Operation of a phase locked loop system under distorted utility conditions

Kaura, V.; Blasko, V.

doi:10.1109/apec.1996.500517

Cited by 573 publications

(278 citation statements)

References 4 publications

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“…However, the measured signals can be contaminated with harmonics, voltage unbalances, and frequency variations [40]; also, the used sensors can introduce second order harmonics due to accuracy errors.…”

Section: Synchronization Algorithmmentioning

confidence: 99%

Control and synchronization algorithms for a grid-connected photovoltaic system under harmonic distortions, frequency variations and unbalances

et al. 2015

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a b s t r a c tIn this paper, an implementation of the control and the synchronization algorithms for a Voltage Source Inverter used as the power conditioner for Photovoltaic renewable energy in a grid-connected structure is carried out. Its main purpose is to show, in a simple manner, the design and combined operation of the control and synchronization algorithms for attaining the proper behaviour of the Grid Inverter when the 3-phase utility grid is disturbed by voltage unbalances, frequency variations and harmonic distortions, according to power quality standards.In order to obtain a high efficiency of the system during perturbations, a Proportional Resonant controller with a Harmonic Compensator structure is designed for the control algorithm, whereas a Dual Second Order Generalized Integrator Frequency-Locked Loop (DSOGI-FLL) is used as the synchronization algorithm.In order to validate both the control and the synchronization algorithms, some simulations using MATLAB/SIMULINK from The MathWorks, Inc. are shown firstly, and secondly, some real-time digital simulations are carried out.

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Section: Synchronization Algorithmmentioning

confidence: 99%

Control and synchronization algorithms for a grid-connected photovoltaic system under harmonic distortions, frequency variations and unbalances

et al. 2015

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“…2 is Eq. (2) shows that the high-frequency term damps out as V and φ approach their targeted values of V i and φ i . Thus, the structure of Fig.…”

Section: Introductionmentioning

confidence: 95%

“…The widely employed structure is the threephase PLL which operates based on the concept of dq-frame signals [1][2][3][4]. For a balanced harmonic-free input, this PLL estimates the input phase-angle without any double-frequency ripple in the loop.…”

Section: Introductionmentioning

confidence: 99%

A distortion-free phase-locked loop system for FACTS and power electronic controllers

Karimi-Ghartemani

2007

Electric Power Systems Research

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“…In this scenario, continuous, accurate and dynamic synchronization of the power electronic controllers with the complex network is of utmost importance for the smooth and stable operation of the overall system. The synchronous reference frame (SRF) PLL (Kaura and Blasko 1997;Chung 2000) was one of the important milestones in phase tracking for grid synchronization, which stimulated further developments in this field.…”

Section: Introductionmentioning

confidence: 99%

A Novel Self-Consistent Model Based Optimal Filter Design for the Improved Dynamic Performance of 3-phase PLLs for Phase Tracking Under Grid Imperfections

Jain

Ravikirthi

Nagamani

2014

J Control Autom Electr Syst

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In the context of recent advancements in 3-phase phase-locked loop (PLL) structures to tackle grid imperfections, this paper attempts to shift focus towards dynamic response optimization for fast tracking of disturbed grids, as opposed to Wiener optimization, a trade-off between filtering characteristic and dynamic response. In this respect, an ingenious self-consistent model (SCM)-based approach is proposed which explores filter design in the presence of frequency shifts and phase jumps, and facilitates the analytical computation of unique loop filter parameters. Trial and error in filter parameter selection is inconvenient, but more importantly, even rigorous trials would be insufficient in qualifying the non-existence of a better design. Having eliminated trial and error, this novel technique limits transients to user specifications while fixing on an optimum damping ratio, to yield the best fit. The design methodology is applied to three existing 3-phase PLL structures modelled in MATLAB/Simulink, and the proposed method is further evaluated through extensive simulations and performance comparisons with the traditional Wiener approach. To enhance the understanding of model behaviour and the feasibility of practical implementation, comprehensive three-dimensional (3-D) lookup tables are presented. They enable the study of optimized filter parameter variations for a range of grid disturbances, and broaden the application to filter optimization in real-time. In the interest of the reader, this paper is structurally split into two parts. Part 1 covers the premise and theory that explicates the proposed SCM methodology. The detailed analysis and verification of the SCM are covered in Part 2.

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Operation of a phase locked loop system under distorted utility conditions

Cited by 573 publications

References 4 publications

Control and synchronization algorithms for a grid-connected photovoltaic system under harmonic distortions, frequency variations and unbalances

Control and synchronization algorithms for a grid-connected photovoltaic system under harmonic distortions, frequency variations and unbalances

A distortion-free phase-locked loop system for FACTS and power electronic controllers

A Novel Self-Consistent Model Based Optimal Filter Design for the Improved Dynamic Performance of 3-phase PLLs for Phase Tracking Under Grid Imperfections

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