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The service life of each product is different. For example, if we can take care and maintain your products during use, their service life is still very long, but we don`t know how to let them rest, let them work endlessly, or how to maintain them during use Generally, its service life will become very short, no matter what kind of product it has, it has a certain service life, and how long the service life of a wind turbine is, this is also a problem that many people want to understand. In fact, if we want to really use it, then we can also do some good maintenance in our lives, for example, understand some of the working principles of some of them, and also know some of his needs. If you can do maintenance at any time, you It can be used for a long time. Even if we use wind turbines, we still want to know its service life. For example, we use mobile phones in our lives. If we let it work endlessly or use it often, it is very likely that its service life will be short, but if we let it rest occasionally or do a good job in maintaining our life, don`t let it fall to the ground often, then his The service life will become very long. In the process of using the fixed position of the wind turbine, we have nothing to do with it, or do not change its position at will, in fact, it can make better use of its service life. Although the service life of each product is different, for many families who use wind turbines, they don't have to worry about how long its service life is, because it is still used for a long time. Sometimes some problems may not affect its normal use. In fact, there are some minor issues. I think we need some maintenance or some minor changes to make it work properly, so after buying a wind turbine, we'd better let it work normally in one place for a long time. It can also provide us with better motivation.

We usually call wind turbines below 10KW as small wind turbines. Compared with medium-sized and large-scale wind turbines, small wind turbines have the advantages of being compact and flexible, simple and convenient in installation, low cost, low starting wind speed requirements, high cost performance, and can complement photovoltaic and other power generation equipment. In recent years, as renewable energy-wind energy has attracted more and more attention, small wind turbines have become the first choice of farmers and herdsmen, and they have also played a great role in the energy-saving transformation of urban construction, urban residents, and enterprises and institutions. . Then, in addition to wind resources, power consumption, inverters and batteries, and how to install them, the choice of small wind turbines themselves is the key. In this regard, the following points are put forward for our reference. 1. Wind blade: It is best to strengthen the glass fiber reinforced plastic blade, which has the advantages of corrosion resistance, high strength, and good installation. 2. Bearings: imported bearings, with high working efficiency, wear resistance, long service life and long service life. 3. Magnets: Magnets use rare earth neodymium iron boron permanent magnets, which have high efficiency, light weight, low energy consumption and large output power. 4. Anti-Strong Wind Tail Plane: It is best to have a rudder pre-deflection plan, so that it can automatically and accurately align the windward direction to improve the output power while taking into account adjustment and strong wind maintenance. 6. Connection method: It is best to use casing connection, which has high safety, no runaway phenomenon, and the installation industry is very convenient. It is important to know that installing a fan in the field is not only a technical task, but also a physical task. The ease of installation is a boon for the on-site installers. The above items to be noted when choosing a small wind turbine are expected to help us easily choose a wind turbine that suits us.

With the popularity of wind turbines, many areas with good wind energy resources are installing household wind turbines. How about small domestic wind turbines? Is it cost-effective? Let's compare the data. 1000W household wind turbine Purchase cost: 1500-1800 yuan, we will calculate it at 1600 yuan A household consumes more than 10- 20 kWh of electricity per day, and 15 kWh per day At present, the national one-time electricity consumption is 0.52 yuan, about 7.8 yuan a day, and 2847 yuan a year. We charge 3000 yuan per year If a 1000W generator works 12 hours a day (actually more than 12 hours), it will generate 12 kWh per day, which is 3 degrees different from 15 kWh per day. Annual power generation is about 2300 yuan The service life of wind turbines is generally more than 10 years, and normal maintenance can reach 20 years. Calculated by the minimum 10 years, we actually get 23,000 yuan, which is equivalent to the cost of investment in the first year, and the next 6 years are free, not to mention the actual service life is more than 10 years. In summary, the installation of small wind turbines is very practical and cost-effective. Wind energy is an energy-saving and environmentally-friendly renewable resource, and it also responds to national requirements.

