tailieunhanh - Rahman, Saifur “Electric Power Generation: Non-Conventional Methods” The Electric Power

The wind is a free, clean, and inexhaustible energy source. It has served humankind well for many centuries by propelling ships and driving wind turbines to grind grain and pump water. Denmark was the first country to use. | Rahman Saifur Electric Power Generation Non-Conventional Methods The Electric Power Engineering Handbook Ed. . Grigsby Boca Raton CRC Press LLC 2001 1 Electric Power Generation Non-Conventional Methods Saifur Rahman Virginia Tech Wind Power Gary L. Johnson Advanced Energy Technologies Saifur Rahman Photovoltaics Roger A. Messenger 2001 CRC Press LLC 1 Electric Power Generation Non-Conventional Methods Gary L. Johnson Kansas State University Saifur Rahman Virginia Tech Roger A. Messenger Florida Atlantic University Wind Power Applications Wind Variability Advanced Energy Technologies Storage Systems Fuel Cells Summary Photovoltaics Types of PV Cells PV Applications Wind Power Gary L. Johnson The wind is a free clean and inexhaustible energy source. It has served humankind well for many centuries by propelling ships and driving wind turbines to grind grain and pump water. Denmark was the first country to use wind for generation of electricity. The Danes were using a 23-m diameter wind turbine in 1890 to generate electricity. By 1910 several hundred units with capacities of 5 to 25 kW were in operation in Denmark Johnson 1985 . By about 1925 commercial wind-electric plants using two-and three-bladed propellers appeared on the American market. The most common brands were Wincharger 200 to 1200 W and Jacobs to 3 kW . These were used on farms to charge storage batteries which were then used to operate radios lights and small appliances with voltage ratings of 12 32 or 110 volts. A good selection of 32-VDC appliances was developed by the industry to meet this demand. In addition to home wind-electric generation a number of utilities around the world have built larger wind turbines to supply power to their customers. The largest wind turbine built before the late 1970s was a 1250-kW machine built on Grandpa s Knob near Rutland Vermont in 1941. This turbine called the Smith-Putnam machine had a tower that was 34 m high and a rotor 53 m in