Energy feedback management system of fan variable pitch system and control method

A technology of energy feedback and management system, which is applied in the direction of electric vehicles, electrical components, transportation and packaging, etc., can solve problems such as waste, can only be converted into heat energy consumption, and feedback energy cannot be effectively used, so as to suppress voltage rise and avoid The effect of wasting energy

Active Publication Date: 2020-05-29
XUCHANG XUJI WIND POWER TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an energy feedback management system and an energy feedback control method for a wind turbine variable pitch system, which can not only suppress the increase of the DC bus voltage The purpose, and further avoid the waste of energy, save electricity and energy

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  • Energy feedback management system of fan variable pitch system and control method
  • Energy feedback management system of fan variable pitch system and control method
  • Energy feedback management system of fan variable pitch system and control method

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Embodiment Construction

[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0048] The first aspect of the present invention provides an energy feedback management system for wind turbine pitch control system, such as figure 2As shown, the energy feedback management system includes a DC bus voltage acquisition circuit, a DC bus voltage judgment processing module, a supercapacitor charging circuit and a lubrication unit power supply circuit; the DC bus voltage acquisition circuit, the supercapaci...

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Abstract

The invention discloses an energy feedback management system of a fan variable pitch system and a control method. The system comprises a direct current bus voltage obtaining circuit, a direct currentbus voltage judging and processing module, a super capacitor charging circuit and a lubricating unit power supply circuit. A direct-current bus voltage is compared with a preset voltage, the supercapacitor charging circuit and / or the lubricating unit power supply circuit are selected to be started or stopped according to a comparison result, and a supercapacitor module is adopted for charging and / or a lubricating unit is adopted for supplying power to finish braking energy recovery. In the invention, when a variable-pitch motor is braked, generated motor braking energy is stored in the super capacitor module (a variable pitch system backup power supply) or the lubricating unit is started so that energy feedback generated when the motor generates power can be effectively controlled, a purpose of inhibiting avoltage rise of a direct-current bus is achieved, energy waste is further avoided, and electricity and energy are saved.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to an energy feedback management system and a control method of a wind turbine variable pitch system. Background technique [0002] The variable pitch system of the wind turbine is mainly used to adjust the pitch angle of the blades. The control of the pitch angle of the fan blades is usually realized by an AC servo drive system. The AC servo drive system is mainly composed of an AC servo motor and an AC servo driver. The AC servo The motor generally adopts a permanent magnet synchronous motor. When the synchronous motor brakes, the motor is in the state of generating electricity. This means that energy will be returned to the DC bus of the servo drive. Because the DC bus contains filter capacitors, the DC bus voltage will rise. How much the voltage increases depends on the kinetic energy of the motor when braking starts and the capacity of the capacitors on the DC bus. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/14H02J7/34
CPCH02J7/1438H02J7/345
Inventor 刘德林代兴华赵瑞杰王海明王旭昊
Owner XUCHANG XUJI WIND POWER TECH
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