An excitation control device for an independent power generation system of a brushless doubly-fed motor

Abstract

An excitation control device for a brushless doubly-fed motor independent power generation system, which belongs to a brushless doubly-fed motor power generation control device, overcomes the poor dynamic performance of the existing scalar control method and the complexity, high cost and high efficiency of the dual synchronous rotating coordinate system vector control method low defect. The invention includes a PW voltage amplitude controller, a PW voltage frequency controller, a CW current vector controller, an LC filter, a rotational speed calculator, a CW current frequency feedforward calculator, a PW voltage phase-locked loop and a PW current converter. In the present invention, the CW current vector controller of the brushless doubly-fed motor is used as the inner loop, and the PW voltage amplitude controller and the PW voltage-frequency controller of the brushless doubly-fed motor are used as the outer loop to realize the independent control of the PW voltage amplitude and frequency. Control, and introduce cross feed-forward compensation in the CW current vector controller, so that it has faster response speed and better steady-state accuracy. The constant frequency and constant voltage power generation function of the brushless doubly-fed motor independent power generation system under the condition of variable speed and variable load is realized.

Description

technical field [0001] The invention belongs to a power generation control device for a brushless double-fed motor, in particular to an excitation control device for an independent power generation system of a brushless double-fed motor. Background technique [0002] Brushless double-fed motor is a new type of AC induction motor developed in recent years. Compared with brushed double-fed motor, brushless double-fed motor cancels the brush and slip ring, and has the advantages of simple structure and high reliability. It can realize both independent power generation and grid-connected power generation, and has significant application advantages in the fields of ship shaft power generation, wind power generation, and hydropower generation. The brushless double-fed motor has two sets of stator windings with different numbers of pole pairs and a special rotor. These two sets of stator windings are respectively called power winding (hereinafter referred to as PW) and control win...

AI Technical Summary

Problems solved by technology

[0011] The invention proposes an excitation control device for an independent power generation system of a brushless doubly-fed motor, which overcomes the defects of poor dynamic performance of the existing scalar control method and complex, high cost and low efficiency of the dual synchronous rotating coordinate system vector control method, so as to realize no Constant frequency and constant voltage power generation function of brush doubly-fed motor independent power generation system under variable speed and variable load operating conditions

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