Method for tracking and controlling maximum power of wind power generation

A technology of maximum power tracking and control method, which is applied in the direction of control system, control generator, electrical components, etc., can solve the problems of complex process and low measurement progress, and achieve the effect of eliminating vibration and effective curve fitting

Inactive Publication Date: 2014-12-24
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0007] In view of the shortcomings of the existing wind power generation maximum power tracking control method mentioned in the above background technology that the measurement progress is not high and the process is complicated, the present invention proposes a wind power generation maximum power tracking control method

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  • Method for tracking and controlling maximum power of wind power generation
  • Method for tracking and controlling maximum power of wind power generation
  • Method for tracking and controlling maximum power of wind power generation

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Embodiment Construction

[0036] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0037] In order to overcome the shortcomings of the above control methods, the present invention combines gray theory with correlation analysis, prediction and decision-making technology and applies it to the maximum power point tracking control of wind energy, that is, gray correlation analysis is used to predict the maximum power point of the fan. This method does not require a mechanical sensor (wind speed sensor), and can reduce or even eliminate the vibration near the maximum power point, and track the maximum power point accurately and quickly.

[0038] The method for tracking the maximum power of wind energy based on gray relational analysis in the present invention is characterized in that the method of gray re...

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Abstract

The invention discloses a method for tracking and controlling maximum power of wind power generation in the technical field of wind power generation, comprising the steps of: firstly collecting output voltage data and corresponding output power data of a generator under various wind speeds; forming the collected voltage data into a first input reference sequence, forming the real-time output voltage data of the generator into a first comparison sequence, predicting a grey relation coefficient of the two sequences through an appointed method and obtaining a maximum output power value corresponding to the voltage at the moment; then forming the collected output power data into a second input reference sequence, forming the maximum output power value obtained in step two into a second comparison sequence and predicting a duty ratio of a BUCK converter bridge through an appointed method; and finally sending a duty ratio signal to a pulse width modulation signal generation module to maximize the output power of the generator. The method provided by the invention is easy for realization and free of strict statistic programs and intervention rules and can be conveniently realized in hardware devices.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a maximum power tracking control method of wind power generation. Background technique [0002] There are two strategies of wind energy maximum power point tracking (MPPT) control commonly used in variable speed wind power systems as follows: [0003] 1. Control method using wind speed signal [0004] This method needs to directly detect the current wind speed, and then obtain the corresponding optimal tip speed ratio through the characteristic curve to control the speed. This method not only requires a high-precision measuring instrument, but also the airflow around the wind turbine is greatly disturbed by the blades, which will cause the wind speed at each point on the fan blades to be different, making it difficult to measure accurately. [0005] 2. Control method using power signal [0006] Commonly used mountain climbing method and fuzzy control ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/04
Inventor 吴振升刘栋李婷
Owner BEIJING JIAOTONG UNIV
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