Excitation circuit for dual feedback asynchronous wind force generator unit

Abstract

The invention discloses an excitation circuit of a double-feed asynchronous wind turbine, which includes an energy converter and a controller. The energy converter includes a commutating unit, an energy dissipating unit, an inverting unit, and a drive circuit. The commutating unit is connected with the inverting unit; the input end of the commutating unit acting as the input end of the energy converter 14 is connected with the secondary edge of a transformer; the output end of the inverting unit is connected with the output end of the energy dissipating unit, and is connected with the input end of a rotor contact as the output end of the energy converter. The output end of a digital signal processor of the controller is connected to the input end of the inverting unit after being seriallyconnected into the drive circuit. The invention has the advantages that the cost of the hardware is lowered greatly, the complexity of the control arithmetic of the low-excitation circuit is lowered obviously; the separate adjustments of the active power and the reactive power in the wide rotation speed range are realized, and the factors of the outputted power of the generator can be adjusted and controlled.

Description

technical field [0001] The invention relates to a variable-speed constant-frequency double-fed asynchronous wind-driven generating set, and in particular to an excitation circuit of a double-fed asynchronous wind-driven generating set. Background technique [0002] The variable-speed constant-frequency double-fed asynchronous wind power generating set in the prior art includes: a fan, a winding-type asynchronous generator connected to the fan, the rotor winding of the generator is connected to an energy converter, and the energy converter is connected to a controller, and the controller and the energy conversion The generator constitutes the excitation circuit of the doubly-fed asynchronous wind power generator set, and the electric energy generated by the generator is incorporated into the grid. [0003] image 3 It is a circuit connection block diagram of an energy converter in the prior art. like image 3 As shown, the energy converter 20 in the excitation circuit of the...

AI Technical Summary

Problems solved by technology

[0004] The defects of the excitation circuit of the above prior art are: many controllable power electronic devices are required, the cost of the converter is high, and the control technology is complicated

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