Site requirements for wind power plants:
1: Generally, the annual average wind speed should be greater than 6 meters/second (at a height of 60-70 meters) and greater than 5 .8 meters. /second in mountainous areas.
2: The cumulative number of hours in a year with wind speeds of 3 to 25 meters/second is more than 2,000 hours (3,000 to 5,000). 3: The effective average annual density of wind energy is more than 150 watts/square meter.
4: The average spacing of each machine is 4 to 6 times the blade diameter.
5: The grid connection conditions are good and the wind farm must not be more than 20 kilometers from the connected electricity grid.
6: More than 300 meters from residential areas.
7: At present, the unit investment in wind power projects is 7,000-10,000 yuan/kilowatt, and the investment in wind power plant is 50,000 kilowattlowatts is about 400 to 500 million yuan.
8: For the development of wind power plants, the local municipal government first signs a cooperation agreement with the company that intends to invest in the development. The company will carry out preliminary wind measurement work depending on the extent. specified in the agreement. After obtaining the wind measurement data, carry out the project demonstration work. If the demonstration can meet the development requirements, the corresponding approval procedures can be initiated and the preparation of the pre-feasibility study and associated preliminary works can be carried out. Once the pre-feasibility study review is passed, the feasibility study report and other special reports can be prepared. Once completed, the project will be submitted to the development and reform commission of the province or autonomous region, and the province will ironon request to the National Energy Agency. Administration for approval. Once approval is obtained, construction of the project can begin. The entire project cycle, from start to production, takes approximately four years.
9: In addition, a series of factors such as electricity price, wind direction, topography, geology, climate, environment and road traffic must also be taken into account into account.
When building a wind farm, weather conditions as well as social and natural conditions must first be taken into account.
1. Weather conditions?
1.1. The quality of wind energy must be high. The primary condition for a wind farm site must be abundant wind energy resources. The annual average wind speed is more than 5 m/s, the effective wind hours at a height of 30 m are more than 6,000 hours, and the effective densityof wind energy is greater than 240 W/m^2.
In fact, the factors that affect the quality of wind power include the average annual wind speed, average wind power density, wind frequency distribution, available hours of effective wind speed, stability of wind direction, etc. ?
1.2. The prevailing wind direction at the wind farm site is stable. Stable wind direction can not only increase the utilization of wind energy, but also extend the lifespan of wind turbines. ?
1.3. The degree of turbulence in wind farms must be low. The wind is random and affected by the roughness of the site surface and nearby obstacles. The formation of turbulence in the wind field is usually caused by a wind channel that is too rough or by sudden changes in wind speed and direction caused by obstacles. This will not only affectthe efficiency of the wind turbine, but will also cause vibrations and uneven loading of the wind turbine, reduce the life of the wind turbine and, in severe cases, could cause accidents in which the blades fly away. ?
1.4. There should be fewer natural disasters at wind energy production sites. Strong wind, hail, thunderStorms, earthquakes, etc. will all have an impact on wind turbines. ?
2. Social and natural conditions?
2.1. The terrain of the wind farm site must be relatively flat and the geological conditions must be good to facilitate civil construction. ?
2.2. Convenient transportation. It is necessary to determine whether the provision of equipment and transportation of key construction materials of the proposed wind farm is practical. Is it suitable for building and transporting large cranes and flatbed trucks? ?
2.3. The wind farm must be as closee as possible from the network access point. For example: near existing 10 KV and 66 KV substations and lines to reduce power loss and delivery project costs. Occupy as little cultivated land as possible to reduce ecological damage. ?
2.4. Surrounding environment. The construction of wind farms generally affects the normal life and migration of birds and birds. In order to protect the ecology, the site should try to avoid bird flight routes, migratory birds and animal habitats, etc., and stay away from nature reserves. military installations and densely populated areas, etc.