Adaptive Observation Method for Rotor Position Angle of Doubly-fed Wind Turbine Generator

Abstract

The invention provides an adaptive observation method for the rotor position angle of a doubly-fed wind power generator, comprising the following steps: constructing a mathematical model of a doubly-fed wind power generator in a three-phase stationary coordinate system; The mathematical model of the type wind turbine in the two-phase stationary α‑β coordinate system is used to construct a reference model and an adjustable model; the reference model and the adjustable model are input into the model reference adaptive system to obtain the rotor position angle observation model; The angular observation model is used to adaptively observe the rotor position angle of the wind turbine. The invention provides an adaptive observation method for the rotor position angle of a doubly-fed wind power generator. By constructing a reference model adjustable model, the rotor position angle observation model is obtained, thereby realizing the self-adaptive observation of the wind power generator rotor position angle. This method is beneficial to the vector control of the doubly-fed wind power generation system and the realization of high-performance variable-speed and constant-frequency power generation.

Description

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

AI Technical Summary

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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