Analysis and Test of Diode Rectifier Solutions in Grid-Connected Wind Energy Conversion Systems Employing Modular Permanent-Magnet Synchronous Generators

Gerlando, A. Di; Foglia, G.; Iacchetti, Matteo F.; Perini, R.

doi:10.1109/tie.2011.2157295

Cited by 66 publications

(33 citation statements)

References 26 publications

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“…When the parameter f is represented with duty ratio d, the average model is given by Figure 15c (2) and (3), they can be rewritten by Laplace transformation and be expressed by: (4) where:…”

Section: Control Of the Proposed Pv Power Systemmentioning

confidence: 99%

“…Therefore, a dc/dc converter with voltage regulation is used to connect with PV power systems in parallel to keep the output voltage in the desired constant dc voltage range, as shown in Figure 1. In Figure 1, the dc bus voltage can supply a dc/ac inverter for a grid-connected power system [1][2][3][4][5], a dc/dc converter for dc load [6][7][8][9][10], and so on. The dc/ac inverter and dc/dc converter are regarded as dc loads.…”

Section: Introductionmentioning

confidence: 99%

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A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

Tseng

Wang

2013

Energies

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This paper presents a power system using a high step-up converter for dc load applications. The high step-up converter adopts a boost converter with interleaved mode and a coupled inductor to raise its powering ability and increase its step-up voltage ratio, respectively. In order to increase conversion efficiency, an active clamp circuit is introduced into the proposed one to provide soft-switching features to reduce switching losses. Moreover, switches in the converter and active clamp circuit are integrated with a synchronous switching technique to reduce circuit complexity and component counts, resulting in a lower cost and smaller volume. A perturb and observe method is adopted to extract the maximum power from photovoltaic (PV) arrays. Furthermore, a microchip associated with PWM IC is used to implement maximum power point tracking operation, voltage regulation and power management. Finally, a prototype PV power system with 400 V/6 A has been implemented for verifying the feasibility of the proposed PV power system. It is shown to be suitable for PV energy conversion applications when the duty ratios of switches in the dc/dc converter are less than 0.5.

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Section: Control Of the Proposed Pv Power Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

Tseng

Wang

2013

Energies

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“…By designing the boost converter on the dc-link as a current source, the ripple is decreased according to [3]. Other solutions involve multiphase machines, such as five phases [4], six phases [5] or dual three phase windings, one Y-connected and one ∆-connected [6]. More examples of different passive and active rectifiers are given in [7].…”

Section: Introductionmentioning

confidence: 99%

“…Surprisingly few articles measure the actual mechanical torque ripple from synchronous machines [8]. In [5] the mechanical torque is measured, but with too low sample rate for any ripple analysis to be possible.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Torque Ripple From a Passive Diode Rectifier in a 12 kW Vertical Axis Wind Turbine

Rossander

Goude

Eriksson

2017

IEEE Trans. Energy Convers.

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PostprintThis is the accepted version of a paper published in IEEE transactions on energy conversion. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Rossander, M., Goude, A., Eriksson, S. (2017) Mechanical torque ripple from a passive diode rectifier in a 12 kW vertical axis wind turbine. Abstract-The influence of passive rectification on the mechanical torque of a permanent magnet generator for a directly driven vertical axis wind turbine has been studied. Passive diode rectification introduce electromagnetic torque ripple from the generator. The conversion of electromagnetic torque ripple into mechanical torque ripple and rotational speed ripple has been modelled, analytically evaluated and simulated. The simulations have been compared to measurements on an open site 12 kW prototype. A parameter study with the model illustrates the impact of shaft torsional spring constant, generator rotor inertia, generator inductance and dc-link capacitance. The results show that the shaft and generator rotor can be an effective filter of electromagnetic torque ripple from diode rectification. The measured mechanical torque ripple amplitude on the prototype is less than ±0.9% of nominal turbine torque. The measurements compare well with the simulations.

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“…The majority of the literature deals with multiphase motor drives. However, studies of multiphase generators including five-phase [4], six-phase [5][6][7][8][9][10], ninephase [11], twelve-phase [12][13][14] and eighteen-phase [15] systems have also been reported. Most of these works have been related to wind energy systems, because the increasing ____________________ power rating (currently up to 10 MW) and reliability requirements (especially in offshore farms) match the advantageous features of multiphase machinery.…”

Section: Introductionmentioning

confidence: 99%

Operation of a Six-Phase Induction Machine Using Series-Connected Machine-Side Converters

Seng

Levi

Jones

et al. 2014

IEEE Trans. Ind. Electron.

146

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Abstract This paper discusses the operation of a multiphase system, aimed at both variable-speed drive and generating (e.g. wind energy) applications, using back-to-back converter structure with dual three-phase machine-side converters. In the studied topology, an asymmetrical six-phase induction machine is controlled using two three-phase two-level voltage source converters (VSCs) connected in series to form a cascaded dclink. The suggested configuration is analysed and a method for dc-link midpoint voltage balancing is developed. Voltage balancing is based on the use of additional degrees of freedom that exist in multiphase machines and represents an entirely new utilisation of these degrees. Validity of the topology and its control is verified by simulation and experimental results on a laboratory-scale prototype, thus proving that it is possible to achieve satisfactory dc-link voltage control under various operating scenarios.

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Analysis and Test of Diode Rectifier Solutions in Grid-Connected Wind Energy Conversion Systems Employing Modular Permanent-Magnet Synchronous Generators

Cited by 66 publications

References 26 publications

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

A Photovoltaic Power System Using a High Step-up Converter for DC Load Applications

Mechanical Torque Ripple From a Passive Diode Rectifier in a 12 kW Vertical Axis Wind Turbine

Operation of a Six-Phase Induction Machine Using Series-Connected Machine-Side Converters

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