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

A technology of wind power generation system and maximum power tracking, which is applied in the control of wind turbines, wind power generation, wind turbines, etc. It can solve the problems of poor tracking accuracy, high cost, and errors, so as to improve speed and accuracy and save control costs , Improve the effect of tracking speed

Inactive Publication Date: 2015-03-25
ZHONGKE INNOVATION BEIJING TECH +1
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Problems solved by technology

However, due to sample limitations and the influence of over-learning or under-learning in the training process, there is inevitably a certain error between the predicted value of the maximum power point of the model and the actual value.
[0007] In summary, the existing control methods for wind power generation systems have disadvantages such as high cost and poor tracking accuracy, which limit the development of wind power generation, so it is necessary to improve them

Method used

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

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Embodiment Construction

[0045] 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.

[0046] 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 The wind speed is 1m / s, the rated wind speed is 10m / s, and the safe wind speed is 25m / s; the main parameters of the maximum power tracking device are: MPPT controller adopts dsPIC33FJ06GS101 single-chip microcomputer, DC-DC converter adopts Boost circuit, drive module adopts MCP14E3, voltage sensor 5 Choose LV28-P, choose LA25-NP for current sensor 8, use voltage zero-crossing detection type ...

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Abstract

The invention relates to a maximum power tracking control method for a small permanent-magnet direct-drive wind power generation system. According to the method, on the basis of collecting a lot of actual samples of wind speed vector-rotating speed-power, a firefly support vector machine regression prediction model of the wind speed is established, and wind speed estimation is performed by utilizing the model; next, the optimal rotating speed, corresponding to the maximum power point, of a draught fan is predicted through the optimum tip speed ratio method; afterwards, the rotating speed of the draught fan is adjusted to the predicted optimum rotating speed of the draught fan, and the maximum power of the draught fan is tracked based on the perturbation and observation method at a set perturbation step length with the rotating speed as an initial value. According to the maximum power tracking control method, wind speed estimation without sensors is achieved, the control cost of a power generation system is greatly reduced, the speed and accuracy for looking for the maximum power point are enhanced, and power loss during perturbation is lowered.

Description

technical field [0001] The invention relates to a method for controlling a small permanent magnet direct drive wind power generation system, which belongs to the technical field of power generation. Background technique [0002] With the continuous aggravation of the global energy crisis, people pay more and more attention to renewable energy. Due to its many advantages, wind power has become one of the main directions of new energy power generation. Small wind power generation systems (less than 15kW) are very competitive in remote mountainous areas and islands where large power grids cannot provide power support due to their low cost. Therefore, it is of great practical significance to carry out relevant research on small wind power generation systems. [0003] The output power of the wind turbine is related to the external environment and load conditions, and there is a unique maximum power point (MPP) under certain external environment and load conditions. In order to...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCF03D7/00Y02E10/72
Inventor 马良玉宋胜男陈文颖刘卫亮林永君刘长良马进马永光
Owner ZHONGKE INNOVATION BEIJING TECH
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