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Abstract
A novel control strategy is proposed for the control of two fixed pitch tidal turbines subjected to discrete flow speeds whilst interconnected in an array. It is suggested that reliability will be increased by locating all power conversion and control equipment onshore, thereby reducing Operating Expenditure (OPEX) due to offshore equipment failure. An added benefit is utilisation of a single shared export cable for both turbines, thereby reducing Capital Expenditure (CAPEX). By lowering the cost of installing and maintaining an array it is anticipated that the commercial viability of the project will be enhanced. Speed regulation of Induction Generators (IG) is carried out through Field Oriented Control (FOC) with reference torque calculated by Optimal Torque Control (OTC). This provides Maximum Power Point Tracking (MPPT) whilst allowing individual generators to run at different speeds by varying the Tip Speed Ratio (TSR) of each turbine. Estimated current waveforms calculated via FOC are averaged between both turbines and fed to a Pulse Width Modulation (PWM) generator for comparison
against actual averaged currents from both generators. A shared Insulated Gate Bipolar Transistor (IGBT) rectifier is controlled by PWM pulses to maintain the currents of both generators in phase. A Simulink model was constructed to test this control strategy; the results generated demonstrate that two turbines can be operated in parallel, whilst still maintaining an acceptable level of efficiency.
against actual averaged currents from both generators. A shared Insulated Gate Bipolar Transistor (IGBT) rectifier is controlled by PWM pulses to maintain the currents of both generators in phase. A Simulink model was constructed to test this control strategy; the results generated demonstrate that two turbines can be operated in parallel, whilst still maintaining an acceptable level of efficiency.
Original language | English |
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Title of host publication | Proceedings of the 13th European Wave and Tidal Energy Conference (EWTEC 2019) |
Place of Publication | Napoli, Italy |
Publisher | EWTEC |
Publication status | Published - Sept 2019 |
Event | 13th European Wave and Tidal Energy Conference - Napoli, Italy Duration: 1 Sept 2019 → 6 Sept 2019 |
Conference
Conference | 13th European Wave and Tidal Energy Conference |
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Abbreviated title | 13th EWTEC |
Country/Territory | Italy |
City | Napoli |
Period | 1/09/19 → 6/09/19 |
Fingerprint
Dive into the research topics of 'Speed Control of Multiple Tidal Turbines Connected to a Shared Onshore Converter'. Together they form a unique fingerprint.Projects
- 1 Finished
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United Kingdom Centre for Marine Energy Research
Wallace, R. (Principal Investigator), Ingram, D. (Co-investigator), Jeffrey, H. (Co-investigator) & Kiprakis, A. (Co-investigator)
1/10/16 → 31/05/19
Project: Research
Research output
- 3 Conference contribution
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A Speed Control Strategy for Parallel Connected Tidal Turbines in an Array Using a Variable Ratio Drive
Reynolds, S., Kiprakis, A. & Abusara, M., Apr 2019, Proceedings of the 7th Oxford Tidal Energy Workshop. University of Oxford, p. 35-36 2 p.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Open AccessFile -
Reinforcement Learning Based Maximum Power Point Tracking Control of Tidal Turbines
Nambiar, A., Anderlini, E., Payne, G., Forehand, D., Kiprakis, A. & Wallace, A., 2017, Proceedings of the European Wave and Tidal Energy Conference 2017.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
File -
Assessment of an ADCP's capabilities in laboratory conditions
Harrold, M., Bromley, P., Broudic, M., Clelland, D., Kiprakis, A. & Abusara, M., 29 Apr 2015, 2015 IEEE/OES 11th Current, Waves and Turbulence Measurement, CWTM 2015. Institute of Electrical and Electronics Engineers, 7098099Research output: Chapter in Book/Report/Conference proceeding › Conference contribution