The overall cost of a wind turbine: The initial construction investment of wind power is huge. Take domestic wind farms as an example: A 2MW wind turbine, the purchase cost of the wind turbine is about 7.2-8.5 million/unit, and the wind tower column is welded in sections on site. The foundation of the wind tower with a height of 65m or more requires a large amount of concrete as the pile foundation. The weight of a tower is more than 200 tons. The construction cost of a single tower column is about 2 million yuan. Therefore, without calculating the operation and maintenance network and the supporting settings of the entire wind farm, simply calculating the cost of a wind turbine is as high as 9-10 million. This is also a commonly used 2MW wind turbine. According to the current wind power market: the cost of 1.5MW units is around 3300 yuan/kW, and the average price of medium-megawatt units above 3MW is close to 4,000 yuan/kW. With the development of time, the price fluctuates, but there is not much difference. Nowadays, in areas with relatively high-quality wind farms, such as coastal wind farms, basically all wind turbines are 3MW, even 5MW, 6MW, or more than 7MW. Knowledge points: 1MW=1000KW=1000,000W. A wind farm has 10-20 generator sets under normal conditions, and the cost of a power plant is about 150-300 million yuan. (Don't look at the big windmills, the cost is not affordable for ordinary small businesses)

Speaking of wind turbines, these two years have been very popular in the industry (especially high-power offshore wind power). So what is the difference between a magnetic levitation wind turbine and it? What are the characteristics of magnetic levitation wind turbines? What structure? What are the technical difficulties? Let's take a look. 1. Structural features and principles The working principle of the magnetic levitation wind turbine is that the whole or part of the rotating shaft system of the generator is suspended in space through magnetic bearings. The wind drives the blades and the entire rotating shaft system to rotate. The mechanical energy is converted into electrical energy by the generator, and finally the electrical energy generated by the generator is transformed by power electronics. Converter into usable electrical energy. In addition to the advantages of energy saving and environmental protection, the most important feature of the magnetic levitation wind turbine is the low starting wind speed (1.5-2.5m/s); stable operation, no noise, and long service life; it does not require high space and can be used in urban areas, Used in suburbs and coastal mountainous areas. According to the relative position of the wind shaft and the ground, magnetic levitation wind turbines are divided into horizontal axis wind turbines and vertical axis wind turbines. Due to the many advantages of vertical axis wind turbines, it has been extensively developed in recent years. 2. The key technology of magnetic levitation wind turbine research Wind turbine blade technology Including the shape and structure design (the common shapes of wind turbine blades are arc, straight, wing and torsion) and material selection (aluminum alloy chord blades, steel blades, glass fiber reinforced plastic blades, etc.). At present, glass fiber reinforced plastic composite materials are widely used). Magnetic levitation support technology At present, the bearings used in the support technology of magnetic levitation wind turbines are mainly divided into mechanical bearings, active magnetic bearings, hybrid magnetic bearings and passive magnetic bearings. The purpose of choosing different support methods is to reduce the friction between the bearings, minimize the mass, and improve the efficiency of wind energy conversion. Energy storage technology In order to reduce the impact of the intermittency and volatility of wind power on the stability of the power grid, my country has built large energy storage stations in areas where wind power is concentrated. Using the two-way adjustment function of the energy storage station, the remaining power of the grid is absorbed to the trough, the wind power is converted into high-quality electric energy for storage, and the abandonment of wind power is reduced. Thereby improving the safety and stability of grid operation and the utilization rate of wind generators, reducing wind power abandonment, and increasing the proportion of clean energy power generation. At present, the main energy storage methods are physical energy storage, electrochemical energy storage and electromagnetic energy storage. Physical energy storage is divided into pumped water energy storage, compressed air energy storage and flywheel energy storage. Electrochemical energy storage equipment includes battery energy storage, fuel cell energy storage, lithium ion batteries, etc.; electromagnetic energy storage is mainly superconducting magnetic energy storage. In addition, it also includes generator technology (application of permanent magnet synchronous motor), control technology (wind turbine control technology, magnetic levitation control technology) and so on.