EPE Association: WECS 2010 - 03b - Dialogue Session: Small Turbine Session

WECS 2010 - 03b - Dialogue Session: Small Turbine Session
You are here: EPE Documents > 03 - EPE Seminar Papers > 004 - EPE Wind Energy Chapter Seminar (2010) > WECS 2010 - 03b - Dialogue Session: Small Turbine Session

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   Presentation of the latest wind turbine design (KM1) utilising jet engine technology (Paper)
By Kevin Frew [View]
[Download]

Abstract: This paper presents a new design of wind turbine capable of operating a load factor that is significantly greater than conventional wind turbine designs. This is achieved by the large operational window unique to this machine, further consummated through several key elements in both mechanical and electrical design. Machine structure and principles accompanied by the advantages of the design are explored in the first section, wherein a comparison will be drawn against the conventional operating design. The main design area targeted is the turbine itself providing the drive and torque for the generator rotor. Another critical design investigated is the generator itself. The second section analyses the correlation between the KM1 turbine and the basis for the research, which is jet engine technology. Lastly the third section will discuss the transmission network KM1 project will be operating within.

   Identification of Control Signals for Optimal Control of Small-Scale Wind Turbines (Paper)
By Mahinsasa Narayana; Ghanim Putrus; Steve McDonald [View]
[Download]

Abstract: Perturbation & observation hill-climbing searching method is used for wind speed sensor-less optimal controlling of wind turbines. Aerodynamic power and system losses are required to identify the reference control signal. Wind turbine output power is interlaced with the rate of change of mechanically stored energy due to momentum of inertia of rotating parts. Therefore, reference control point is difficult to accurately evaluate from the electrical power output. Generally, in small scale wind turbines, only DC voltage and current are the accessible signals for optimal controlling. In this paper, adaptive digital filters are introduced to identify possible control signals from generator outputs time series data by eradicating the variation of mechanically stored energy and power losses in the system.

   Control Strategies for Efficiency Optimization of Small Direct Drive Wind Power Systems (Paper)
By M. Cacciato; A. Consoli; G. Scarcella; G. Scelba; R. Attanasio; T. BertÃ©nyi [View]
[Download]

Abstract: This paper compares a Direct Torque Control (DTC) and a sensorless Field Oriented Control (FOC) algorithm implemented on a back-to-back power electronic converter designed to achieve gusttracking capability for small Vertical Axis Wind Turbines (VAWTs). The two control techniques are optimized to provide optimal dynamic performances and they are compared taking into account operation during gusty wind conditions, typical of urban environments. In addition, considering the typical operating profile of VAWTs, the performance of permanent magnet synchronous generators are evaluated during gust tracking. Results from simulations highlight the suitability of the two control techniques to gust-tracking methods, with particular focus on energy harvesting and harmonic content mitigation.

WECS 2010 - 03b - Dialogue Session: Small Turbine Session
You are here: EPE Documents > 03 - EPE Seminar Papers > 004 - EPE Wind Energy Chapter Seminar (2010) > WECS 2010 - 03b - Dialogue Session: Small Turbine Session
	[return to parent folder]

	Presentation of the latest wind turbine design (KM1) utilising jet engine technology (Paper) By Kevin Frew	[View] [Download]
Abstract: This paper presents a new design of wind turbine capable of operating a load factor that is significantly greater than conventional wind turbine designs. This is achieved by the large operational window unique to this machine, further consummated through several key elements in both mechanical and electrical design. Machine structure and principles accompanied by the advantages of the design are explored in the first section, wherein a comparison will be drawn against the conventional operating design. The main design area targeted is the turbine itself providing the drive and torque for the generator rotor. Another critical design investigated is the generator itself. The second section analyses the correlation between the KM1 turbine and the basis for the research, which is jet engine technology. Lastly the third section will discuss the transmission network KM1 project will be operating within.

	Identification of Control Signals for Optimal Control of Small-Scale Wind Turbines (Paper) By Mahinsasa Narayana; Ghanim Putrus; Steve McDonald	[View] [Download]
Abstract: Perturbation & observation hill-climbing searching method is used for wind speed sensor-less optimal controlling of wind turbines. Aerodynamic power and system losses are required to identify the reference control signal. Wind turbine output power is interlaced with the rate of change of mechanically stored energy due to momentum of inertia of rotating parts. Therefore, reference control point is difficult to accurately evaluate from the electrical power output. Generally, in small scale wind turbines, only DC voltage and current are the accessible signals for optimal controlling. In this paper, adaptive digital filters are introduced to identify possible control signals from generator outputs time series data by eradicating the variation of mechanically stored energy and power losses in the system.

	Control Strategies for Efficiency Optimization of Small Direct Drive Wind Power Systems (Paper) By M. Cacciato; A. Consoli; G. Scarcella; G. Scelba; R. Attanasio; T. BertÃ©nyi	[View] [Download]
Abstract: This paper compares a Direct Torque Control (DTC) and a sensorless Field Oriented Control (FOC) algorithm implemented on a back-to-back power electronic converter designed to achieve gusttracking capability for small Vertical Axis Wind Turbines (VAWTs). The two control techniques are optimized to provide optimal dynamic performances and they are compared taking into account operation during gusty wind conditions, typical of urban environments. In addition, considering the typical operating profile of VAWTs, the performance of permanent magnet synchronous generators are evaluated during gust tracking. Results from simulations highlight the suitability of the two control techniques to gust-tracking methods, with particular focus on energy harvesting and harmonic content mitigation.