A Method for Controlling the Output Power of the Rotor Side of a Doubly-fed Fan

A doubly-fed fan and output power technology, which is applied in the direction of generator control circuit, control system, control generator, etc., can solve the problems that are difficult to realize, and achieve the effect of ensuring stable output, eliminating sudden changes, and fast power

Active Publication Date: 2018-03-13
WUHAN UNIV
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  • Description
  • Claims
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Problems solved by technology

It turns out that this assumption is difficult to realize in practice

Method used

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  • A Method for Controlling the Output Power of the Rotor Side of a Doubly-fed Fan
  • A Method for Controlling the Output Power of the Rotor Side of a Doubly-fed Fan
  • A Method for Controlling the Output Power of the Rotor Side of a Doubly-fed Fan

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Embodiment

[0020] as attached figure 1 as shown, figure 1 An overall diagram of the object and the improved rotor-side controller model for a DFIG.

[0021] In the object model, the input is the d and q axis components of the rotor voltage, and the output is the active and reactive components output by the fan; in the control model, the input is the active and reactive components output by the object model, and the output is Control system rotor voltage control reference. The relationship between the rotor voltage control reference value and the actual input of the rotor voltage of the object model

[0022] The specific control is as follows: 1. The outer loop adopts active and reactive power decoupling control, and the inner loop adopts direct current control. 2. In the outer loop control, the actual value of active and reactive power output in the object model is compared with the reference value, and the difference is controlled by PI to obtain the d and q components of the rotor...

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Abstract

The invention relates to a method for controlling the output power of the rotor side of a double-fed draught fan. Feedforward control is introduced, so that the influence of bus voltage fluctuation is eliminated, it is guaranteed that the power of an object model is stably output under the condition of bus voltage fluctuation, after improved control is applied, the capacitor capacity can be reduced, and engineering cost is reduced. A rotor side improved control strategy is high in control accuracy and high in response speed, the power fluctuation can be reduced during direct voltage fluctuation, and output is more stable.

Description

technical field [0001] The invention relates to a method for controlling the output power of a fan, which belongs to the field of electric equipment, and in particular to a method for controlling the output power of the rotor side of a double-fed fan. Background technique [0002] Compared with traditional fixed-pitch and fixed-speed wind turbines and current full-power conversion direct-drive wind turbines, variable-speed constant-frequency wind turbines based on induction doubly-fed generators (double fed induction generator, DFIG) have With the advantages of better power quality, smaller frequency converter and maintenance cost, flexible active and reactive power decoupling and wider applicability, it has become the main model used by large wind farms at present. [0003] The control objective of the DFIG rotor side is to achieve power decoupling and stable output, and the stability of its object model depends on the stability of the DC bus voltage. In the traditional ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/10H02P101/15
CPCH02P9/007H02P9/105
Inventor 刘开培葛思扬郑景文黎玉江
Owner WUHAN UNIV
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