Wind turbines are shut down for faults such as loss of load, vibration, loss of phase, current or voltage anomalies, etc. Each of these safety features could save the unit, but the most important feature is a method of controlling the rotor when there is a loss of load (fault on the utility grid) during high winds (overspeed control). If the unit is not shut down within a few seconds, it will reach such high power levels that it cannot be shut down and will self-destruct. The large torque excursions and also the emergency application of mechanical brakes may damage the gearbox. Faults result in power spikes, large current, and voltage drops.

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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