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IEEE 1588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IEEE 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IEEE 1588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。
In the time synchronization process of smart substation,there is one noteworthy problem that the delay jitter of paths in the time-synchronization communication network may cause the degradation of the synchronization precision.Therefore,this paper proposed an IEEE 1588 synchronization time-delay optimization method.Firstly,this paper analyzes the course of the synchronizations error caused by delay jitter of paths in the environment of smart substation,which aims to implement the quantitative analysis of the synchronization error mechanism.Secondly,based on the framework of IEEE 1588 protocol,the proposed method is depicted to operate the second time＇s compensation using an optimal estimation of delay jitter of paths,which is calculated by a time-delay extending measurement mechanism to compress the synchronization＇s influence from delay jitter of paths.Finally,the proposed method is verified by an experiment based on the typical end-to-end transparent clock synchronization mode of IEEE 1588 protocol in smart substation.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.
作者
朱炎平
陆俊
徐志强
王凯亮
ZHU Yanping;LU Jun;XU Zhiqiang;WANG Kailiang(School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;Yueyang Power Supply Company, State Grid Hunan Electric Power Company Limited, Yueyang 414022, China;Economic Technology Institute Design Center, State Grid Hunan Electric Power Company Limited, Changsha 410004, China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2018年第12期148-153,共6页
Automation of Electric Power Systems
基金
国家电网公司科技项目(SGHNJY00JHQT1500092)~~
