电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2012年
12期
82-87
,共6页
黎锐烽%曾祥君%李泽文%王阳
黎銳烽%曾祥君%李澤文%王暘
려예봉%증상군%리택문%왕양
IEEE%1588协议%智能变电站%通信网络%路径延时误差%区分服务调度模型
IEEE%1588協議%智能變電站%通信網絡%路徑延時誤差%區分服務調度模型
IEEE%1588협의%지능변전참%통신망락%로경연시오차%구분복무조도모형
IEEE 1588 protocol%smart substation%communication network%path time-delay error%diffserv-based packetsscheduling model
IEEE 1588同步时钟基于TCP/IP技术,采用变电站通信网络对时,受通信网络传输阻塞的影响,存在同步报文传输路径延时误差。文中分析了IEEE 1588时钟同步精度误差;提出了基于区分服务调度模型的同步报文路径延时误差修正方法,通过设置网络节点业务报文队列的优先级,建立了带宽调节因子和紧迫度机制,确定了同步报文的时延,并提出时钟发生器振荡频率的修正方法;实现IEEE 1588同步时钟误差的修正。搭建了高精度网络时钟硬件平台,并完成了测试。实验结果表明,该时钟实现了纳秒级网络对时,能够满足智能变电站IEC 61850标准对时间精度的要求。
IEEE 1588同步時鐘基于TCP/IP技術,採用變電站通信網絡對時,受通信網絡傳輸阻塞的影響,存在同步報文傳輸路徑延時誤差。文中分析瞭IEEE 1588時鐘同步精度誤差;提齣瞭基于區分服務調度模型的同步報文路徑延時誤差脩正方法,通過設置網絡節點業務報文隊列的優先級,建立瞭帶寬調節因子和緊迫度機製,確定瞭同步報文的時延,併提齣時鐘髮生器振盪頻率的脩正方法;實現IEEE 1588同步時鐘誤差的脩正。搭建瞭高精度網絡時鐘硬件平檯,併完成瞭測試。實驗結果錶明,該時鐘實現瞭納秒級網絡對時,能夠滿足智能變電站IEC 61850標準對時間精度的要求。
IEEE 1588동보시종기우TCP/IP기술,채용변전참통신망락대시,수통신망락전수조새적영향,존재동보보문전수로경연시오차。문중분석료IEEE 1588시종동보정도오차;제출료기우구분복무조도모형적동보보문로경연시오차수정방법,통과설치망락절점업무보문대렬적우선급,건립료대관조절인자화긴박도궤제,학정료동보보문적시연,병제출시종발생기진탕빈솔적수정방법;실현IEEE 1588동보시종오차적수정。탑건료고정도망락시종경건평태,병완성료측시。실험결과표명,해시종실현료납초급망락대시,능구만족지능변전참IEC 61850표준대시간정도적요구。
IEEE 1588 synchronous clock realized with TCP/IP is used for communication networks timing in substations. The path time-delay error of synchronous message is caused by the communication network transmission congestion. The precision error of IEEE 1588 clock synchronization is analyzed, and the correction methods of path time-delay error of synchronous message are proposed with the diffserv-based packets scheduling mod~l. The bandwidth adjustment factor, pressing degrees mechanism and the time-delay of the synchronous message is determined through setting of network node service message priority. Then the correction methods of oscillation frequency of clock generator are presented. The IEEE 1588 synchronization clock error is thus corrected. Finally, the high precision network clock hardware platform is built. Experiment results show that the clock has the synchronization precision of nanosecond, and it can satisfy the time synchronization precision requirement of smart substations of IEC 61850 Std.
