基于时间同步技术的新型远方终端单元设计  

A Novel RTU Based on Time Synchronization

作　　者：申屠刚[1] 钱钢[1] 杨贵玉[1] 江道灼[1] 吴文宣[2] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]福建省电力试验研究院,福建省福州市350007

出　　处：《电力系统自动化》2008年第15期45-48,107,共5页Automation of Electric Power Systems

摘　　要：传统远方终端单元(RTU)的非同步测量和数据传输延时是电力系统数据采集与监视控制(SCADA)系统数据误差的主要来源。提出了一种基于全球定位系统(GPS)和以太网时间同步技术的同步化RTU,以更低的成本实现类似于相量测量单元(PMU)的同步测量和数据快速回传。硬件主要由数据调理和采样电路、本地人机接口(MMI)、同步采样控制电路和以太网通信电路等部分构成。通过时钟同步、同步采样和同步时标处理等环节,同步测量单元(SMU)能够给上位机数据库提供高精度带时标的数据。设计兼顾了同步测量能力和成本,以便在系统中广泛配置。The main errors of the SCADA system stem from RTU＇s asynchronous measurement and the delay in data transmission.A synchronous measurement unit（SMU） is designed based on GPS and time synchronization on the Ethernet.It can realize data acquisition and real-time transmission simultaneously,just like PMU but costs less.It is composed mainly of the signals transformation circuit,man-machine interface（MMI）,control module and communication circuit.SMU is capable of providing highly accurate data with unified time label by such processes as clock synchronizing,synchronous sampling and synchronous time-marking.The design can be extensively configured for both synchronous measurement capability and low-cost.

关 键 词：数据采集与监视控制 远方终端单元 同步测量单元 同步采样 同步时标 

分 类 号：TM764[电气工程—电力系统及自动化]