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Integrated method of vector and direct torque control for doubly-fed wind turbines

A doubly-fed wind power generation, direct torque control technology, applied in motor generator control, vector control system, AC motor control, etc.

Active Publication Date: 2011-12-28
山西合创电力科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned technical difficulties existing in the control method of the existing wind power generator, and provide a kind of vector control and direct torque control comprehensive method of doubly-fed wind power generator combining vector control and direct torque control

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  • Integrated method of vector and direct torque control for doubly-fed wind turbines
  • Integrated method of vector and direct torque control for doubly-fed wind turbines
  • Integrated method of vector and direct torque control for doubly-fed wind turbines

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the examples.

[0042] The doubly-fed wind generator vector and direct torque control comprehensive method in the present embodiment, it comprises the following steps:

[0043] a) Establish the traditional vector control mathematical model of the doubly-fed wind turbine in a stable operating state, collect the three-phase a, b, c AC current and voltage of the doubly-fed wind turbine in real time, and convert the current and voltage into control according to the vector control mathematical model The d-axis current and voltage component of the synthetic rotating magnetic flux of the doubly-fed wind turbine stator and the q-axis component that controls the electromagnetic torque of the doubly-fed wind turbine; through the control of the d and q-axis component voltage and current through pulse width modulation (PWM), Adjust the grid of the corresponding insulated gate bipolar transistor (IGB...

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Abstract

The invention relates to a comprehensive method for vector or direct torque control of a doubly-fed wind generator and belongs to a comprehensive method which uses the vector control when the doubly-fed wind generator is in a stable operation state and uses the direct torque control when the doubly-fed wind generator is in a wind power generating transient state. The comprehensive method mainly solves the technical problems existing in the prior wind generator control method that the transient swing is hard to control due to the sudden change of wind force. The technical proposal comprises the following steps: a) establishing a conventional vector control mathematical model of the doubly-fed wind generator in the stable operation state, due to the control of component voltage and current on the d and q axes by pulse width modulation(PWM), controlling the AC exciting current frequency of the wind generator by a grid electrode of a bipolar triode switch of a corresponding isolated gate in an adjusting converter, and realizing the super-synchronous and sub-synchronous variable speed constant frequency power generation of the wind generator; and b) in the wind power generating transient process, using the doubly-fed wind generator controlled by the method of the direct torque control of the wind generator.

Description

technical field [0001] The invention relates to a vector and direct torque control comprehensive method of a doubly-fed wind power generator, which belongs to a doubly-fed wind power generator that uses vector control in a stable operating state and uses direct torque control in the transient process of wind power generation comprehensive approach. Background technique [0002] As we all know, wind power is the cheapest, most promising and inexhaustible green energy among renewable energy sources. At present, variable-speed constant-frequency double-fed wind turbines are regarded as a mainstream type of wind turbines at home and abroad. When the generator set is in steady state operation, the traditional vector control method has an ideal control ability for the doubly-fed wind turbine, but when the wind changes suddenly, because this traditional control method needs to perform real-time control of AC a, b , c system to the relatively static DC d, q system for cumbersome c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P21/14H02P27/04
Inventor 郑德化赵春生范莉平张晓巍李刚菊杨文元王世杰郭史鹏
Owner 山西合创电力科技有限公司
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