What is Wind Power ?
Wind power is extracted from air flow using wind turbines or sails to produce mechanical or electrical power. Windmills are used to produce mechanical power, wind pumps for pumping the water, and sails to propel ships. Wind power is a alternative to fossil fuels. It is plentiful, renewable, clean, produces no greenhouse gases during operation, and uses little land. The effects on the environment due to wind power are less than those of nonrenewable power sources.
S.No. |
Voltage (V) |
Current (A) |
Power (p) watts |
Energy E1 = PTJ |
% Error |
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Readings observed from the test |
Wind farms consist of many individual wind turbines which are connected to the electric power transmission lines. Onshore wind is a inexpensive source of electricity, compared to coal gas or fossil fuel plants. Offshore wind is steadier and stronger on land, and offshore farms have less impact, but construction and maintenance costs are considerably higher. Small onshore wind farms can feed some energy and can provide some electricity to isolated off-grid locations.
Working Principle of Wind Power :
The brakes are released when power is required. The blades rotate due to the wind. The main shaft connected to the gear box which multiplies the speed to 20 or 30 times. This relatively high speed shaft runs the generator to produce electricity. The generator may be a AC or DC depending upon the application or the wind mill. Usually a battery on the ground is used to store the power.
If ac generator is used a converter is provided to change from AC to DC. Such a wind driven generators power is usually limited to few hundred watt to 100123451234 kW. If the site is suitable for more number of wind mills then it is known as wind farm. The power produced from wind farm will be connected to the grid.
