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1、 Wind PowerCollege of Information and Electrical Engineering LinQi Ma Power PrinciplesAir flowwindmill spinning actionthrough the shaft,the rotor(driven by a fan to force air component)of the rotary power transmitted to the generator to produce electricityEconomy In recent years,generally speaking,t
2、he use of wind to generate electricity has reduced the cost of many,even without other external costs,many suitable locations in the cost of wind power generation has been lower than the internal combustion engine fuel.Since 2004,wind power has become the cheapest in the new energy of all.In 2005,th
3、e cost of wind energy has been reduced to one-fifth of the 1990s,and with the use of high-wattage generators will continue downward trend.Global wind power capacity in 2007 grew 24 percent to 59.1 million kilowatts.More than 10 years ago,less than 5 million kilowatts up 12 times.Wind is the worlds f
4、astest growing energy.Over the past 10 years the average annual growth is rate of 29%.By contrast,the same period grew by 2.5%per year coal,nuclear power 1.8 percent,2.5 percent natural gas,oil,electricity generation increased by 1.7%.development of economic competitiveness and potential land and ec
5、ological damage on the lower.air pollution and less carbon emissions and other environmental costs are low.wind power can be distributed generation,power generation facilities is not too large concentration of riskAdvantages of wind powerAdvantages of wind powerDisadvantage of wind power Disadvantag
6、e of wind power Wind power generation in the ecological problem is likely to interfere with birds.The current solution is to shore power.offshore power generation efficiency is high,but higher prices.In some areas,the economics of wind power has shortage,there are many areas of intermittent wind req
7、uires a lot of land to build wind farms wind turbine noise will be a huge issueGrid Feature Small wind farm and the main network may lead to decline in the quality of power in some areas,such as harmonics,flicker,voltage and reactive power management more difficult.There are two ways to solve these
8、problems:1,Fans and control technology to improve2,the strengthening of the local network,configure the appropriate reactive power compensation or voltage regulation equipment.Medium-sized wind farm(50MW or more)and small wind power is different from that in general the size of farms direct access t
9、o the transmission grid.In this case,the grid requirements for wind power from the power quality has been further developed to the transient stability and automatic recovery after the accident,frequency regulator,direct scheduling capabilities.Global Development Status Since the 1980s Wind power in
10、Europe and America has been by the national attention.so far the worlds wind power generating capacity at an annual rate of 30%of the amazing rapid growth.Many countries and regions has been the development of wind power plants in the area of tourism We can see from the tree next to its approximate size