A large wind farm can consist of hundreds of wind turbines connected by a transmission system. Depending on the wind strength, there is a distance of four to ten rotor diameters between the individual wind turbines of a wind farm. In this way, the efficiency losses caused by turbine interference, the so-called wake-up effect, can be minimized. Today we will talk about the wind energy and also wind turbines that located in wind farm.
Wind speed of at least 4 m / s required in a wind farm
In low wind or calm, the turbines will switch to standby mode. However, as soon as a wind speed of at least 4 m / s is reached, the turbine automatically starts up again. Full utilization of the turbine is achieved with winds of 12 to 14 m / s. If the wind speed rises above 25 m / s, the turbine shuts off to prevent unnecessary wear.
The profitability of a wind farm is only guaranteed if it has a good orientation to the wind. After choosing a location, the geography – existing roads, power grids, proximity to residential areas, flora and fauna and possible restricted areas – is examined. One of the biggest challenges in building a wind turbine can often be gaining acceptance by local residents.
The wind energy system – that’s how a wind farm works
Wind is converted into electricity by the wind turbine. The wind turbines are often installed as a group on land or offshore.
The wind drives the rotor blades and the hub, which form the rotor. The turbine shaft is in turn connected to a generator located in the upper part of the tower. Between the rotor and the generator, a transmission is installed, which accelerates the rotation of the slow-running rotor to a speed suitable for the generator.
By means of an automatic system, the turbine is always turned in the direction of the wind. Thus, winds from different directions can be used to generate energy. The rotor blades of a turbine are usually made of extremely durable plastic, which is reinforced by glass fibers. Sometimes carbon-reinforced fibers are used. In the rotor blades a lightning protection system (UV light) is installed.
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