Variablespeed Operation

If the speed of the rotor can be continuously adjusted such that the tip speed ratio remains constant at the level which gives the maximum CP then the efficiency of the turbine will be significantly increased. Active pitch control is necessary to maintain a constant tip speed ratio but only in the process of adjustment of rotational speed; the pitch angle should always return to the optimum setting for highest efficiency. Pitch control regulation is also required in conditions above the rated wind speed when the rotational speed is kept constant.

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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