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Maximum power tracking device and control method for small permanent magnet direct drive wind power generation system

A wind power generation system and maximum power tracking technology, applied in the control of wind turbines, wind energy power generation, wind turbines, etc., can solve the problems of misjudgment, tracking accuracy and speed influence, power loss and so on

Inactive Publication Date: 2015-09-02
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has two disadvantages: one is that it is difficult to achieve accurate measurement of wind speed
The realization of P&O is relatively easy, but the found operating point can only oscillate near the MPP, resulting in the loss of part of the power
In addition, the initial value and the disturbance step size have a great influence on the tracking accuracy and speed, and sometimes misjudgment occurs

Method used

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  • Maximum power tracking device and control method for small permanent magnet direct drive wind power generation system
  • Maximum power tracking device and control method for small permanent magnet direct drive wind power generation system
  • Maximum power tracking device and control method for small permanent magnet direct drive wind power generation system

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Embodiment Construction

[0068] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0069] figure 1 It is a hardware structure diagram of the embodiment of the present invention, wherein the main parameters of the small permanent magnet direct drive wind power generator 2 are: the diameter of the wind wheel is 1.2m, the rated power is 300W, the rated voltage is 24V, the rated speed is 800r / min, and the starting wind speed 1m / s, rated wind speed 10m / s, safe wind speed 25m / s; the main parameters of the maximum power tracking device are: MPPT controller adopts dsPIC33FJ06GS101 microcontroller, DC-DC converter adopts Boost circuit, drive module adopts MCP14E3, voltage sensor adopts LV28-P, current sensor 8 uses LA25-NP, wind speed sensor 1 uses JL-FS2, a total of 5 pieces: respectively installed on the f...

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Abstract

The invention discloses a maximum power tracking device for a mini permanent magnetic direct drive wind power generation system and a control method in the technical field of wind power generation, wherein the maximum power tracking device comprises a fan, an MPPT (maximum power point tracking) controller, a rectifier, n air velocity transducers, a revolution speed transducer, a voltage transducer, a current transducer, a DC-DC (direct current to direct current) converter, a driver module, a first capacitor, a second capacitor and a load; the control method comprises the following steps of acquiring air velocity vectors by utilizing the air velocity transducers arranged at different positions, collecting a large number of air velocity vector-optimal revolution speed practical samples, establishing an air velocity-optimal revolution speed prediction model by utilizing a support vector machine, and carrying out the maximum power tracking by combining the prediction model with a small-step perturbation and observation method. The maximum power tracking device for the mini permanent magnetic direct drive wind power generation system and the control method, disclosed by the invention, have the advantages that the tracking speed is increased, and the power loss of a perturbation process is effectively reduced; after the characteristics of a fan changes, the prediction precision is ensured by repeatedly collecting samples and training a new prediction model.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a maximum power tracking device and a control method of a small permanent magnet direct drive wind power generation system. Background technique [0002] With the increasingly tense energy situation, distributed power generation and energy-saving technologies represented by small-scale wind power generation have attracted more and more attention and become a current research hotspot. [0003] Wind energy is a kind of energy with great randomness. To ensure the maximum capture of wind energy, the variable speed wind power generation system generally adopts the control strategy of maximum power point tracking (MPPT). For small permanent magnet direct drive wind power generation systems, commonly used MPPT methods include optimal speed setting, disturbance observation and other methods. [0004] The principle of the optimal speed setting method is: under a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 刘卫亮马良玉刘长良林永君马进
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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