1. The overall overview of wind power is as follows: Around 2007, China’s wind power market was particularly open. However, after 2011, due to excess wind power capacity, the State Council’s support for wind power declined. Until now, China’s The wind power market is very difficult, and many companies are not performing well.
2. Technical level:
1) The main reason is that the reliability is too low. The general design life is 20 years. Major failures will occur in about 4 to 5 years of domestic operation. We As we all know, the maintenance cost of wind power equipment is extremely high.
2) There is another serious phenomenon: many domestic wind power equipment companies do not have independent research and development capabilities, and most of them buy foreign drawings and process them. Then we have a question, why the wind power equipment with the same drawing can operate for 10 years abroad but can only operate for four years in China. The reasons: a) The service environment of domestic and foreign wind power equipment is different, and the service environment in China is poor. It will accelerate the erosion of the equipment, thereby accelerating fatigue damage. b) Domestic manufacturing processes are not as good as foreign ones. It can be said that domestic wind power equipment manufacturing does not meet the design requirements.
3) Main damage conditions: the blades are mainly affected by environmental erosion and breakage; the speed increase box is mainly caused by fatigue damage of bearings and gears; the brakes are mainly caused by braking noise and material wear; the power grid is mainly caused by the failure of power generation. stability, causing fluctuations in the power grid.
3. New power generation method: The current innovation in wind power equipment types mainly focuses on the gearbox. What is more commonly used now is the doubly-fed speed-increasing box, that is, the low speed transmitted from the blades is passed through The speed increase of the gearbox is transmitted to the generator to generate electricity. This traditional equipment type will affect the service life of the entire equipment system due to the reliability of the gearbox. The new wind power equipment is direct drive, that is, there is no speed increase box. In terms of the reliability of the entire equipment, the service life is more guaranteed, but the power generation efficiency needs to be studied.
Hope this helps!
Hazards of wind power generation
The impact of wind power generation on the environment is as follows:
1. Noise pollution, visual pollution (disadvantages);
2. Occupying a large area of land (disadvantage);
3. Affecting birds (disadvantage).
Because wind power does pollute the environment. Noise, land, and animals all fall under the category of environment. Therefore, there are relevant reports on the environmental pollution caused by wind power generation.
Extended information
Types of environmental pollution
Classified into chemical pollution, biological pollution, physical pollution (noise pollution, radioactive pollution, Electromagnetic wave pollution, etc.) solid waste pollution, liquid waste pollution, energy pollution.
Land pollution: Garbage cleanup has become an important issue in major cities. Among the tens of millions of tons of garbage every day, many cannot be incinerated or corrupted, such as plastics, rubber, glass and other human beings’ No. 1 enemy.
Criminal cases targeting environmental pollution are being handledTo solve the problems of difficulty in obtaining evidence, identification and identification, etc., the Supreme People's Court and the Supreme People's Procuratorate issued a judicial interpretation "Interpretation on Several Issues Concerning the Application of Laws in the Handling of Criminal Cases of Environmental Pollution".
New provisions have been made on the standards for conviction and sentencing of environmental pollution crimes to severely punish and prevent environmental pollution. According to the "Interpretation", causing serious injuries to one or more people or minor injuries to three or more people constitutes "serious pollution of the environment" and will be investigated for criminal liability for the crime of environmental pollution.
Baidu Encyclopedia - Wind Power
Baidu Encyclopedia - Environmental Pollution
What impact do wind power projects have on the ecological environment?
It destroys the local ecological environment, destroys vegetation, electromagnetic radiation affects habitation, consumes wind energy, affects climate change, produces noise hazards, and corrosion and cracks on the blade surface can easily cause blade breakage and cause accidents.
Wind power generation will harm the local ecological environment, such as destroying vegetation, changing the topography, causing soil erosion and desertification. The electromagnetic radiation produced by wind power affects human habitation. An alternating electromagnetic radiation field is formed around high-voltage transmission lines and affects human health.
Wind power affects local climate. Wind power uses wind energy in the atmosphere. The power generation process of wind turbines consumes part of the wind energy in the atmosphere and brings about climate changes.
The impact of wind power projects on the ecological environment:
1. Project construction will affect the local ecological environment, such as destroying vegetation, changing the topography, and causing soil erosion.
2. It has some effects on insects and livestock. Birds and insects die more. Livestock will feel dizzy just like people when they see the impeller rotating.
3. Produce noise pollution. The noise of wind turbines mainly comes from the noise generated by the generator, gearbox and blades cutting air.
4. Project operations will produce electromagnetic radiation effects.
5. Project land acquisition may cause social problems.
6. The project construction may have a landscape impact on local cultural relics.
7. Affect the habitat and migration of birds. As the wind turbine capacity increases, its swept area and height increase. When the wind turbine is installed on the flight path of birds, the birds may hit the moving blades during flight and die.
8. Some foreign environmental protection workers are opposed to the construction of wind turbines in coastal landscape areas and pastoral areas, believing that it will destroy the coastal landscape and pastoral scenery and is a kind of visual pollution.
9. The impact on the ecology, water and atmosphere caused by the supporting projects of the project, such as roads, living areas, etc., should also be considered. Building a wind power plant requires occupying land to build wind turbine foundations and roads, transmitting wind power to electricity, and erecting transmission lines, etc., which will have a certain impact on the lives of local residents.
1. Wind power generation converts the kinetic energy of wind into electrical energy. Wind is a new species with great potentialenergy. Wind has been used by people for a long time, mainly through windmills to pump water, grind flour, etc. Now, people are interested in how to use wind to generate electricity.
2. Specifically, wind power generation converts the kinetic energy of the wind into mechanical kinetic energy, and then converts the mechanical energy into electrical kinetic energy. This is wind power generation. The principle of wind power generation is to use wind power to drive the windmill blades to rotate, and then use a speed increaser to increase the speed of rotation to prompt the generator to generate electricity.