Pulsar-Calibrated Timing Source for Synchronized Sampling
Pulsar-Calibrated Timing Source for Synchronized Sampling
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DOI：
10.1109/tsg.2021.3127396
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发表时间：
2022-03-01
影响因子：
9.6
通讯作者：
Liu, Yilu
中科院分区：
文献类型：
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作者：
Qiu, Wei;Yin, He;Liu, Yilu
全球定位系统（GPS）对相量测量单元（pmu）的实时同步采样至关重要。不幸的是，由于卫星信号弱和GPS欺骗等几个因素，GPS信号偶尔会不稳定，从而使PMU的采样性能下降。在这封信中，提出了一种新的脉冲星校准时序源（PTS）作为同步采样的备选时序源。PTS可在91分钟内产生漂移误差为1 μ s的定时信号，保证采样精度的连续性。实验结果表明，该方法对PMU同步具有较高的可靠性和准确性。
The Global Positioning System (GPS) is critical to the real-time synchronized sampling of phasor measurement units (PMUs). Unfortunately, GPS signals are occasionally unstable due to several factors such as weak satellite signal and GPS spoofing, thereby leaving the PMU with a degraded sampling performance. In this letter, a novel Pulsar-calibrated Timing Source (PTS) is proposed as the alternative timing source for synchronized sampling. The PTS can generate the timing signal with a 1 mu s drift error within 91 holdover minutes to ensure continuity of sampling accuracy. Experimental tests are conducted and the results reveal the reliability and accuracy of the PTS for PMU synchronization.