电力系统SDH网络非对称路径PTP对时策略  

PTP strategy for asymmetric path in the SDH network of a power system

作　　者：赵忠明[1] 韩亮 胡炯[1] 王华[1] ZHAO Zhongming;HAN Liang;HU Jiong;WANG Hua(Beijing Sifang Automation Corporation Limited,Beijing 100084,China)

机构地区：[1]北京四方继保自动化股份有限公司,北京100084

出　　处：《电力系统保护与控制》2021年第9期150-157,共8页Power System Protection and Control

基　　金：国家社科基金项目资助“高维复杂面板数据的双惩罚分位回归建模方法研究”(17BJY210)。

摘　　要：为了解决电力系统SDH通信链路延时非对称性引起的PTP网络对时精度较差的问题,根据SDH网络的特征以及IEEE1588对时标准,介绍了SDH网络如何选择合适的PTP对时模式,提出一种新的非对称路径下PTP路径延时补偿策略。根据该策略,并相应研发了一套对时装置,给出了应用方案。进行三天拷机测试,对时精度1μs以内。测试结果证明,SDH网络通信路径不对称延时补偿之后,PTP对时精度提高很多,满足智能变电站设备对时要求。There is a problem of poor timing accuracy on a PTP network caused by the asymmetry of SDH communication delay in a power system.Adopting the characteristics of an SDH network and the IEC-61588 standard,this paper introduces a method to choose the appropriate PTP time synchronization mode for the SDH network,and presents a new PTP path delay compensation strategy for asymmetric paths.Using this strategy gives the application scheme with the PTP clock devices.After a three-day test,the time synchronization accuracy is within 1us.As is shown in the test results,the PTP timing accuracy on PTP network is much improved,and meets the time synchronization requirements for an intelligent substation.

关 键 词：SDH网络 PTP IEEE1588 网络时间同步 非对称路径 路径延时 

分 类 号：TM73[电气工程—电力系统及自动化]