摘要
IEC 61850中描述了过程层、间隔层、变电站层的数字化变电站结构,采用面向对象的思想对站内的数据采集、保护、控制、计量等功能进行划分,导致站内设备的时间同步要求发生改变。文章结合功能要求对数字化变电站设备的对时要求进行分析,根据设备的对时需求,提出基于SNTP的网络对时与基于秒脉冲的硬对时结合的对时系统结构。介绍SNTP网络对时在数字化变电站的数据交换以太网上实现的配置方法,对合并单元在秒脉冲校时条件下的采样控制方法进行分析,给出了数字化变电站全站同步系统实现的参考方案。
In IEC 61850,the digital substation is divided into process level,bay level and substation level.Because the functions such as data acquisition,protection,control,measurement and so on are defined object-oriented,it leads to altered time synchronization requests for substation equipment.This paper analyses the requirement of digital substation equipment on time synchronization,put forward a time synchronization system scheme based on SNTP and PPS（pulse per second）,introduces the configuration of SNTP realized in data exchange LAN in digital substation.The merging unit＇s sampling control method using PPS signal is also analyses and a referenced time synchronization system scheme is proposed in the paper.
出处
《电力系统通信》
2011年第1期28-32,共5页
Telecommunications for Electric Power System
关键词
数字化变电站
对时系统
SNTP
同步采样
Digital Substation
Time Synchronization System
SNTP
Synchronous Sampling
