Uniform Voltage Distribution Control for Paralleled-Input, Series-Output Connected Converters

Siri, K.; Conner, K.A.; Truong, Chanh-Tin

doi:10.1109/aero.2005.1559580

Cited by 40 publications

(3 citation statements)

References 17 publications

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“…The configuration tested through simulation and experiments has been found to be robust, stable and reliable [5]. A digital control algorithm for a power factor correction has been designed for a fly back ac-dc converter [6].…”

Section: Introductionmentioning

confidence: 99%

<title>Fuzzy based power factor improvement strategy for a multiple connected AC-DC converter fed drive</title>

Radhakrishnan

Ramaswamy

2012

SPIE Proceedings

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The main focus of this paper is to design a Fuzzy based control algorithm to realize an improvement in the input power factor of a multiple connected AC-DC converter fed drive system. It incorporates the role of fuzzy inference principles to generate appropriate PWM pulses for the power switches at the second stage of the power module. The philosophy is developed, with a view to reshape the input current phasor and enables it to align with the supply voltage wave in the perspective of improving the input power factor. The closed loop scheme evaluated using MATLAB based simulation exhibits an enhancement in supply power factor over a range of operating loads in addition to illustrating the speed regulating capability of the drive.

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Section: Introductionmentioning

confidence: 99%

<title>Fuzzy based power factor improvement strategy for a multiple connected AC-DC converter fed drive</title>

Radhakrishnan

Ramaswamy

2012

SPIE Proceedings

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“…For example, Mania and Kostakis [20] proposed a method in which each module shares an output voltage loop and has an independent current loop, where the output of the common output voltage loop is the given signal of each input current loop to ensure that the input current of each module is equal to achieve the output voltage sharing of each module. Siri et al [21] selected the modules' highest output voltage as the reference voltage and compared it with other modules' output voltage; then, the deviation signal is superimposed on the output voltage loop to adjust the output voltage of each module.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Control Strategy of a Combined Converter in a Photovoltaic DC Boost Collection System under Partial Shading Conditions

Guo

Liu

et al. 2020

Energies

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Series–parallel module technology can meet a DC converter’s requirements of high-power, large-capacity, and high step-up ratio in photovoltaic a DC boost collection system. However, the cascaded structure has the problem of voltage and current sharing between modules, and due to the duty cycle limitation of converters, the combined converters in the PV-converter unit have an unbalanced voltage, which may also exceed the voltage range under partial shading conditions (PSCs). First, aiming at the problems of voltage sharing, current sharing, and low modularity in the combined converter, this paper proposes a distributed control strategy. Then, by adopting a coordinated control strategy based on the sub-module cutting in and out, the problem that the combined converter cannot normally boost under PSCs was solved. The paper not only takes the advantages of the cascade structure of the combined converter to increase the power and voltage, but also improves its modularity to solve the problem of abnormal operation under uneven irradiation. This dramatically improves the adaptability of combined converters in a photovoltaic DC collection system. Finally, a small power experiment was carried out, where the experimental results verified the effectiveness of the control strategy.

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“…Issues related to fault‐tolerance control are not addressed. Uniform output voltage distribution across several modules has been realised using an output voltage distributed control scheme [18], but additional circuitry is required to provide fault‐tolerant performance. In this paper, the overall output voltage controller builds on the Lyapunov stability law to make the system asymptotically stable.…”

Section: Introductionmentioning

confidence: 99%

Modular input‐parallel output‐series DC/DC converter control with fault detection and redundancy

Lian

Adam

Holliday

et al. 2016

IET Generation, Transmission & Distribution

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This version is available at https://strathprints.strath.ac.uk/54599/ 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 AbstractLarge offshore wind farms will require an extensive sub-sea power network to provide internal interconnection. Present solutions are based around conventional medium-voltage AC architectures. This paper proposes an alternative DC collection network based around modular DC/DC converters with input-parallel-output-series (IPOS) connection. Smallsignal analysis of the converter is presented, to assist in control scheme development for the converter input and output stages. A Lyapunov controller is embedded within the conventional output voltage sharing control loop. A masterslave control scheme is proposed to ensure power sharing under a range of operating conditions, and provides faulttolerant operation since the status of 'master' can be reallocated in the event that the present 'master' module fails.

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Uniform Voltage Distribution Control for Paralleled-Input, Series-Output Connected Converters

Cited by 40 publications

References 17 publications

<title>Fuzzy based power factor improvement strategy for a multiple connected AC-DC converter fed drive</title>

<title>Fuzzy based power factor improvement strategy for a multiple connected AC-DC converter fed drive</title>

Coordinated Control Strategy of a Combined Converter in a Photovoltaic DC Boost Collection System under Partial Shading Conditions

Modular input‐parallel output‐series DC/DC converter control with fault detection and redundancy

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