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Method and device for controlling instantaneous power of wind power generator set

A technology for wind turbines and instantaneous power, which is applied in the control of wind turbines, wind turbines, and wind power generation, etc., and can solve the problems of power error and excessive power generation, slow response speed of DC bus, etc.

Active Publication Date: 2018-03-09
BEIJING ETECHWIN ELECTRIC
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Problems solved by technology

[0005] In view of this, the present invention provides a power control method and device for a wind power generating set, which solves the problems in the prior art that when the speed of the wind generating set rises, the response speed of the DC bus is relatively slow, resulting in power comparison errors and overshooting. Technical problems of power generation and other failures

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  • Method and device for controlling instantaneous power of wind power generator set
  • Method and device for controlling instantaneous power of wind power generator set
  • Method and device for controlling instantaneous power of wind power generator set

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0053] In practical applications, for the power generation system of direct drive wind turbines, you can refer to figure 1 As shown in the schematic diagram of the structure, the power generation system can generally include a direct-drive synchronous wind turbine ( figure 1 Only take one wind turbine M as an example), filter 11, machine-side converter 12, DC bus 13, grid-side converter 14, transformer 15, etc. In practical applications, the machine-side conve...

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Abstract

The invention provides a method and a device for controlling the instantaneous power of a wind power generator set. When it is judged that the working parameters of a grid-connected current transformer do not meet a preset condition, the grid-connected increment current set value of a grid-side converter is obtained through utilizing working parameters detected at a current moment and a previous moment. The grid-connected increment current set value of the grid-side converter and a current grid-connected output current set value are overlapped. In this way, the grid-connected output power is controlled on the grid-side converter by utilizing an obtained overlapped current set value. The response speed of the voltage of a direct-current bus is accelerated, so that the power speed of the wind power generator set fed into a power grid is increased. The rotating speed of the wind power generator set is reduced. When the working parameters of the grid-connected current transformer meet thepreset condition, a chopping booster circuit of a machine-side converter returns to the normal working mode. Therefore, the generation of faults such as power comparison errors, super power and the like is avoided.

Description

technical field [0001] This application mainly relates to the application field of wind power generators, and more specifically relates to the instantaneous power control method and device of wind power generators. Background technique [0002] With the increasingly serious problems of energy shortage and environmental deterioration, wind energy, as a green resource, has been valued by various countries, and wind power generation technology is also developing continuously. Among them, the direct-drive wind turbine has the advantages of simple structure and high reliability, and has become a research hotspot in wind power technology. [0003] In the wind power generation system of the traditional direct-drive wind power generating set, a set of dual PWM (Pulse Width Modulation, pulse width modulation) converters are usually configured for each wind power generator as the power converter. In practical applications, wind power generation The three-phase AC power generated by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38F03D7/00
CPCF03D7/00H02J3/386Y02E10/72Y02E10/76
Inventor 尹进峰杨志千郭锐
Owner BEIJING ETECHWIN ELECTRIC
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