scholarly journals Development and Performance Investigation of a Unique Dual-rotor Savonius-type Counter-rotating Wind Turbine

2021 ◽  
Vol 13 (6) ◽  
Author(s):  
Djamal Hissein Didane ◽  
◽  
Do’arsherah Kudam ◽  
Mohd Fadhli Zulkafli ◽  
Sofian Mohd ◽  
...  
Keyword(s):  
Wind Energy ◽  
Energy Conversion ◽  
Wind Turbine ◽  
Conversion Efficiency ◽  
Average Power ◽  
Aerodynamic Characteristics ◽  
Rotor System ◽  
Power Coefficient ◽  
Wind Energy Conversion ◽  
Energy Conversion Systems

Wind power is sustainable and prevalent virtually all over the globe. However, the conversion efficiency of the conventional single-rotor wind turbine (SRWT) is still far from satisfactory. The dual-rotor counter-rotating concept is among the reliable techniques used to enhance the efficiency of a wind energy conversion device for its renowned effectiveness. This study aims to investigate the performance of a Savonius dual/twin-rotor system, particularly in low-speed wind conditions while employing the counter-rotating technique. The evaluation of this technique is presented in terms of aerodynamic characteristics, including the power and torque coefficients. The results have shown that the new concept was able to improve the performance of the system extensively and was capable of operating in a lower wind speed condition. Compared to a single-rotor system, an additional 42% more torque was possible owing to the existence of a second rotor in the new system. The results have also revealed that the conversion efficiency of the system has been enhanced substantially. A corresponding average power coefficient of up to 28% was achieved. The present technique is thought to be promising for wind energy conversion systems, including sites with poor wind conditions.

scholarly journals Some Issues Related to Power Generation Using Wind Energy Conversion Systems: An Overview

2005 ◽  
Vol 3 (2) ◽  
Author(s):  
Dr. R. C. Bansal ◽  
Dr. Ahmed F Zobaa ◽  
Dr. R. K. Saket
Keyword(s):  
Power Generation ◽  
Wind Energy ◽  
Energy Conversion ◽  
Wind Turbine ◽  
Wind Power ◽  
Reactive Power ◽  
Wind Power Generation ◽  
Wind Energy Conversion ◽  
Wind Energy Conversion Systems ◽  
Energy Conversion Systems

Design and successful operation of wind energy conversion systems (WECs) is a very complex task and requires the skills of many interdisciplinary skills, e.g., civil, mechanical, electrical and electronics, geography, aerospace, environmental etc. Performance of WECs depends upon subsystems like wind turbine (aerodynamic), gears (mechanical), generator (electrical); whereas the availability of wind resources are governed by the climatic conditions of the region concerned for which wind survey is extremely important to exploit wind energy. This paper presents a number of issues related to the power generation from WECs e.g. factors affecting wind power, their classification, choice of generators, main design considerations in wind turbine design, problems related with grid connections, wind-diesel autonomous hybrid power systems, reactive power control of wind system, environmental aspects of power generation, economics of wind power generation, and latest trend of wind power generation from off shore sites.

Different Strategies for Controlling Output Power Smoothing of a PMSG-Based Wind Energy Conversion Systems

2012 ◽  
Vol 13 (4) ◽  
Author(s):  
Alok Pratap ◽  
Abdul Motin Howlader ◽  
Tomonobu Senjyu ◽  
Atsushi Yona ◽  
Naomitsu Urasaki ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Wind Energy ◽  
Energy Conversion ◽  
Wind Turbine ◽  
Output Power ◽  
Wind Energy Conversion ◽  
Wind Energy Conversion Systems ◽  
Power Smoothing ◽  
Energy Conversion Systems ◽  
Grid Side

Abstract This paper deals with controlling the output power smoothing of a wind energy conversion systems (WECS) by using permanent magnet synchronous generator (PMSG). It uses the inertia control of the wind turbine and DC-link voltage control. The PMSG is connected to the grid through a generator-side converter and a grid-side inverter based on AC-DC-AC methods. The generator-side converter is used to control the torque of the PMSG while the grid-side inverter is used to control DC-Link voltage and grid voltage. Fuzzy logic is implemented to determine the torque command by using inertia of wind turbine. The inputs of the fuzzy logic are given by the operating point of the rotational speed of the PMSG and the difference between the wind turbine torque and the generator torque. From the proposed method, the generator torque is smoothed and kinetic energy generated by the inertia of the wind turbine is used to smooth the power fluctuations of PMSG. Also, a stable operation of WECS is achieved during the system fault by using the chopper circuit in the DC-link circuit. The output power smoothing is achieved with stability and low cost. The effectiveness of the proposed method is verified by the numerical simulations.

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