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Control method and system for increasing generating capacity of high-capacity variable-speed wind generating set

A technology of wind power generators and control methods, which is applied in the control of wind power generators, the monitoring of wind power generators, the combination of wind power motors, etc., to achieve the effect of increasing power generation

Pending Publication Date: 2022-05-20
GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the influence of the increasing moment of inertia of wind turbines is rarely considered in the conventional maximum power tracking control of wind turbines. For low wind speed and high wind speed conditions below the rated wind speed, the same strategy is used for maximum power tracking, which is in urgent need of improvement.

Method used

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  • Control method and system for increasing generating capacity of high-capacity variable-speed wind generating set
  • Control method and system for increasing generating capacity of high-capacity variable-speed wind generating set
  • Control method and system for increasing generating capacity of high-capacity variable-speed wind generating set

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Experimental program
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Effect test

Embodiment 1

[0050] The optimal speed of the wind turbine below the rated wind speed is determined by the optimal tip speed ratio λ opt and wind speed v, as shown in formula (1):

[0051]

[0052] In the formula, ω represents the speed of the generator, G represents the transmission ratio of the gearbox, and R represents the radius of the impeller;

[0053] Based on the above formula, the control method for the large-capacity variable-speed wind turbine generator set to increase the power generation provided by this embodiment is the historical average wind speed of the previous 3 minutes As the prediction of the wind speed in the next cycle, substitute the calculated speed value into the formula (1) as the minimum limit value of the generator speed ω Min , the update formula (1) is:

[0054]

[0055] The idea of ​​the above formula is that even if the actual wind speed at the next moment is lower than the historical average wind speed in the previous 3 minutes It will also fluctu...

Embodiment 2

[0070] This embodiment discloses a control system for increasing the power generation of a large-capacity variable-speed wind power generating set, such as Figure 5 As shown, it includes a sensor wind speed information reading module, a minimum speed limit calculation module, a limit processing module and a modification module.

[0071] The sensor wind speed information reading module starts to collect wind speed historical information from the laser radar type wind sensor and the ultrasonic sensor after the wind power generating set enters the normal power generation mode, until the historical wind speed information of 3 minutes is collected; The filter filters the wind speed information.

[0072] The minimum speed limit calculation module calculates the historical average wind speed in the first 3 minutes according to the 3-minute historical wind speed information Calculate the minimum speed limit ω according to the following formula Min ;

[0073]

[0074] In the fo...

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Abstract

The invention discloses a control method and system for increasing the generating capacity of a high-capacity variable-speed wind generating set. The method comprises the steps that (1) wind speed information of a sensor is read; 2) calculating a minimum rotating speed limit value; 3) carrying out amplitude limiting processing on the minimum rotating speed limit value omega Min obtained by calculation; and 4) modifying an actual minimum rotating speed limiting parameter. According to the invention, the generating capacity can be improved without additionally arranging hardware or sensor equipment, and higher benefits can be obtained on the premise of not additionally arranging cost.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, in particular to a control method and system for increasing power generation of a large-capacity variable-speed wind power generating set. Background technique [0002] The single-unit capacity of wind turbines is developing very rapidly, especially for offshore units, the single-unit capacity has exceeded 16MW, and the increase in single-unit capacity means that the moment of inertia of the unit will also increase. When the wind turbine is below the rated wind speed, the torque control is used to adjust the generator speed to make it in the optimal tip speed ratio state, so as to obtain the best power generation. However, considering the huge inertial force of the wind rotor of the large moment of inertia wind turbine, its dynamic tracking performance must be slow, and it is difficult to take into account the speed tracking performance of the actual low wind speed and high ...

Claims

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Application Information

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IPC IPC(8): F03D7/00F03D17/00F03D9/25H02J3/46
CPCF03D7/00F03D17/00F03D9/25H02J3/466H02J2300/28Y02E10/72
Inventor 陈天宇赵晓峻李卓伟陈思范何晓聪黄阳朱阳光
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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