| 引用本文: | 路遥,江汉红,王义.用于船舶综合电力系统同步测量的高精度PTP混合时钟同步方法[J].电力自动化设备,2019,39(1): |
| LU Yao,JIANG Hanhong,WANG Yi.A high-precision PTP hybrid clock synchronous method for synchronous measurement of ship integrated power system[J].Electric Power Automation Equipment,2019,39(1): |
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| 摘要: |
| 为了满足船舶综合电力系统同步测控亚微秒级的精度要求，通过分析各种时钟同步协议的优缺点和传统时钟同步方法对船舶同步测量的局限性，提出一种基于IEEE1588协议的卫星时钟同步与时钟同步频率补偿算法相结合的混合时钟同步方案以实现同步测量。所提方案以环星型拓扑结构的交换式以太网为背景，基于集成IEEE1588协议功能的以太网收发器设计了同步测量节点，并研究了一种频率补偿算法，可以动态地对时钟节点的晶振频率进行补偿，使时钟具有良好的守时性，保证了主从时钟的偏差恒定。通过仿真分析和试验对同步偏差性能进行测试，结果显示同步精度维持在±200 ns以内，达到了IEC61850关于同步测量的标准，满足了船舶综合电力系统时间同步的需要。 |
| 关键词: 船舶综合电力系统；PTP IEEE1588协议；同步测量；频率补偿算法；IEC61850；混合时钟同步 |
| DOI：10.16081/j.issn.1006-6047.2019.01.032 |
| 分类号:TM935;TP29 |
| 基金项目: |
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| A high-precision PTP hybrid clock synchronous method for synchronous measurement of ship integrated power system |
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LU Yao, JIANG Hanhong, WANG Yi
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National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan 430033, China
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| Abstract: |
| In order to meet the accuracy requirement of sub-μs level in ship integrated power system synchronous measurement, a hybrid clock synchronous scheme combined with the satellite clock synchronization based on IEEE1588 protocol and the clock synchronous frequency compensation algorithm is proposed, which is based on the analysis of the advantages and disadvantages of each clock synchronous protocol and the limitations of traditional clock synchronous methods. Setting the interactive Ethernet with circular-star topology structure as the background, the synchronous measurement nodes are designed based on the Ethernet transceiver integrated with IEEE1588 protocol, and a frequency compensation algorithm is proposed to compensate the crystal frequency of clock nodes dynamically, which can ensure the clock good punctuality and constant deviation between master clock and slave clock. The synchronization deviation performance is tested by simulation analysis and experiment, results show that the synchronization precision maintains within ±200 ns, meeting the synchronous measurement standard of IEC61850 and the requirements of ship integrated power system for synchronization. |
| Key words: ship integrated power system PTP IEEE1588 protocol synchronous measurement frequency compensation algorithm IEC61850 hybrid clock synchronous |
