These alternative configurations may also include power converters that are used to convert the frequencies as described above and transmit electrical power between the utility grid and the generator.Īt least some known electric utility grids include one or more series-compensated transmission lines. Alternatively, some wind turbine configurations include, without limitation, alternative types of induction generators, permanent magnet (PM) synchronous generators, electrically-excited synchronous generators, and switched reluctance generators.

Moreover, such converters, in conjunction with the DFAG, also transmit electric power between the utility grid and the generator as well as transmit generator excitation power to a wound generator rotor from one of the connections to the electric utility grid.

Such configurations may also include power converters that are used to convert a frequency of generated electric power to a frequency substantially similar to a utility grid frequency. Some wind turbine configurations include doubly-fed asynchronous generators (DFAGs). Gearless direct drive wind turbines also exist.

More specifically, the gearbox steps up the inherently low rotational speed of the rotor for the generator to efficiently convert the rotational mechanical energy to electrical energy, which is fed into a utility grid via at least one electrical connection. The lift force generates torque on the main rotor shaft, which is geared to the generator for producing electricity. Consequently, a lift force, which is directed from a pressure side towards a suction side, acts on the blade. For example, rotor blades typically have the cross-sectional profile of an airfoil such that, during operation, air flows over the blade producing a pressure difference between the sides. The rotor blades capture kinetic energy of wind using known airfoil principles. A modern wind turbine typically includes a tower, a generator, a gearbox, a nacelle, and one or more rotor blades. Wind power is considered one of the cleanest, most environmentally friendly energy sources presently available, and wind turbines have gained increased attention in this regard. The present disclosure relates generally to electrical power systems and, more particularly, to a system and method for controlling voltage of a DC link of a power converter for an electrical power system, such as a wind turbine power system.

Ssci digital optical converter