Self-closed type electromagnetic coupling speed-regulating wind generator set and control method thereof

Abstract

The invention provides a self-closed type electromagnetic coupling speed-regulating wind generator set and a control method thereof. The self-closed type electromagnetic coupling speed-regulating wind generator set solves the problem that current double-fed type and full-power conversion type wind generator sets are different in gird-connected interfaces compared with a synchronous generator set in a conventional power plant. According to the self-closed type electromagnetic coupling speed-regulating wind generator set provided by the invention, a self-closed type electromagnetic coupling speed-regulating device is connected to the high-speed shaft of a gear case and the rotor shaft of an electro-magnetic synchronous generator, so that power is transmitted to the side of the electro-magnetic synchronous generator from the side of the gear case, and the gird-connected interface is the electro-magnetic synchronous generator. According to the self-closed type electromagnetic coupling speed-regulating wind generator set and the control method thereof provided by the invention, the pollution of the wind generator set possibly caused to a power grid due to the fact that a frequency converter is connected with the power grid is avoided, the unification of the grid-connected interfaces in the wind generator set and the conventional power plant is realized, a power grid environmentally-friendly target of the wind generator set is really realized, and the promotion of further development of the clean energy, namely wind power, is facilitated.

Description

technical field [0001] The invention relates to the field of wind power, in particular to a self-enclosed electromagnetic coupling speed-regulating wind turbine and a control method for the self-enclosed electromagnetic coupling speed-regulating wind turbine. Background technique [0002] The current mainstream wind turbines are doubly-fed and full-power conversion wind turbines, both of which can change the speed of the wind rotor with the change of wind speed, thereby realizing the ability to capture wind energy to the maximum. However, as the proportion of wind power in the power grid increases, the demand for wind turbines to participate in supporting the voltage and frequency of the power grid continues to increase. In these two aspects, the current wind power generation unit has shortcomings compared with conventional power generation units. [0003] In terms of grid voltage support, the stator of the generator in the doubly-fed wind turbine is directly connected to th...

AI Technical Summary

Problems solved by technology

Due to the use of converters in double-fed and full-power conversion wind turbines, the decoupling between the generator and the grid is achieved, which causes the decoupling between the wind rotor speed of the wind turbine and the grid frequency, so The application of current mainstream wind turbines has resulted in the reduction of grid inertia and the decrease of grid frequency stability

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