变电站监控系统NTP对时精度的提高策略  

Strategy for Improving NTP Timing Accuracy of Substation Monitoring System

作　　者：李照国 潘洪湘[1,2,3] 张婷 LI Zhaoguo;PAN Hongxiang;ZHANG Ting(NARI Group Corporation (State Grid Electric Power Research Institute),Nanjing 211106,China;NARI Technology Co.Ltd.,Nanjing 211106,China;State Key Laboratory of Smart Grid Protection and Control,Nanjing 211106,China)

机构地区：[1]南瑞集团公司(国网电力科学研究院),南京211106 [2]国电南瑞科技股份有限公司,南京211106 [3]智能电网保护和运行控制国家重点实验室,南京211106

出　　处：《浙江电力》2019年第1期82-85,共4页Zhejiang Electric Power

摘　　要：NTP(网络时间协议)在电力系统中应用广泛,具有应用成本低廉等优点,但对时精度一直相对较低。为进一步提高变电站监控系统NTP对时精度,在研究计算机时钟模型和时钟误差因素的基础上,对时间同步过程中的各个影响环节进行逐项分析,给出了时间采样流程,并对时间采样样本进行回归分析,计算出相差和频差,进而调用内核时间调整功能,实现了NTP对时精度的提高。The NTP(network time protocol)has been widely used in power system,the cost of which is low but the timing accuracy is not ideal.In order to improve the timing accuracy of the substation monitoring system and on the basis of combing the computer clock model and the clock error factor,the various influencing factors in the time synchronization process are analyzed item by item,and the time sampling process is given and subjected to regression analysis to calculate the phase difference and frequency difference,and then the kernel time adjustment function is adopted to improve NTP timing precision.

关 键 词：网络时间协议 时钟模型 时间采样 回归分析 对时精度 

分 类 号：TM764[电气工程—电力系统及自动化]