Adaptive density wind turbine generator unit torque and rotational speed control method

A wind turbine and rotational speed control technology, which is applied in the control of wind turbines, wind energy power generation, wind turbines, etc., can solve the problem that the set value of the torque control loop of the turbine cannot accurately respond to changes in atmospheric parameters, and achieve the maximum transformation and realization. power, the effect of improving adaptability

Active Publication Date: 2017-10-17
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a torque-rotational speed control method for adaptive air density units, which changes the torque-rotational speed operation curve from the original one to a cluster, and solves the problem that the set value of the torque control loop of the unit cannot accurately respond to atmospheric parameters The problem of change makes the unit operate on different torque-speed curves under different air densities

Method used

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  • Adaptive density wind turbine generator unit torque and rotational speed control method
  • Adaptive density wind turbine generator unit torque and rotational speed control method
  • Adaptive density wind turbine generator unit torque and rotational speed control method

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Embodiment 1

[0034] Such as figure 1 figure 2 As shown, first select the wind farm and unit for technical transformation. The wind farm should have sensors for measuring atmospheric pressure and humidity. The measurement accuracy and cycle should meet the control requirements, and the sensor can perform analog-to-digital conversion of physical quantities. The measurement device has corresponding The communication device and interface have channels for uploading variables to other platforms and conducting information interaction with other systems. The large components such as blades and gearboxes of the retrofit unit have no quality defects, each subsystem (such as wind measuring device, pitch and yaw system, etc.) is operating normally, and the communication interface of the unit's main control system is open.

[0035] Collect unit design power curve, reference torque-speed operation curve and corresponding atmospheric parameters (including: atmospheric temperature, pressure, density, humi...

Embodiment 1

[0040] The temperature difference between winter and summer in a wind farm in Ningxia is 30℃, and the typical daily density is 0.937kg / m respectively without considering the humidity. 3 And 1.04kg / m 3 , The density difference is 11%. According to the operating principle of the unit, the torque setting value should be increased by 11% proportionally, and the active power should be increased accordingly. The atmospheric parameters referenced by the original torque-speed operating curve of the unit are the atmospheric parameters of the design conditions, which are very different from the actual atmospheric parameters in winter and summer. The air density in winter is relatively high, and the unit cannot properly increase the torque setting value, resulting in capturing power There is a lot of loss; the air density in summer is too small, the unit torque setting is improper, the speed deviates from the optimal tip speed ratio, and the capture efficiency is low. In order to accuratel...

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Abstract

The invention provides a method for adjusting a wind turbine generator unit torque set value based on atmospheric density change. On the basis of analyzing the relation between the unit torque and the atmospheric density, the mapping relation between the unit torque and the atmospheric density is established; when the atmospheric density changes obviously, the torque set value is adjusted; the current situation that a standard torque and rotational speed operation curve determined at the unit design stage lacks adaptive and self-adjustment capability in atmospheric environmental change is changed. According to the method, density change is imported into the setting calculation section of the set value in the torque control link; the torque as an original uniform function of the rotational speed is turned into a function of the rotational speed and the density, so that the number of the torque and rotational speed operation curve is changed from one piece to one cluster. By means of the new method, units have good environmental adaptability. When the season and humidity change to cause change of the density, all the units can automatically adjust the torque set value. The unit operation power curve is improved. Control strategies can be realized well at the optimal tip speed ratio operation stage of the units.

Description

Technical field [0001] The invention belongs to the field of wind power generation, relates to the field of wind turbine operation control design, and specifically relates to an adaptive density wind turbine torque-speed control method. Background technique [0002] Wind power is currently a form of energy utilization with relatively mature technology, high practicality, commercial development value and strong market competitiveness. It has achieved rapid development in recent years. According to statistics from the National Energy Administration, as of the end of 2014, China's wind power has been connected to the grid. The installed capacity is close to 100 million kilowatts. With the rapid growth of scale, the industry’s attention to the operating performance of units has gradually increased. Related research has been carried out. It has been found that some units such as unit operating efficiency cannot reach the design value, and the output under the same wind speed is lower ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCF03D7/00Y02E10/72
Inventor 柴海棣范炜刘庆超张蕴
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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