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Wind driven generator maximum power tracking sensorless robust control method based on wind speed estimation

A technology of maximum power tracking and wind turbines, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as reducing observation accuracy

Active Publication Date: 2021-04-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

When using the arctangent method, the presence of noise and harmonics will reduce the accuracy of observations

Method used

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  • Wind driven generator maximum power tracking sensorless robust control method based on wind speed estimation
  • Wind driven generator maximum power tracking sensorless robust control method based on wind speed estimation
  • Wind driven generator maximum power tracking sensorless robust control method based on wind speed estimation

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Embodiment Construction

[0051] The present invention will be further explained below in conjunction with the accompanying drawings.

[0052] Wind turbines are mainly composed of wind rotor blades, drive trains and generators. The working status of wind turbines can be divided into four areas, such as figure 1 shown. In zone 1 and zone 4 the wind turbines are at standstill. The second stage is the maximum power tracking stage, and the maximum power tracking can be realized by controlling the speed of the wind turbine. The third stage is the constant power operation stage. Considering the mechanical conditions of the wind turbine, the constant power operation is realized by adjusting the pitch angle. The present invention mainly studies the operation of the wind generator in the maximum power tracking stage, namely figure 1 Zone 2 in .

[0053] A sensorless robust control method for wind turbine maximum power tracking based on wind speed estimation, comprising the following steps:

[0054] Step 1...

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Abstract

The invention discloses a sensorless intelligent second-order integral sliding mode control method based on wind speed estimation in order to solve a problem of maximum power tracking of a wind driven generator. The rotating speed of the wind driven generator is adjusted by controlling a permanent magnet synchronous motor, and maximum capture of wind energy is achieved. Firstly, an intelligent second-order integral sliding mode controller used for speed loop and current loop control is designed, and the controller is high in convergence speed, high in robustness and capable of effectively restraining buffeting. Secondly, a novel cascade coupling observer based on a direct sliding mode observer and an extended high-gain observer is provided for estimating the rotating speed and the position of the rotor. In addition, a combined radial basis function neural network is adopted to estimate a wind speed effective value. And finally, the effectiveness of the method under the condition of considering model uncertainty and external interference is verified through simulation.

Description

technical field [0001] The invention belongs to the technical field of robust control of wind power generators, in particular to the tracking control of maximum power of wind energy of sensorless wind power generators. Background technique [0002] With the increase of energy consumption and the deterioration of the environment, the utilization of clean and sustainable energy has been paid more and more attention. The world today is facing a huge crisis of energy shortage, environmental pollution and greenhouse gas emissions. In recent years, wind energy, as a clean and environmentally friendly renewable energy, has developed rapidly. Wind energy is random and unstable, and it is an uncontrollable energy source. In the process of wind power generation, the wind turbine is the main body of the wind energy conversion system. Wind turbine is a highly nonlinear system, and its control is getting more and more attention. Maximum power tracking and reducing mechanical load are ...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 肖玲斐马磊明陈勇兴黄欣浩孟祥硕
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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