Guaranteed Performance Maximum Power Tracking Method for Wind Turbine Based on Sliding Mode Control

Abstract

The invention discloses a method for tracking maximum power of a wind turbine with guaranteed performance based on sliding mode control. Obtain the control target of the maximum power tracking of the wind turbine, and calculate the maximum power tracking error, obtain the dynamic characteristics of the maximum power tracking error, design the control signal expression according to the principle of sliding mode control, according to the principle of Lyapunov stability and the barrier Lyapu The Nove function design controls the update rate of the gains. This method avoids overestimation of the unknown dynamics of the system, so that the control gain can be maintained within a reasonable range according to the change of the unknown dynamics, reducing the vibration of the electromagnetic torque, thereby reducing the mechanical load of the transmission chain system, and prolonging the service life of the unit life, improve the steady-state performance of maximum power tracking, improve the wind energy capture efficiency of the unit, require less control parameters to be debugged, and the design and implementation process are simple. Compared with the traditional optimal torque control algorithm, it can increase the unit production capacity and increase the wind farm economic benefits.

Description

technical field [0001] The invention relates to the technical field of wind turbine control, in particular to a guaranteed maximum power tracking method for wind turbines based on sliding mode control. Background technique [0002] In recent years, the growth rate of my country's wind power installed capacity has ranked first in the world. However, due to the late start of wind power generation in my country, my country's wind power companies still rely on the development platforms and control systems of foreign wind power giants to conduct upper-level wind power technology research and development. Therefore, it is of great strategic significance to break the monopoly and develop an intelligent wind power control system with independent intellectual property rights. [0003] The maximum wind energy capture is one of the main control objectives of wind turbines, and it is an important guarantee for maximizing the economic benefits of wind farms. In order to achieve this goal...

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Problems solved by technology

[0006] In order to improve the wind energy capture efficiency of wind turbines and solve the problems of low wind capture efficiency, inability to guarantee system steady-state performance, complex design process, and many parameters to be debugged in the existing maximum wind energy capture method, the present invention provides a simple, easy-to-operate, control The maximum wind energy capture method with simple parameter debugging can realize the guaranteed performance control of the unit, thereby increasing the power generation of the unit

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