How Wind Energy is converted to Electrical Energy Essay Example

Habash etal. (2011) in the Journal Performance of a contra rotating small wind energy converter gives a detailed explanation of how wind energy is converted to electrical energy. My research on ‘how wind energy is converted to Electrical energy’ is from this journal.

Habassh and Groza are senior lectures and Engineers at Otawa University in the department of Electrical engineering and computer science. Yang is a professor in the department of Mechanical Engineering in the same university while Guillemette is senior researcher with TRIAS innovations Group in Ottawa. These lectures and scientist have wide knowledge on production of electrical power by use of wind mills and therefore their sources are considered reliable for academic purposes. These four professionals have been involved with research and professional academic writing in areas of mechanical and electrical engineering and are therefore authority in this profession. This Journal gives the latest most effective system for wind power generation.

3) How rotor torque and power are maximized, 4) A discussion on various tests and experiments made to date to maximize power produced. The journal is part of research that aimed to produce a wind mill with high efficiency. I will use the first section on introduction to working principles of wind systems to explain how wind energy is converted to electrical energy. I will then use the second parts of the systems are linked to achieve energy conversion.
The journal is divided into four major parts: 1) An introduction to working principles of existing wind systems, 2) How Contra rotating blade systems are used to increase efficiency,

Wind power has been revealed to be among the most promising renewable energy sources according to Habbas etal. (2011). Wind power systems can be used in connection with an electricity transmission and distribution system, or in stand-alone applications that are not connected to the utility grid and are appropriate for homes, farms, or even entire communities. According to Habash etal. (2011), wind turbines are a growing sector within electrical industry where small wind energy converters range in size from a few watts to thousands of watts which are usually applied to cater power demands in an economical way.

Wind mill consist of blades which rotates upon interacting with wind energy. Habash etal. (2011) explains that the turbulent flow from wind interacts with the landscape blade. This applies stress on the blade making it to rotate from it centre axis. The power rating is dependent on the size of the wind turbine. The larger the blade, the larger the span and hence more electricity is produced out of it. The major challenge to the wind system is making it as efficient as possible. One way to do this is to develop a turbine which operates at low speeds and cope up with the turbulent. At the centre of rotation of the blades, the blades are connected through gears to the induction motor.

The induction motor the alternating voltage is generated by rotating a coil in a magnetic field or by rotating a magnetic field within a stationary coil. The amount of volts produced in each of the two cases depends of the field strength, the speed at which the magnetic field or the coil rotates and the number of turns in the coil. Depending on the way the connections are made from the generator, electrical power produced can either be direct current (d.c) or alternating current (a.c). For D.C voltage to be produced, slip rings join the two ends of the coils. The slip rings are insulated from one another and from the middle shaft. For A.C energy to be produced slip rings have no insulations between the segments.

Habash etal. (2001) explains that when wind blows it spins the rotor. The blades are supported by the rotor. The blades are designed so as to capture as much moving wind as possible. Wind energy is converted to mechanical power when the rotating rotor is made to turns a shaft. Then, the shaft is used to drive a generator. The generator consists of rotating coil which upon rotation causes magnetic field, which induces current on conductor within which the coil rotates. As a result, electric power is generated on the conductor . Habash etal. (2001) also observed that for maximum power production, contra rotating system is used of wind can be achieved through proper instrumentation and experimental measurements. For these reasons the system is fitted with blade hub assembly coupling, bearings and gearbox in order to increase the efficiency and performance. Disc brakes are additional components in cooperated in the system. They are used to stop the rotary blades during maintenance of the system. In conclusion the above explanation discusses how wind energy is converted to electrical energy.

References

Habash W, Groza, V, Yang, Y, Blouin, C & Guillemette, P, 2011, ‘Performance of a contra rotating small wind energy converter’, Journal of Efficient Power Generation, Vol. 1, no. 1, pp. 2-8.