Front-end converter choice considerations for PMSG-based micro-wind turbines

Sokolovs, Alvis; Grigāns, Linards

doi:10.1109/rtucon.2015.7343123

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…Similarly, voltage vectors in the 'abc' frame can also be directly transformed into the 'dq0' frame, according to the multiplication of the matric, as given by Equation (12).…”

Section: Npc Converter Controlmentioning

confidence: 99%

“…Among power electronics converters, there are various sorts of rectifiers that have used for generator side energy conversion, such as, passive, active, and hybrid rectifier, as reviewed in [12,13]. Among the family of passive rectifiers, diode full-bridge rectifier remained more common in the past as a front end rectifier with harmonics and power factor problems, but these issues lower the efficiency of the whole system.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Hybrid Converter Proposed for Multi-MW Wind Generator for Offshore Applications

et al. 2019

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Modern multi-MW wind generators have used multi-level converter structures as well as parallel configuration of a back to back three-level neutral point clamped (3L-NPC) converters to reduce the voltage and current stress on the semiconductor devices. These configurations of converters for offshore wind energy conversion applications results in high cost, low power density, and complex control circuitry. Moreover, a large number of power devices being used by former topologies results in an expensive and inefficient system. In this paper, a novel bi-directional three-phase hybrid converter that is based on a parallel combination of 3L-NPC and ‘n’ number of Vienna rectifiers have been proposed for multi-MW offshore wind generator applications. In this novel configuration, total power equally distributes by sharing of total reference current in each parallel-connected generator side power converter, which ensures the lower current stress on the semiconductor devices. Newly proposed topology has less number of power devices compared to the conventional configuration of parallel 3L-NPC converters, which results in cost-effective, compact in size, simple control circuitry, and good performance of the system. Three-phase electric grid is considered as a generator source for implementation of a proposed converter. The control scheme for a directly connected three-phase source with a novel configuration of a hybrid converter has been applied to ratify the equal power distribution in each parallel-connected module with good power factor and low current distortion. A parallel combination of a 3L-NPC and 3L-Vienna rectifier with a three-phase electric grid source has been simulated while using MATLAB and then implemented it on hardware. The simulation and experimental results ratify the performance and effectiveness of the proposed system.

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“…Similarly, voltage vectors in the 'abc' frame can also be directly transformed into the 'dq0' frame, according to the multiplication of the matric, as given by Equation (12).…”

Section: Npc Converter Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Hybrid Converter Proposed for Multi-MW Wind Generator for Offshore Applications

et al. 2019

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“…Diverse electrical machine types and power converter topologies can be used in these applications. In the low power segment (< 5 kW), permanent magnet generators are preferred due to their efficiency and system simplicity [2], [3]. Several power converter topologies have been proposed for the wind generator side, including passive rectifier without or with DC converter (buck, boost, SEPIC, ...), half of full controlled rectifiers, etc.…”

Section: Introductionmentioning

confidence: 99%

Accurate Rotor Speed Estimation for Low-Power Wind Turbines

Guerrero

Lumbreras

Reigosa

et al. 2020

IEEE Trans. Power Electron.

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Small grid-tied wind turbines based on permanent magnet generators often use a cost-effective power converter topology consisting of a passive rectifier, a boost converter, and an H-bridge inverter. Speed or position sensors are rarely used due to cost issues. Model-based estimators relying on electrical magnitudes are used instead. However, such estimators are parameter sensitive, which limit their accuracy. Further concerns arise if these parameters change with the operating condition of the machine, mainly due to temperature. Speed sensorless control using the rectifier voltage ripple is analyzed in this paper. This technique provides good dynamic response and does not depend on machine parameters. Simulations are provided for speed and power tracking comparison with an accurate modelbased speed estimation method operating at non-rated parameters. They show the speed accuracy and power tracking capability of the proposed method are similar to that provided by a speed sensor. This is translated into a 0.9% power increase when the model-based speed estimator shows 9 % of error. Experimental results are carried out to test the effect of current and temperature in the estimation, showing temperature insensitivity and some distortion due to fast current transients. A speed estimation accuracy of zero mean error and 1.7% standard error is experimentally obtained in the regular operation of the wind turbine.

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“…Nowadays, PMSG are becoming more popular due to their reliability, gear-less configuration and light weight [19,20]. Indeed, for small wind energy applications, PMSG are becoming an attractive option for distributed generation due to their efficiency and system simplicity [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

A Controller for Optimum Electrical Power Extraction from a Small Grid-Interconnected Wind Turbine

et al. 2020

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Currently, wind power is the fastest-growing means of electricity generation in the world. To obtain the maximum efficiency from the wind energy conversion system, it is important that the control strategy design is carried out in the best possible way. In fact, besides regulating the frequency and output voltage of the electrical signal, these strategies should also extract energy from wind power at the maximum level of efficiency. With advances in micro-controllers and electronic components, the design and implementation of efficient controllers are steadily improving. This paper presents a maximum power point tracking controller scheme for a small wind energy conversion system with a variable speed permanent magnet synchronous generator. With the controller, the system extracts optimum possible power from the wind speed reaching the wind turbine and feeds it to the grid at constant voltage and frequency based on the AC–DC–AC conversion system. A MATLAB/SimPowerSystems environment was used to carry out the simulations of the system. Simulation results were analyzed under variable wind speed and load conditions, exhibiting the performance of the proposed controller. It was observed that the controllers can extract maximum power and regulate the voltage and frequency under such variable conditions. Extensive results are included in the paper.

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Front-end converter choice considerations for PMSG-based micro-wind turbines

Cited by 10 publications

References 15 publications

A Novel Hybrid Converter Proposed for Multi-MW Wind Generator for Offshore Applications

A Novel Hybrid Converter Proposed for Multi-MW Wind Generator for Offshore Applications

Accurate Rotor Speed Estimation for Low-Power Wind Turbines

A Controller for Optimum Electrical Power Extraction from a Small Grid-Interconnected Wind Turbine

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