Double-fed wind power generation system side converter back-stepping variable structure control system and method

A doubly-fed wind power generation and variable structure control technology, which is applied in the direction of motor generator control, control system, vector control system, etc., can solve the problems of unsatisfactory dynamic performance and parameter stability, etc.

Pending Publication Date: 2017-10-24
BEIFANG UNIV OF NATITIES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dynamic performance and parameter stability of the system are still not ideal.

Method used

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  • Double-fed wind power generation system side converter back-stepping variable structure control system and method
  • Double-fed wind power generation system side converter back-stepping variable structure control system and method
  • Double-fed wind power generation system side converter back-stepping variable structure control system and method

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Embodiment Construction

[0112] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings, but the content of the present invention is not limited thereto.

[0113] and figure 1 The prior art is the same, and the doubly-fed wind power generation system based on the present invention includes: wind turbine, gear box, doubly-fed wind generator, machine-side converter, DC side capacitor, grid-side converter 2, transformer, machine-side Converter control system, and grid-side converter 2 control system, in which the wind turbine is connected to the double-fed wind turbine through the gearbox, the stator of the double-fed wind turbine is connected to the grid, the rotor is connected to the machine-side converter, and the machine-side transformer The DC side converter is connected to the grid-side converter 2, and the DC-side capacitor is installed between the generator-side converter and the grid-side converter 2, and the grid-side conve...

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Abstract

The invention belongs to the field of wind-driven generator control technology and relates to a double-fed wind power generation system side converter back-stepping variable structure control system. The invention discloses a double-fed wind power generation system side converter back-stepping variable structure control system and method and a double-fed wind power generation system based on the system, and the system comprises a mathematical model establishment unit (11), a current instruction value calculation unit (12), a back-stepping variable structure control unit (13) and a space vector pulse width modulation unit (14); the method is based on Liapunov stability theory, back-stepping variable structure control algorithm design is performed under a two-phase synchronous rotating reference frame wind-driven generator mathematical model, and active and reactive power decoupling control of the system is realized; in order to eliminate disturbance influence in system actual operation, a variable structure control step containing an uncertain degree PI prediction scheme is added, so that sub-systems can satisfy Lyapunov asymptotic stability conditions when suffering from the disturbance. The dynamic property of the double-fed wind power generation system is further improved, and the parameter robustness of the system is enhanced.

Description

technical field [0001] The invention belongs to the technical field of wind power generator control, and relates to a control system for a machine-side converter of a doubly-fed wind power generation system, in particular to a control system and a control method for a reverse-pushing structure control system for a machine-side converter of a doubly-fed wind power generation system. Background technique [0002] In recent years, wind power generation has received great attention as a green new energy generation method. Direct-drive permanent magnet synchronous wind turbines and doubly-fed asynchronous wind turbines are the two types of wind turbines with the most development potential and market prospects in the current wind power generation system. In order to improve power generation efficiency, both of them adopt variable speed and constant frequency power generation operation mode. Among them, the doubly-fed wind generator (DFIG) has the most applications and the most mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/24H02J3/18H02P21/14H02P101/15
CPCH02J3/386H02J3/18H02J3/24H02P21/141H02P2101/15H02J2203/20Y02E40/30Y02E10/76
Inventor 王君瑞
Owner BEIFANG UNIV OF NATITIES
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