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Adaptive measurement method of rotor position angle of doubly fed wind generator

A technology of wind generator and rotor position angle, which is applied in the direction of generator circuit layout control, generator control, motor generator control, etc. It can solve the problems of unfavorable double-fed wind power generation system vector control, etc., and achieve high-performance variable speed The effect of constant frequency power generation

Active Publication Date: 2018-12-18
GUANGDONG UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0004] The present invention provides a self-adaptive observation of the rotor position angle of a doubly-fed wind power generator in order to overcome the technical defects that the existing motor rotor observation method is not conducive to the vector control of the doubly-fed wind power generation system and the realization of high-performance variable-speed constant-frequency power generation method

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  • Adaptive measurement method of rotor position angle of doubly fed wind generator
  • Adaptive measurement method of rotor position angle of doubly fed wind generator
  • Adaptive measurement method of rotor position angle of doubly fed wind generator

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Embodiment 1

[0114] Method of the present invention is carried out simulation modeling research on Matlab / Simulink platform, given rotating speed n=750rpm, obtain as Figure 3 to Figure 6 The simulated waveform is shown.

[0115] In the specific implementation process, combined with Figure 3 to Figure 6 The simulation waveform can be obtained as Figure 7 The waveform of the comparison between the actual value of the rotor position angle and the observed value is shown. It can be seen from the figure that there is a certain error in the observed value of the rotor position angle when the motor starts. good.

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Abstract

The invention provides an adaptive observation method of a rotor position angle of a doubly-fed wind generator, comprising the following steps: constructing a mathematical model of the doubly-fed windgenerator in a three-phase static coordinate system; According to the coordinate transformation method, the dynamic characteristics of a doubly-fed wind turbine at two-phase stationary alpha-beta coordinate system, constructing reference model and adjustable model; The reference model and the adjustable model are input into the model reference adaptive system, and the rotor position angle observation model is obtained. The adaptive measurement of rotor position angle of wind turbine is carried out by using the rotor position angle observation model. The invention provides an adaptive observation method for rotor position angle of a doubly-fed wind generator, By constructing a reference model adjustable model, the rotor position angle observation model is obtained, thus realizing the adaptive observation of the rotor position angle of the wind turbine. This method is conducive to vector control of doubly-fed wind power generation system and the realization of high-performance variable-speed constant-frequency power generation.

Description

technical field [0001] The invention relates to the technical field of model reference adaptive control, and more specifically, relates to an adaptive observation method for the rotor position angle of a doubly-fed wind power generator. Background technique [0002] As a renewable and clean energy source, wind power generation technology is currently a research hotspot for scholars at home and abroad. Accurate detection and reliable calculation of the rotor position angle of the generator is the key to the vector control of the doubly-fed wind power generation system and the realization of high-performance variable-speed constant-frequency power generation. [0003] The model reference adaptive control theory was first proposed by S.Tamai in the 1980s and applied to the AC drive system. The deviation value between them is taken as the control object, and adjusted by the adaptive regulator to make the deviation value tend to zero. Afterwards, C. Schauder introduced this meth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13H02P21/18H02P9/00H02P101/15
CPCH02P9/007H02P9/009H02P21/0017H02P21/13H02P21/18H02P2101/15
Inventor 吴丹琦杨俊华邹子君
Owner GUANGDONG UNIV OF TECH