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   Articles with "locked loop" as a keyword



Improved sinusoid-locked loop equipped with a virtual stator impedance to estimate the grid voltage parameters

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recommendations! Published in 2019 at "Electric Power Systems Research"

DOI: 10.1016/j.epsr.2019.04.013

Abstract: Abstract Grid voltage parameters, including the amplitude, frequency and phase angle, are the essential information for the control and protection of power systems. The sinusoid-locked loop (SLL) is a novel approach to estimate the grid… read more here.

Keywords: grid voltage; sinusoid locked; locked loop; voltage ... See more keywords

Phase-locked loop with DC offset removal for single-phase grid-connected converters

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recommendations! Published in 2021 at "Electric Power Systems Research"

DOI: 10.1016/j.epsr.2020.106980

Abstract: Abstract DC-offset in the input of the phase-locked loop (PLL) is an emerging problem that causes oscillations in the estimated fundamental grid phase, frequency, and voltage amplitude. The DC-offset rejection in grid synchronization is a… read more here.

Keywords: locked loop; phase locked; loop offset; phase grid ... See more keywords

Relative stability analysis of optical injection phase-locked loop

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recommendations! Published in 2017 at "Optik"

DOI: 10.1016/j.ijleo.2017.04.077

Abstract: Abstract In this paper, we analyze the relative stability of optical injection phase-locked loop (OIPLL) in terms of the phase margin considering loop-delay into account. Phase margin of first- and second-order OIPLL are calculated as… read more here.

Keywords: phase; locked loop; phase locked; stability ... See more keywords

Study of multistage composite loop control based on optical phase-locked loop technology

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recommendations! Published in 2018 at "Optics Communications"

DOI: 10.1016/j.optcom.2018.04.032

Abstract: Abstract The Doppler shift of the satellite-to-satellite coherent communication system reaches gigahertz magnitude. Owing to the influence of the linewidth and phase noise of the tuned laser, the optical phase-locked loop (OPLL) system is required… read more here.

Keywords: phase; optical phase; system; locked loop ... See more keywords

Three-phase phase-locked loop synchronization algorithms for grid-connected renewable energy systems: A review

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recommendations! Published in 2018 at "Renewable and Sustainable Energy Reviews"

DOI: 10.1016/j.rser.2018.03.086

Abstract: Abstract The increasing penetration of distributed renewable energy sources (RES) requires appropriate control techniques in order to remain interconnected and contribute in a proper way to the overall grid stability, whenever disturbances occur. In addition,… read more here.

Keywords: phase; locked loop; renewable energy; phase locked ... See more keywords

Variable gradient-based phase locked loop for accurate frequency estimation of distorted grids

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recommendations! Published in 2025 at "Scientific Reports"

DOI: 10.1038/s41598-025-21621-2

Abstract: A variable gradient-based phase locked loop (VG-PLL) is developed for distorted grids. Firstly, the large-signal model of the synchronous reference frame phase locked loop (SRF-PLL) with harmonic disturbances is established, and the large-signal model shows… read more here.

Keywords: pll; phase locked; locked loop; variable gradient ... See more keywords

Design and Implementation of Digital Phase Locked Loop for Single-Phase Grid-Tied PV Inverters

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recommendations! Published in 2018 at "Electric Power Components and Systems"

DOI: 10.1080/15325008.2018.1511640

Abstract: Abstract In this article, a synchronous rotating-frame based phase-locked loop (PLL) for a single-phase PV inverter control system is presented. Detailed PLL mathematical model and the digital implementation for a single-phase PV inverter system are… read more here.

Keywords: phase; implementation; phase inverter; locked loop ... See more keywords

A monolithic K-band phase-locked loop for microwave radar application*

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recommendations! Published in 2017 at "Journal of Semiconductors"

DOI: 10.1088/1674-4926/38/2/025002

Abstract: A monolithic K-band phase-locked loop (PLL) for microwave radar application is proposed and implemented in this paper. By eliminating the tail transistor and using optimized high- Q LC -tank, the proposed voltage-controlled oscillator (VCO) achieves… read more here.

Keywords: monolithic band; phase; band phase; locked loop ... See more keywords
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Development of Frequency Fixed Sliding Discrete Fourier Transform Filter Based Single-Phase Phase-Locked Loop

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recommendations! Published in 2021 at "IEEE Access"

DOI: 10.1109/access.2021.3100111

Abstract: The single-phase phase-locked loop (PLL) is essential for the stable operation and control of single-phase grid-connected converters. However, in practical applications, the grid voltage is usually affected by harmonics and dc offset, which will cause… read more here.

Keywords: locked loop; phase phase; phase locked; sliding discrete ... See more keywords
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Frequency-Locked Loop Based on Active Noise Cancellation Syncretized Two First-Order Low Pass Filters

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recommendations! Published in 2022 at "IEEE Access"

DOI: 10.1109/access.2021.3140122

Abstract: To improve the performance of the frequency lock loop (FLL) under the conditions of a distorted power grid and unexpected noise, a new type of frequency locked loop (Al-FLL) is proposed, in which the AL-FLL… read more here.

Keywords: locked loop; order; fll; noise ... See more keywords

Design and Analysis of Enhanced Phase-Locked Loop: Methods of Lyapunov and Natural Gradient

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recommendations! Published in 2025 at "IEEE Access"

DOI: 10.1109/access.2024.3510614

Abstract: The phase-locked loop (PLL) plays a crucial role in modern power systems, primarily for estimating line voltage parameters and tracking variations needed to synchronize and control grid-connected power converters. The enhanced phase-locked loop (EPLL) builds… read more here.

Keywords: natural gradient; phase locked; phase; enhanced phase ... See more keywords