Implementation of Control System for Hydrokinetic Energy Converter

Yuen, Katarina; Apelfröjd, Senad; Leijon, Mats

doi:10.1155/2013/342949

Cited by 4 publications

(3 citation statements)

References 9 publications

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“…Experimental results presented in [13] shows that the rotational speed can be set to operate with a variance of 4%. Further details of the control and measurement system can be found in [18].…”

Section: Electrical Layout and Control Systemmentioning

confidence: 99%

Validation of a Coupled Electrical and Hydrodynamic Simulation Model for a Vertical Axis Marine Current Energy Converter

2018

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This paper validates a simulation model that couples an electrical model in Simulink with a hydrodynamic vortex-model by comparing with experimental data. The simulated system is a vertical axis current turbine connected to a permanent magnet synchronous generator in a direct drive configuration. Experiments of load and no load operation were conducted to calibrate the losses of the turbine, generator and electrical system. The power capture curve of the turbine has been simulated as well as the behaviour of a step response for a change in tip speed ratio. The simulated results agree well with experimental data except at low rotational speed where the accuracy of the calibration of the drag losses is reduced.

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Section: Electrical Layout and Control Systemmentioning

confidence: 99%

Validation of a Coupled Electrical and Hydrodynamic Simulation Model for a Vertical Axis Marine Current Energy Converter

2018

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“…A more detailed description of the generator can be found in [13]. Further details of the control and measurement system can be found in [14].…”

Section: The Söderfors Experimental Stationmentioning

confidence: 99%

Experimental Results of a DC Bus Voltage Level Control for a Load-Controlled Marine Current Energy Converter

et al. 2015

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This paper investigates three load control methods for a marine current energy converter using a vertical axis current turbine (VACT) mounted on a permanent magnet synchronous generator (PMSG). The three cases are; a fixed AC load, a fixed pulse width modulated (PWM) DC load and DC bus voltage control of a DC load. Experimental results show that the DC bus voltage control reduces the variations of rotational speed by a factor of 3.5 at the cost of slightly increased losses in the generator and transmission lines. For all three cases, the tip speed ratio λ can be kept close to the expected λ opt . The power coefficient is estimated to be 0.36 at λ opt ; however, for all three cases, the average extracted power was about ∼ 19%. A maximum power point tracking (MPPT) system, with or without water velocity measurement, could increase the average extracted power.

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“…Numerous large marine turbine projects with output power above 0.5 MW are presented in [2][3][4], with several in the pre-commercial stage. Research focusing on converting the power in free flowing water using a vertical axis turbine with a directly driven permanent magnet generator is being conducted by a research group at Uppsala University [5][6][7][8][9][10]. The concept investigated at Uppsala University uses a cross flow, fixed pitch vertical axis turbine directly connected to a nonesalient permanent magnet generator.…”

Section: Introductionmentioning

confidence: 99%

A Back-to-Back 2L-3L Grid Integration of a Marine Current Energy Converter

et al. 2015

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The paper proposes a back-to-back 2L-3L grid connection topology for a marine current energy converter. A prototype marine current energy converter has been deployed by a research group at Uppsala University. The concept behind the prototype revolves around a fixed pitch vertical axis turbine directly connected to a permanent magnet synchronous generator (PMSG). The proposed grid connection system utilizes a well known and proven two level voltage source converter generator-side combined with a three-level cascaded H-bridge (CHB) multilevel converter grid-side. The multilevel converter brings benefits in terms of efficiency, power quality and DC-link utilization. The system is here presented for a single marine current energy converter but can easily be scaled up for clusters of marine current energy converters. Control schemes for both grid-side and generator-side voltage source converters are presented. The start-up, steady state and dynamic performance of the marine current energy converter are investigated and simulation results are presented in this paper.

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Implementation of Control System for Hydrokinetic Energy Converter

Cited by 4 publications

References 9 publications

Validation of a Coupled Electrical and Hydrodynamic Simulation Model for a Vertical Axis Marine Current Energy Converter

Validation of a Coupled Electrical and Hydrodynamic Simulation Model for a Vertical Axis Marine Current Energy Converter

Experimental Results of a DC Bus Voltage Level Control for a Load-Controlled Marine Current Energy Converter

A Back-to-Back 2L-3L Grid Integration of a Marine Current Energy Converter

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