Design of a High-Power Resonant Converter for DC Wind Turbines

Dincan, Catalin Gabriel; Kjær, P.C.; Chen, Yu-Hsing; Sarra-Macia, Eduard; Munk‐Nielsen, Stig; Bak, Claus Leth; Vaisambhayana, Sriram

doi:10.1109/tpel.2018.2876320

Cited by 20 publications

(18 citation statements)

References 32 publications

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“…It is enough to recall here that the duty cycle is fixed to 50%, and one event is defined as a whole time interval in which the IGBT T 1 is pulsed or not, lasting half of the switching period [10]. e state variables are meaningful of the tank current and resonant capacitor voltage at the beginning of one event, while the rectified output current is averaged over one event.…”

Section: Linearized Model and Closed-loop Control Of Series Resonant mentioning

confidence: 99%

“…With the series resonant converter, the DC turbine converter can take advantages of high efficiency, highvoltage transformation ratio, and galvanic fault isolation for different ratings of turbine generator [6][7][8][9]. A series resonant converter SRC# with the resonant tank on the secondary side and governed by the phase shift and a frequency-depended power flow control technique is here considered [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Harmonic Susceptibility Study of DC Collection Network Based on Frequency Scan and Discrete Time-Domain Modelling Approach

Imbaquingo

Sarrá

Isernia

et al. 2018

Journal of Electrical and Computer Engineering

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The equivalent model of offshore DC power collection network for the harmonic susceptibility study is proposed based on the discrete time-domain modelling technique and frequency scan approach in the frequency domain. The proposed methodology for modelling a power converter and a DC collection system in the frequency domain can satisfy harmonic studies of any configuration of wind farm network and thereby find suitable design of power components and array network. The methodology is intended to allow studies on any configuration of the wind power collection, regardless of choice of converter topology, array cable configuration, and control design. To facilitate harmonic susceptibility study, modelling DC collection network includes creating the harmonic model of the DC turbine converter and modelling the array network. The current harmonics within the DC collection network are obtained in the frequency domain to identify the resonance frequency of the array network and potential voltage amplification issues, where the harmonic model of the turbine converter is verified by the comparison of the converter switching model in the PLECS™ circuit simulation tool and laboratory test bench, and show a good agreement.

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Section: Linearized Model and Closed-loop Control Of Series Resonant mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Harmonic Susceptibility Study of DC Collection Network Based on Frequency Scan and Discrete Time-Domain Modelling Approach

Imbaquingo

Sarrá

Isernia

et al. 2018

Journal of Electrical and Computer Engineering

Self Cite

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“…The grid connection of renewable energy and Flexible AC Transmission Systems (FACTS) is growing steadily thanks to increasingly competitive costs [1]- [5]. The cost reduction is a result of a number of factors, which often create challenges with regard to the electronic converter control design and stability analysis, such as a reduction in component size [6]- [9], the use of high-power converters to benefit from economies of scale [10], [11], or the use of new topologies [12]- [14]. For this reason, a reliable tool which makes it possible to readily analyze the system stability is of the utmost importance.…”

Section: Introductionmentioning

confidence: 99%

Control Design and Stability Analysis of Power Converters: The Discrete Generalized Bode Criterion

et al. 2021

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For the controller design and stability analysis of power electronic converters, the Bode stability criterion and its subsequent revisions are the most practical tools. However, even though the control of the power converter is usually implemented in a microprocessor, none of these methods is infallible when applied to a discrete system. This paper therefore proposes a new stability criterion, named the Discrete Generalized Bode Criterion (DGBC). This method is based on the Nyquist criterion but developed from the open-loop Bode diagram, evaluated also at 0 Hz and at the Nyquist frequency. The proposed criterion combines the advantages of the Nyquist and Bode criteria, since it is always applicable and provides an interesting and useful tool for the controller design process. The method is applied to design an active damping control of an inverter with LCL filter, showing how the proposed criterion accurately predicts stability, in contrast to the existing Bode criteria. The theoretical analysis is validated through experimental results performed with a three-phase inverter and an LCL filter. INDEX TERMS Active damping control, control design, frequency domain analysis, LC-filtered voltage source inverter (VSI), stability criteria.

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“…The medium frequency transformer (MFT) is one of the key components in the isolated dc-dc converters [1][2][3][4] related to: smart grids [5], photovoltaic power plants [6], wind power plants [7], and electric vehicle charging [8,9]. The three-phase topology is considered for high power applications where the high power density and high efficiency are required.…”

Section: Introductionmentioning

confidence: 99%

Effective Permeability of Multi Air Gap Ferrite Core 3-Phase Medium Frequency Transformer in Isolated DC-DC Converters

et al. 2020

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The magnetizing inductance of the medium frequency transformer (MFT) impacts the performance of the isolated dc-dc power converters. The ferrite material is considered for high power transformers but it requires an assembly of type “I” cores resulting in a multi air gap structure of the magnetic core. The authors claim that the multiple air gaps are randomly distributed and that the average air gap length is unpredictable at the industrial design stage. As a consequence, the required effective magnetic permeability and the magnetizing inductance are difficult to achieve within reasonable error margins. This article presents the measurements of the equivalent B(H) and the equivalent magnetic permeability of two three-phase MFT prototypes. The measured equivalent B(H) is used in an FEM simulation and compared against a no load test of a 100 kW isolated dc-dc converter showing a good fit within a 10% error. Further analysis leads to the demonstration that the equivalent magnetic permeability and the average air gap length are nonlinear functions of the number of air gaps. The proposed exponential scaling function enables rapid estimation of the magnetizing inductance based on the ferrite material datasheet only.

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Design of a High-Power Resonant Converter for DC Wind Turbines

Cited by 20 publications

References 32 publications

Harmonic Susceptibility Study of DC Collection Network Based on Frequency Scan and Discrete Time-Domain Modelling Approach

Harmonic Susceptibility Study of DC Collection Network Based on Frequency Scan and Discrete Time-Domain Modelling Approach

Control Design and Stability Analysis of Power Converters: The Discrete Generalized Bode Criterion

Effective Permeability of Multi Air Gap Ferrite Core 3-Phase Medium Frequency Transformer in Isolated DC-DC Converters

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