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.
A Software-based Low-Jitter Servo Clock for Inexpensive Phasor Measurement Units / Tosato, Pietro; Macii, David; Fontanelli, Daniele; Brunelli, Davide; Laverty, David. - In: IEEE INTERNATIONAL SYMPOSIUM ON PRECISION CLOCK SYNCHRONIZATION FOR MEASUREMENT, CONTROL, AND COMMUNICATION. - ISSN 1949-0305. - ELETTRONICO. - 2018-:(2018), pp. 1-6. (Intervento presentato al convegno ISPCS tenutosi a Geneva, Switzerland nel 30 Set. - 5 Ott. 2018) [10.1109/ISPCS.2018.8543082].
A Software-based Low-Jitter Servo Clock for Inexpensive Phasor Measurement Units
Tosato, Pietro;Macii, David;Fontanelli, Daniele;Brunelli, Davide;
2018-01-01
Abstract
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.File | Dimensione | Formato | |
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