Читать книгу Wind Energy Handbook - Michael Barton Graham - Страница 98

The majority of wind turbines currently installed generate electricity. Whether or not these turbines are grid connected, they need to produce an electricity supply that is of constant frequency else many common appliances will not function properly. Consequently, a mode favoured in the early years of wind turbine development has been operation at constant rotational speed. Connected to the grid a constant‐speed turbine is automatically controlled, whereas a stand‐alone machine needs to have speed control and a means of dumping excess power.