Proposals and Analysis of Space Vector-Based Phase-Locked-Loop Techniques for Synchrophasor, Frequency, and ROCOF Measurements



Ferrero, Roberto ORCID: 0000-0001-7820-9021, Pegoraro, Paolo Attilio and Toscani, Sergio
(2020) Proposals and Analysis of Space Vector-Based Phase-Locked-Loop Techniques for Synchrophasor, Frequency, and ROCOF Measurements. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 69 (5). pp. 2345-2354.

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Abstract

Space vector (SV)-based estimation algorithms represent attractive methods for synchronized phasor, frequency, and rate of change of frequency measurements in three-phase ac power systems. Recently, a phase-locked-loop (PLL) solution for improving the demodulation of the SV signal has been proposed. In this article, the potentialities of the SV-PLL approach are investigated in order to optimize accuracy and computational load. First, the impact of the PLL update rate on achieved performance is analyzed. Then, a novel two-step SV-PLL algorithm is presented so that the accuracy of a fast PLL execution frequency can be matched with a considerably lower computational cost. The behavior in the case of fast phase angle variations has been also significantly improved. The proposed synchrophasor estimation technique has been validated through simulations; exemplary dynamic performance suggests that it is particularly suitable for grid control applications. Experimental tests carried out on a real-time implementation confirm simulation results.

Item Type: Article
Uncontrolled Keywords: Phase locked loops, Frequency estimation, Phasor measurement units, Estimation, Power system dynamics, Phase measurement, Current measurement, frequency measurement, phase-locked loops (PLLs), phasor measurement units (PMUs), power distribution, power transmission, synchrophasor estimation, three-phase systems, voltage measurement
Depositing User: Symplectic Admin
Date Deposited: 02 Mar 2020 15:12
Last Modified: 15 Mar 2024 01:27
DOI: 10.1109/TIM.2020.2973873
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3076568