Pulsar Based Timing for Grid Synchronization
Pulsar Based Timing for Grid Synchronization
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DOI：
10.1109/tia.2021.3057352
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发表时间：
2021-05
影响因子：
4.4
通讯作者：
W. Qiu;H. Yin;Liang Zhang;Xiqian Luo;Weikang Wang;Yilu Liu;Wenxuan Yao;L. Zhan;P. Fuhr;Thomas J King
中科院分区：
文献类型：
--
作者：
W. Qiu;H. Yin;Liang Zhang;Xiqian Luo;Weikang Wang;Yilu Liu;Wenxuan Yao;L. Zhan;P. Fuhr;Thomas J King
电网中现有的同步系统，如全球定位系统，由于网络攻击、电磁干扰等各种不可预测和不可控的因素，容易发生暂时性或永久性故障，从而影响所产生的授时信号的准确性和可靠性。本文提出了一种基于脉冲星天文的授时系统，以提供另一种同步信号。这种时钟将为电网应用程序提供显著的安全改进，例如依赖于精确定时信号的广域监控系统。详细描述了系统的硬件结构和软件结构。首先，设计了用于采集射电望远镜信号的高速采样硬件平台。在此基础上，提出了一种包括多相滤波器组、非相干消色散和滑动窗口折叠的三步周期脉冲提取方法。最后，通过三个实验验证了框架的有效性。给出了所产生的脉冲星定时脉冲，并讨论了影响其精度的因素。分析结果表明，脉冲星信号可以为电网同步提供高精度的定时脉冲。
Existing synchronization systems in the power grid, such as the global positioning system, are susceptible to temporary or permanent failures due to various unpredictable and uncontrollable factors such as cyber-attack and electromagnetic interferences, thus affecting the accuracy and reliability of generated timing signal. In this article, a pulsar astronomy-based timing system is proposed to provide an alternative synchronization signal. This clock will offer significant security improvements to power grid applications, such as a wide-area monitoring system, which depends on a precise timing signal. The hardware and software frameworks are described in detail. First, a high-speed sampling hardware platform is designed to collect signals from radio telescopes. Then a periodic pulse extraction method with three steps is proposed to process the pulsar signal, including polyphase filterbanks, incoherent de-dispersion, and sliding window folding. Lastly, three experiments are conducted to verify the effectiveness of the frameworks. The generated pulsar timing pulse is presented, and the factors affecting its accuracy are also discussed. The analysis results demonstrate that the pulsar signals can provide high-accurate timing pulses for grid synchronization.