Operation of a phase locked loop system under distorted utility conditions

Kaura, V.; Blasko, V.

doi:10.1109/28.567077

Cited by 933 publications

(153 citation statements)

References 2 publications

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“…The summed error between the references and sequence components of the currents of n inverter systems is minimized with (15) and (16). Minimizing the error is the same as the way of the current control working.…”

Section: Complex Optimization Problemmentioning

confidence: 99%

“…2. This control is generally performed in the synchronous rotating dq frame in which the d axis is aligned with the positive sequence components of the terminal voltage; this alignment -socalled synchronization -is achieved with a phase-locked loop (PLL) technique [7,15]. In the synchronized frame, the active and reactive powers to the grid can be regulated by d-and q-axis current control, respectively; thus, the DClink voltage is regulated by controlling the d-axis current [16].…”

Section: Operating Characteristicsmentioning

confidence: 99%

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Fault Analysis Method for Power Distribution Grid with PCS-based Distributed Energy Resources

Kim¹,

Cho²

2017

Journal of Electrical Engineering and Technology

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-In this study, we propose a fault analysis method for a power distribution grid with PCSbased DERs. We first explain the characteristics of a PCS-based DER. According to the characteristics, the DER is considered as a current-controlled voltage source, which produces varying voltages within a certain limit so that currents equal to given references flowing from the DER to the grid (currents controlled). So, we introduce the symmetrical equivalent models in the form of varying voltage source for fault analysis and then, construct a convex optimization problem to solve the fault problem associated with the equivalent models and grid conditions. Thus, the proposed method enables to perform a proper fault analysis considering the characteristics of the DER, which are currents controlled, voltage limited, and unity power factor achievement. To verify the validity of the proposed method, we perform computer simulations with the proposed method and with MATLAB Simulink, and the results are compared.

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Section: Complex Optimization Problemmentioning

confidence: 99%

Section: Operating Characteristicsmentioning

confidence: 99%

Fault Analysis Method for Power Distribution Grid with PCS-based Distributed Energy Resources

Kim¹,

Cho²

2017

Journal of Electrical Engineering and Technology

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“…A fixed frequency control suggested in [14] can maintain a stable offshore frequency and can be a potential solution for synchronization, but global positioning system (GPS) is required for each WT. In fact, for the converters used in the power system and industry, phase-locked loop (PLL) is a much simpler and more efficient tool for system synchronization [16], [17].Therefore, in this paper, a new distributed PLL-based frequency control is proposed for the operation of the WT converters connected with DR-HVDC system. Unlike in [8]-[11], communication is not required for the proposed distributed PLL-based frequency control.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Distributed PLL-Based Control of Offshore Wind Turbines Connected With Diode-Rectifier-Based HVDC Systems

2018

IEEE Trans. Power Delivery

102

135

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This version is available at https://strathprints.strath.ac.uk/62289/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.This paper is a post-print of a paper submitted to and accepted for publication in IEEE Transactions on Power Delivery and is subject to Institution of Electrical and Electronic Engineering Copyright. The copy of record is available at IEEE Xplore Digital Library.Abstract-A distributed PLL-based frequency control is proposed in this paper for offshore wind turbine converters connected with diode-rectifier based high-voltage-direct-current (HVDC) systems. The proposed control enables a large number of wind turbines to work autonomously to contribute to the offshore AC frequency and voltage regulation. The proposed control also provides automatic synchronization of the offline wind turbines to the offshore AC grid. Stability of the proposed frequency control is analyzed using root locus method. Moreover, an active dc voltage control of the onshore modular multilevel converter (MMC) is proposed to ride-through onshore AC fault, where the onshore MMC converter quickly increases the dc voltage by adding additional submodules in each phase, in order to rapidly reduce wind farm active power generation so as to achieve quick active power re-balance between the offshore and onshore sides. Thus the overvoltage of the submodule capacitor is alleviated during the onshore fault, reducing the possibility of system disconnection. Simulation results in PSCAD verify the proposed control strategy during start-up, synchronization and under onshore and offshore fault conditions. Index Terms-diode-rectifier based HVDC, distributed PLLbased frequency control, offshore wind power integration, onshore AC fault, synchronization of wind turbine converters I. INTRODUCTION N Europe, onshore wind farms have already been well developed, and more attention has been drawn to offshore sites. Many large offshore wind farms will be developed in the ...

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“…Os trabalhos de , (Milanes-Montero, et al, 2007), (Robles, et al, 2010) e (Freijedo, et al, 2009a) (Kaura, et al, 1997) e (Freijedo, et al, 2009b) tratam do ajuste do controlador do PLL.…”

Section: Montero Et Al 2007); Dual Second Order Generalized Integrunclassified

Implementação de controladores para conversores trifásicos, sem transformações de coordenadas: análise geométrica através de vetores espaciais.

Matakas¹

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Operation of a phase locked loop system under distorted utility conditions

Cited by 933 publications

References 2 publications

Fault Analysis Method for Power Distribution Grid with PCS-based Distributed Energy Resources

Fault Analysis Method for Power Distribution Grid with PCS-based Distributed Energy Resources

Distributed PLL-Based Control of Offshore Wind Turbines Connected With Diode-Rectifier-Based HVDC Systems

Implementação de controladores para conversores trifásicos, sem transformações de coordenadas: análise geométrica através de vetores espaciais.

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