量化分析;然后阐述所提出的同步时延优化方法,方法在1588协议框架下实现从时钟的基本时钟补偿基础上,拓展时延测量机制获取路径时延抖动的时钟补偿最佳估计值,实现从时钟同步时间的二次时钟补偿,减少路径时延抖动对同步精度影响;最后以智能变电站中典型IEEE1588协议端到端透明时钟同步模式搭建仿真实验验证所提方法。实验结果表明所提方法能够提高智能变电站中从时钟同步精度和稳定性。
Abstract:
      In the time-synchronization process of smart substation, there is one noteworthy problem that the paths’ delay-jitter in the time-synchronization communication network may cause the degradation of the synchronization precision. To solve the problem above, this paper proposed an IEEE1588synchronization time-delay optimization method. Firstly, this paper analyzed the course of the synchronization’s error caused by paths’ delay-jitter in the environment of smart substation, which aimed to implement the quantitative analysis of the synchronization’s error mechanism. Secondly, based on the framework of IEEE1588 protocol, the proposed method was depicted to operate the second time’s compensation using an optimal estimation of paths’ delay-jitter, which was calculated by a time-delay extending measurement mechanism to compress the synchronization’s influence from paths’ delay-jitter. And finally an experiment is implemented based on the typical end-to-end transparent clock synchronization mode of IEEE1588 protocol in intelligent substation to verify the proposed method. The simulation results show that the proposed method may achieve better time-synchronization performance in terms of precision and stability for slavery-clocks in smart substation.
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