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Control method for doubly-fed wind generator converters

A technology of doubly-fed converters and wind turbines, which is applied in motor generator control, electronic commutation motor control, and generator control, etc., can solve problems such as complex control methods.

Inactive Publication Date: 2014-03-26
SHANGHAI MUNICIPAL ELECTRIC POWER CO
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a converter control method for doubly-fed wind power generators, to solve the problem that existing methods cannot realize fast and decoupled control of active power and reactive power for AC excitation generators, and the control method more complex issues

Method used

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  • Control method for doubly-fed wind generator converters
  • Control method for doubly-fed wind generator converters
  • Control method for doubly-fed wind generator converters

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] The method of the present invention controls the grid-side converter through the grid voltage-oriented vector control, and controls the rotor-side converter through the stator field-oriented vector control, including the following steps:

[0035] (1) Establish a two-phase synchronous rotating M-T coordinate system oriented according to the stator flux linkage, that is, place the d-axis in the rotating d-q coordinate system along the total stator flux linkage Ψ 1 The direction of , as the M-axis of the M-T coordinate system; the q-axis turns 90 degrees counterclockwise, that is, it is perpendicular to the total flux vector Ψ of the stator 1 , as the T axis of the M-T coordinate system;

[0036] (2) According to the mathematical model of the doubly-fed generator under the rotating d-q coordinate system of the existing AC excitation doubly-fed generator ...

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Abstract

The invention relates to a control method for doubly-fed wind generator converters. The converters are doubly-fed converters, and the converters comprise the rotor side converter connected with a generator rotor and the grid side converter connected with a power grid, the grid side converter is controlled through a voltage orientation vector of the power grid, and the rotor side converter is controlled through an orientation vector of a stator field. The problems that according to an existing method, active power and reactive power decoupling control can not be performed on an alternating-current excitation generator rapidly, and the control mode is complex are solved.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a doubly-fed wind power generator, and in particular to a converter control method for a doubly-fed wind power generator. Background technique [0002] At present, with the continuous development of the world's science and technology and economy, and the continuous improvement of people's living standards, human demand and consumption of energy are constantly increasing. The traditional way of power generation is to use those non-renewable energy sources such as oil, coal and natural gas to generate electricity through high wasteful consumption. These non-renewable resources are likely to be exhausted in the past century, and they will also pollute the atmosphere and are not conducive to society. sustainable development. As a result, countries around the world are increasingly eager for clean and renewable resources, and their development is imminent. As an inexhaustible cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00
Inventor 吴斌
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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