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Wind power generator, and method for controlling same

A technology of wind power generation device and control unit, which is applied in the control of wind power generator, wind power generation, engine control, etc. It can solve the problems of unstable frequency of power system and the inability of wind power generation device to restore the frequency of power system, etc., and achieve reliable frequency Restoring, avoiding disconnection effects

Active Publication Date: 2012-11-14
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disconnection of the wind power generation device during the execution of such PFR acts on the power system as a disturbance, which may make the frequency of the power system more unstable than when PFR is not performed.
In addition, once it is disconnected, it takes time to restart, so the wind power generation device cannot achieve the purpose of restoring the frequency of the power system.

Method used

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  • Wind power generator, and method for controlling same
  • Wind power generator, and method for controlling same
  • Wind power generator, and method for controlling same

Examples

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Embodiment Construction

[0030] Hereinafter, a wind power generator and a control method thereof according to an embodiment of the present invention will be described with reference to the drawings.

[0031] figure 1 It is an external view of a wind power generator 10 according to an embodiment of the present invention. figure 1 The wind power generation device 10 shown is a so-called variable speed windmill, and has: a pillar 14 erected on a base 12; a cabin 16 arranged on the upper end of the pillar 14; Head 18.

[0032] A plurality of (in this embodiment, three as an example) blades 20 are radially attached to the rotor head 18 around the axis of rotation. The blades 20 are connected to the rotor head 18 so as to be rotatable according to operating conditions, and the pitch angle can be changed.

[0033] figure 2 It is a schematic diagram showing the overall configuration of the wind power plant 30 and the electrical configuration of the wind power generator 10 according to the present embodim...

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PUM

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Abstract

The purpose of the present invention is to reliably contribute to the frequency recovery of a power system while avoiding the power output of a wind power generator from becoming cutoff when the frequency of the power system drops. Provided is a wind power generator for calculating a limit effective power on the basis of the difference between the measured value of a shaft rotation number and a predetermined rotation number lower limit value having a predetermined margin over the disconnection rotation number and for generating an effective power command value on the basis of the aforementioned limit effective power when a predetermined frequency drop occurred which requires the recovery of the frequency drop in the power system.

Description

technical field [0001] The invention relates to a wind power generating device and a control method thereof. Background technique [0002] In recent years, wind power generators that perform system coordinated operations are required to contribute to the recovery of frequency fluctuations in the power system within a predetermined time (for example, within 30 seconds) after a disturbance occurs in the power system (Primary Frequency Response, hereinafter , referred to as "PFR".). [0003] Patent Document 1 describes that, in PFR, restrictions are placed on output effective electric power in accordance with the rotational speed or output of the rotor. [0004] [Patent Document 1] Specification of US Patent No. 7345373 [0005] PFR usually increases or decreases the effective output of the wind power generator according to the deviation (frequency variation) between the set frequency and the actual frequency (measured value), but for wind power generators that use unfixed na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/02F03D7/04
CPCH02P2009/004F05B2270/337Y02E10/723F03D7/0284H02P9/10F03D9/003H02P2101/15F03D9/255F03D9/257Y02E10/72F03D7/00H02P9/04F03D7/04
Inventor 八杉明若狭强志筱田尚信
Owner MITSUBISHI HEAVY IND LTD