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Dual-motor switching control method for wind generating set

A technology for wind turbines and wind turbines, applied in the direction of single-network parallel feed arrangement, etc., can solve the problems of wind rotor efficiency reduction, blade stall, efficiency decline, etc., to improve power generation efficiency, reliable switching control, and prolong service life Effect

Inactive Publication Date: 2012-06-27
CORONA WIND EQUIP BEIJING CO LTD
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Problems solved by technology

In the entire operating wind speed range (cut-in wind speed<wind speed<cut-out wind speed), since the speed of the airflow is constantly changing, if the speed of the wind turbine cannot be adjusted with the change of wind speed, this will inevitably make the wind rotor run at low wind speed. The efficiency is reduced (and the design efficiency is too high at low wind speed, which will cause the blade to enter the stall state prematurely)
At the same time, the generator itself also has efficiency problems at low loads. Although the generators used for wind turbines have been designed very ideally, they all have an efficiency higher than 90% when the power is greater than 30% of the rated power range. But when the power is less than 25% of the rated power, the efficiency will still drop sharply

Method used

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  • Dual-motor switching control method for wind generating set
  • Dual-motor switching control method for wind generating set
  • Dual-motor switching control method for wind generating set

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Embodiment Construction

[0027] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0028] figure 1 Shown is the structure diagram of the control system of the wind power generating set applying the present invention.

[0029]The dual-armature hybrid excitation wind turbine control system is mainly composed of a nacelle control subsystem 20 and a tower base control subsystem 21, and the communication between the nacelle control subsystem 20 and the tower base control subsystem 21 is carried out by means of PROFIBUS DP. The cabin control subsystem 20 mainly includes a cabin control unit 7, an environment sensor 8, a yaw control unit 9, a gearbox control unit 10, a hydraulic control unit 11, a brake control unit 12, a heating and cooling control unit 13, and a dual armature Hybrid excitation generator; tower base control subsystem 21 mainly includes tower base control unit 4 , power control unit 17 and converter control unit 18 . The...

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Abstract

The invention discloses a dual-motor switching control method for a wind generating set. The dual-motor switching control method comprises the following steps of: controlling a permanent magnet synchronous motor and an induction asynchronous motor by the wind generating set in a switching manner when a wind driven generator is in a ready state, a starting state, a generating operation state and a fault state.

Description

technical field [0001] The invention relates to a control method of a wind power generating set. technical background [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. Fixed-pitch wind turbines have efficiency problems when operating at low wind speeds. In the entire operating wind speed range (cut-in wind speed<wind speed<cut-out wind speed), since the speed of the airflow is constantly changing, if the speed of the wind turbine cannot be adjusted with the change of wind speed, this will inevitably make the wind rotor run at low wind speed. The efficiency is reduced (and the design efficiency is too high at low wind speed, which will cause the blade to enter the stall state prematurely). At the same time, the generator itself also has efficiency problems at low loads. Although the generators used for wind turbines have been designed very ideally, they all have an efficiency higher than 90% wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
Inventor 王洪彬谷海涛李海东赵栋利赵斌
Owner CORONA WIND EQUIP BEIJING CO LTD
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