A Software-based Low-Jitter Servo Clock for Inexpensive Phasor Measurement Units
2018 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS)(2018)
摘要
This paper presents the design and the implementation of a servo-clock (SC) for low-cost Phasor Measurement Units (PMUs). The SC relies on a classic Proportional Integral (PI) controller, which has been properly tuned to minimize the synchronization error due to the local oscillator triggering the on-board timer. The SC has been implemented into a PMU prototype developed within the OpenPMU project using a BeagleBone Black (BBB) board. The distinctive feature of the proposed solution is its ability to track an input Pulse-Per-Second (PPS) reference with good long-term stability and with no need for specific on-board synchronization circuitry. Indeed, the SC implementation relies only on one co-processor for real-time application and requires just an input PPS signal that could be distributed from a single substation clock.
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关键词
Servo clock,time synchronization,syntonization,Phasor Measurement Units,smart grid
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