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Unbalanced voltage compensation device and method for brushless doubly-fed induction generator

A double-fed induction and balanced voltage technology, which is applied in the direction of generator control circuit, generator control, motor generator control, etc., can solve the problems that the PW voltage amplitude and frequency cannot be kept constant, and constant voltage and constant frequency power generation cannot be realized.

Active Publication Date: 2020-12-29
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In view of the defects of the prior art, the object of the present invention is to provide a device and method for compensating the unbalanced voltage of a brushless doubly-fed induction generator. It is impossible to guarantee that the PW voltage amplitude and frequency are constant, and thus the problem of constant voltage and constant frequency power generation cannot be realized

Method used

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  • Unbalanced voltage compensation device and method for brushless doubly-fed induction generator
  • Unbalanced voltage compensation device and method for brushless doubly-fed induction generator
  • Unbalanced voltage compensation device and method for brushless doubly-fed induction generator

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Embodiment

[0129] Such as figure 1 As shown, this embodiment discloses an unbalanced voltage compensation device, which is applied to a brushless doubly-fed induction generator independent power generation system for reactive power, and specifically includes a PW voltage controller, a CW conversion angle generator, a CW current Regulator, PW voltage amplitude calculator and PW reactive power compensator;

[0130] The PW voltage controller includes a first adder and a first PI controller;

[0131] The first adder is used to convert the given value of PW voltage amplitude The current feedback value U of the PW voltage amplitude p (n) make a difference;

[0132] The first PI controller is used to calculate the current given value of the d-axis component of the CW current details as follows:

[0133]

[0134] in, is the current given value of the d-axis component of the CW current calculated for the nth time; is the given value of PW voltage amplitude; U p (n) is the current f...

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Abstract

The invention discloses an unbalanced voltage compensation device and method for a brushless doubly-fed induction generator, and belongs to the technical field of brushless doubly-fed induction generator control. The device comprises a PW voltage controller, a CW conversion angle generator, a PW voltage amplitude calculator, a PW reactive power compensator, and a CW current regulator. The PW reactive power compensator comprises a PW current converter, a multiplier, a high-pass filter and a resonance controller; the multiplier calculates a current calculation value Qp (n) of the total reactivepower of the brushless doubly-fed induction generator according to the current feedback value ipd (n) of a d-axis component of the PW current and the current feedback value upq (n) of a q-axis component of the PW voltage; and the high-pass filter acquires the current calculation value of the PW double-frequency reactive power from the Qp (n), and the resonance controller calculates the q-axis compensation amount of the CW voltage. The PW reactive power compensator outputs the q-axis compensation amount of the CW voltage to eliminate the PW double-frequency reactive power so that the frequencyand the amplitude of the PW voltage are constant.

Description

technical field [0001] The invention belongs to the technical field of brushless doubly-fed induction generator control, and more specifically relates to a device and method for unbalanced voltage compensation of a brushless doubly-fed induction generator. Background technique [0002] The brushless doubly-fed induction generator is a new type of AC induction motor, which contains two sets of stator windings with different pole pairs, called power windings and control windings, and there is no direct coupling between the stator windings; the brushless doubly-fed induction generator The rotor is specially designed so that the rotating magnetic fields with different pole pairs generated by the two sets of stator windings can interact indirectly, and the interaction can be controlled to realize energy transfer. These motors can operate in a variety of operating modes, including induction mode, cascade mode, and doubly-fed mode. [0003] The brushless doubly-fed induction gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/00H02P9/48H02P21/00
CPCH02P9/007H02P9/48H02P21/0003
Inventor 刘毅张杨生徐伟林怡凡
Owner HUAZHONG UNIV OF SCI & TECH
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