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A control method for triggering wind turbine pitch action command based on average value

A technology for wind turbines and action commands, applied in the control of wind turbines, wind turbines, wind energy power generation, etc., can solve the problems of shortening the service life of the pitch mechanism, increasing the number and time of maintenance, reducing fatigue loss and improving smoothness. The effect of stability, speed and power

Active Publication Date: 2017-11-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They blindly pursue the stability of the output power and ignore the loss of the pitch-changing mechanism when it operates frequently, which leads to the shortening of the service life of the pitch-changing mechanism and increases the maintenance times and time

Method used

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  • A control method for triggering wind turbine pitch action command based on average value
  • A control method for triggering wind turbine pitch action command based on average value
  • A control method for triggering wind turbine pitch action command based on average value

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] Such as figure 1 Shown is a real-time flowchart of a control method for triggering a wind turbine pitch action command based on the average value, and the specific implementation process includes:

[0041] Step 1: Obtain the wind speed v at time t t and store records.

[0042] Step 2: Calculate the wind speed variance Var(v t ), the specific formula is:

[0043]

[0044]

[0045] Step 3: According to the wind speed variance Var(v t ) to determine the duration T t , duration T t The choice of the wind speed variance Var(v t ) is directly proportional to:

[0046] T t =K×Var(v t )

[0047] Step 4: Determine the duration T t The wind conditions within, that is, to judge the wind turbine at the rated wind speed v 额定 The work in the upper and lower jitter areas is still continuously greater than the rated wind speed v 额定 working in the high wind s...

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Abstract

The invention discloses a control method for triggering a variable pitch action instruction of a wind driven generator according to a mean value. According to a variable pitch control policy for the case that the wind speed fluctuates up and down around the rated wind speed of the wind driven generator, when a variable pitch system detects that the rotating speed, the output power or the wind speed of the generator is higher than the rated value, the variable pitch system starts acting to adjust the pitch angle of a fan paddle and reduce the fan capture power so as to keep the output power of the wind driven generator stable. The past control methods only concentrate on stable control on the output power; however, due to the randomness and instability of wind, the wind speed is possible to fluctuate up and down around the rated wind speed of the wind driven generator and the rotating speed and the power of the wind driven generator also fluctuate up and down around the rated values, and consequently, the variable pitch system is leaded to frequent actions to result in fatigue loss of the variable pitch system. The invention provides a wind driven generator variable pitch control method base on a mean value algorithm, and the control method is capable of greatly improving the action smoothness of the variable pitch system, reducing the fatigue loss and improving the reliability of the system.

Description

technical field [0001] The invention relates to a control method for triggering a wind power generator pitch change action command according to an average value, which belongs to the motor control technology. Background technique [0002] In recent years, with the continuous attention of the whole society to energy and environmental issues, the development of clean and renewable energy, such as wind energy, solar energy, biomass energy, etc. has become the general trend. Among them, wind energy is an inexhaustible green energy that can be used in large quantities by human beings. The main way to utilize wind energy is wind power generation, and a wind power generation system is a device that converts wind energy into electrical energy. The output wind energy of the wind power generation system changes with the change of the external wind speed, which has a great impact on the power grid and needs to be adjusted by adding pitch control; in addition, when the wind speed is ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 樊英赵雪浩夏子朋
Owner SOUTHEAST UNIV
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