A wind power generation maximum power point tracking control method

A maximum power point, tracking control technology, applied in the control of wind turbines, wind power generation, wind turbines, etc., can solve the problems of complex control strategy, poor control accuracy, slow response speed, etc., to achieve strong adaptability and anti-interference , high precision and fast speed

Inactive Publication Date: 2018-02-13
SOUTHWEST PETROLEUM UNIV +1
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of slow response speed, poor control accuracy and complicated control strategy in the existing maximum power tracking control method of wind power generation, and provide a new maximum power point tracking control method

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  • A wind power generation maximum power point tracking control method
  • A wind power generation maximum power point tracking control method
  • A wind power generation maximum power point tracking control method

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0030] The method of the present invention can quickly track and control the wind power generator to reach the maximum power. The principle is as follows: the functional relationship between the known wind power generator output power P and the wind power generator speed ω is:

[0031]

[0032]

[0033] In the formula: γ is the tip speed ratio; ω is the speed; P is the power, ρ is the air density, C p is wind energy utilization coefficient, and V is wind speed. ρ, r, V are constants, and β is 0, so a function curve of P and ω can be obtained. Under different wind ...

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Abstract

The invention discloses a wind power generation maximum power point tracing control method. By analyzing the mathematical mechanism of a permanent magnet synchronous wind generating set, a reasonable direct-driven permanent magnet wind generating set complete model is established, a back-to-back full power converter is controlled through bivector space pulse width modulation signals, and active power output of the generator side is adjusted and the direct current voltage of the power grid side is adjusted to be constant through a double closed-loop control loop. By means of the wind power generation maximum power point tracing control method, in the environment of low wind speed which is rated wind speed, a function curve based on the relation between wind driven generator power and rotating speed is equivalent to an isosceles triangle during large-range rough adjustment, and then accurate adjustment is achieved nearby a peak value through a Gaussian function. Therefore, the searching speed and accuracy of a maximum power point can be guaranteed while the searching range is widened, and the wind energy utilization efficiency is advantageously improved.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to an automatic focusing maximum power point tracking control method. Background technique [0002] Wind power is a clean and non-polluting new energy source, and its technological innovation has become the focus of better utilization of wind energy. In the context of the rapid development of wind power in the world, using maximum power point tracking (MPPT) technology to improve the efficiency of wind energy utilization is one of the challenges faced by wind power technology. At present, most MPPT control strategies have slow response speed, poor control precision, and control efficiency needs to be improved. The MPPT control in most direct drive permanent magnet synchronous generator sets (D-PMSG) adopts tip speed ratio method, hill climbing method and power feedback method. The principle of the tip speed ratio method is simple, but it needs to measure the precise real-time wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 张安安于兵邓亚文黄维维张凡徐洋涛
Owner SOUTHWEST PETROLEUM UNIV
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