Current situation of new energy development and wind power generation in China

3 Wind power generation

3.1 Advantages of wind power generation

As one of the main ways of power generation, thermal power generation consumes a lot of energy. Coal resources are non-renewable resources, and every minute that is mined and burned is a minute less. Wind power, on the other hand, does not have to worry about being consumed, nor does it have to worry about air pollution after coal is burned. Wind power generation is the most environmentally friendly compared to other forms of power generation. The burning of coal for thermal power generation produces a large amount of carbon dioxide after combustion, which has a great impact on the greenhouse effect. Nuclear power generation also has high risks, such as the nuclear power plant leakage incident in Japan, which is fatal to human beings, other organisms and the environment. There is no doubt that wind power will play an increasing role in the energy production needs of society in the coming years. It is a cheap, clean, renewable, non-polluting source of energy. Plus, it can also generate electricity without needing any water; Solar energy also has these advantages. Although the wind speed is variable, the wind has no chance of running out.

Compared with traditional power generation, wind power is more greenhouse friendly and environmentally friendly. Taking the first offshore wind power station built in China as an example, the annual power generation of a single machine reaches 4.4 million KWH, while reducing carbon dioxide emissions of about 3,500 tons and sulfur dioxide 11 tons per year. According to statistics, in 2006, China's total power generation thermal power accounted for 83.2%, hydropower accounted for 14.7%, and thermal power fuel is basically coal, annual carbon dioxide emissions reached more than 3 billion tons, if vigorously promote wind power this renewable clean energy, annual carbon dioxide emissions reduction is very considerable, the greenhouse effect has slowed down. China is advanced in the use of energy resources, advocating the environmental protection concept of "Jinshan silver mountain is not as good as green water and green mountains". From the geographical environment and resources distribution analysis, our country has a great advantage in this respect. China's Xinjiang, Mongolia, Gansu and other places are located on the plateau, and most of the wind power stations are built in the northwest area, with a large amount of wind energy reserves. Offshore areas are vast, and wind energy resources can be fully utilized and not wasted. As the cleanest, most environmentally friendly and most efficient resource, wind energy has the highest development potential compared with other power generation methods. Wind farms can be classified into offshore and onshore according to geographical location. The wind condition at sea is better than that on land, and the change rate of wind speed in both magnitude and direction is lower, the turbulence intensity is smaller, and the fatigue load is lower. The life of the fan is effectively extended. Offshore wind power can be used for a high number of hours and is free from the constraints of population density.

The construction time of wind power equipment is very short, the installation time of a single unit only takes a few weeks, the construction time of 50,000 kilowatt capacity wind power generation is about half a year to a year, the installation mode of wind power generation is flexible, and every time the increase of funds and indicators, you can install new units. With the development of science and technology, more and more high-tech are used in wind turbines, and the safety of wind turbines is getting higher and higher. Unit life can be up to 20 years. At present, the unit installed capacity cost of medium-sized wind turbines has been close to thermal power, lower than oil and nuclear power. If you consider the transportation costs and environmental protection costs of coal power, then wind power is currently the cheapest energy source. The operation and maintenance of wind turbines is relatively simple, and its level of automation is high. The actual area of the wind turbine is also relatively small, and wind power can form complementary systems with other forms of energy generation such as photovoltaic, hydropower, etc., and can also be operated separately, and the distributed layout is very advantageous.

3.2 Principle of wind power generation

Wind power generation is the use of wind to drive the rotation of windmill blades and increase the rotation speed through the acceleration machine, so as to drive the generator to generate electricity.