Variable speed and variable frequency wind power generator excitation control system

Abstract

This invention relates to a control system for a telescopic double-rotor wind motor and its excitation control method, in which, a magnet inner rotor rotating against the stator is set on a sub-drive shaft of the generator, a ring rotor rotating to the stator is set on the main driving shaft of the generator, a main vane rev test device and a sub-vane rev test device are set on the main and the sub vanes and capable of transmitting the rev signal to the integrated control device of the set, the set integrated control device has a port connected with the wind speed test device, a port connected with a wind direction test device and a port transmitting data with a PC, the crab controller and the set integrated control device are connected in the mode of controlling rotation of wind direction under the main vane.

Description

technical field [0001] The invention relates to the excitation control technology of a wind power generator, in particular to an excitation control system and an excitation control mode of a variable-speed variable-frequency generator with a telescopic double-rotor excitation structure. Background technique [0002] Known technology such as Chinese patent CN200510022771.1 discloses that the present invention discloses a variable speed and constant frequency method for wind power generation. The power Pw is input to the input shaft of the differential permanent magnet motor, and the differential mechanism of the differential permanent magnet motor performs power division or confluence to generate power flow Pg, which enters the stator winding of the differential permanent magnet motor and realizes constant speed and constant frequency power generation to the power grid through the feeder . Compared with the traditional method of variable speed and constant frequency, the pre...

AI Technical Summary

Problems solved by technology

[0005] It is known that the wind turbine transmits the power generated by the wind rotor under the action of the wind to the generator through the gearbox and makes it obtain a corresponding speed; usually the speed of the wind rotor is very low, which is far below the power generation required by the high-speed generator The speed must be realized through the acceleration of the gear pair of the gearbox; while the working conditions of the wind turbine unit are generally very poor, frequent failures of the gearbox are common

[0006] Products manufactured by conventional technologies have poor reliability, high maintenance costs, and low unit efficiency

Images