A high-precision PTP hybrid clock synchronous method for synchronous measurement of ship integrated power system

被引：0
|
作者：
Lu Y. [1 ]
Jiang H. [1 ]
Wang Y. [1 ]
机构：
[1] National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 01期
关键词：
Frequency compensation algorithm; Hybrid clock synchronous; IEC61850; IEEE1588; protocol; PTP; Ship integrated power system; Synchronous measurement;
D O I：
10.16081/j.issn.1006-6047.2019.01.032
中图分类号：
学科分类号：
摘要：
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. © 2019, Electric Power Automation Equipment Press. All right reserved.
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页码：219 / 223
页数：4
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