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Conversion device and conversion method for secondary excitation wind power generation

A secondary excitation and excitation technology is applied in the field of secondary excitation wind power conversion devices, which can solve the problems that the battery operating state cannot be grasped in real time, and the normal operation of the battery cannot be guaranteed, so as to achieve the effect of safe operation and improved stability.

Inactive Publication Date: 2020-06-19
HUNAN CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the prior art are: during the operation of the existing conversion device for secondary excitation wind power generation, the operating state of the battery cannot be grasped in real time, and the normal operation of the battery cannot be guaranteed.

Method used

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  • Conversion device and conversion method for secondary excitation wind power generation
  • Conversion device and conversion method for secondary excitation wind power generation
  • Conversion device and conversion method for secondary excitation wind power generation

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Experimental program
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Effect test

Embodiment 1

[0103] The conversion method for secondary excitation wind power generation provided by the embodiment of the present invention is as follows: figure 2 As shown, as a preferred embodiment, such as image 3 As shown, providing the working magnetic field for the generator provided by the embodiment of the present invention includes the following steps:

[0104] S201, the conduction voltage starts excitation;

[0105] S202, interrupting the excitation and adding an adjustment beat after every predetermined number of excitation beats;

[0106] S203, stop and resume excitation after adjusting the tempo for a predetermined time;

[0107] S204, return to S202.

Embodiment 2

[0109] The conversion method for secondary excitation wind power generation provided by the embodiment of the present invention is as follows: figure 2 As shown, as a preferred embodiment, such as Figure 4 As shown, the battery management provided by the embodiment of the present invention includes the following steps:

[0110] S301, the battery is initialized, and the current state variable is predicted according to the state variable at the previous moment;

[0111] S302. Calculate the error covariance matrix according to the current state variable; calculate the Kalman gain matrix of the entire battery system according to the covariance;

[0112] S303, correcting the predicted state value, obtaining the corrected predicted state value, and then obtaining an error covariance matrix;

[0113] S304, obtain the state variable at the next moment through state variable prediction, and continue to speculate; evaluate the operating state of the battery according to the result o...

Embodiment 3

[0115] The conversion method for secondary excitation wind power generation provided by the embodiment of the present invention is as follows: figure 2 As shown, as a preferred embodiment, such as Figure 5 As shown, the power voltage regulation method provided by the embodiment of the present invention includes:

[0116] S401, collecting the output current signal, and using a corresponding algorithm to identify noise in the current signal;

[0117] S402, after the recognition is completed, extract the corresponding noise; perform wavelet transformation on the current noise to obtain corresponding wavelet coefficients;

[0118] S403. Perform threshold processing on the wavelet coefficients according to the obtained wavelet coefficients to obtain estimated wavelet coefficients;

[0119] S404. Reconstruct the noise-containing current according to the obtained estimated wavelet coefficients.

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Abstract

The invention belongs to the technical field of power generation devices, and discloses a conversion device and a conversion method for secondary excitation wind power generation. The conversion device for secondary excitation wind power generation is provided with a rotating speed detection module, an electric power detection module, a current frequency detection module, a central control module,an excitation module, an electric power conversion module, an electric energy collection module, a secondary excitation module, a wireless signal transmitting module, a data sharing module, an adjusting module, a battery management module and a display module. The conversion method for secondary excitation wind power generation comprises the following steps: detecting the rotating speed, the current and the voltage and the output current frequency of a fan; providing a working magnetic field for the generator; controlling electric energy output and controlling a wind driven generator to operate; managing the battery; adjusting the power voltage; and providing a rotor power supply is provided to the generator rotor through the battery. Current generated by the generator is rectified and filtered, so that the stability of the circuit is improved; and state evaluation of the battery is carried out to realize safe operation of the device.

Description

technical field [0001] The invention belongs to the technical field of power generation devices, and in particular relates to a conversion device and a conversion method for secondary excitation wind power generation. Background technique [0002] At present, the closest existing technology: With the development of clean energy, the construction of wind power generation equipment has been promoted everywhere. Wind power generation is based on wind energy, and in order to control this and maintain the output of the generator at a constant frequency, a so-called secondary excitation generator has been proposed. In this secondary excitation type wind power generator, the output power of the wind power generator can be kept at a constant frequency by controlling the electric power supplied to the generator rotor. However, during the operation of the existing converter for secondary excitation wind power generation, the operating state of the battery cannot be grasped in real ti...

Claims

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Application Information

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IPC IPC(8): H02P9/00H02P9/14G05B19/04G01R31/385G01R19/00G01R23/02H02P101/15
CPCG01R19/00G01R23/02G01R31/385G05B19/04H02P9/00H02P9/14H02P2101/15
Inventor 蔡振华李立雄杨京渝彭丽杨娴
Owner HUNAN CITY UNIV
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