Variable-speed constant frequency electricity generation control device and electricity generation method based on brushless doubly-fed motor

Abstract

The invention relates to a variable-speed constant frequency electricity generation control device and electricity generation method based on a brushless doubly-fed motor. The device comprises a double-PWM frequency conversion system and an electricity generation control system for controlling the double-PWM frequency conversion system. The electricity generation control system comprises a setting unit, a power winding voltage detection unit, a control winding current detection unit, a voltage outer loop controller, a current inner loop controller and a phase-locked loop controller, and the voltage outer loop controller, the current inner loop controller and the phase-locked loop controller drive a PWM rectifier and a PWM inverter to achieve system variable-speed constant frequency electricity generation in a space vector control mode. By the adoption of the vector control mode, the double-closed-loop feedback control method and the phased-locked loop control method, even though loads or prime power changes and causes fluctuation of rotation speed, current and frequencies of windings can be controlled by accurately adjusting the brushless doubly-fed motor, so that the electricity generation voltage amplitude and the frequencies on the power winding side keep stable, the control process is simple, and the device and the method are applicable to wide use.

Description

technical field [0001] The invention relates to a variable-speed constant-frequency power generation control device and a power generation method, in particular to a variable-speed constant-frequency power generation control device based on a brushless double-fed motor. Background technique [0002] In variable-speed constant-frequency power generation systems, brushed doubly-fed motors using AC excitation technology are widely used due to the advantages of simple motor control and mature manufacturing technology. However, due to the existence of brushes in brushed doubly-fed motors, they are easily damaged and difficult to maintain. In order to overcome the above problems, brushless double-fed motors have begun to attract people's attention. This brushless double-fed motor eliminates the need for brushes and slip ring structures, and has the advantages of convenient maintenance, high control precision, and reliable performance. In addition, since the stator winding of the b...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a variable-speed constant-frequency power generation control device and power generation method based on a brushless double-fed motor, which solves the difficulty in controlling the variable-speed constant-frequency power generation process using a brushless double-fed motor in the prior art technical issues

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