Wind turbine generator guaranteed performance control method based on UDE

Abstract

The invention discloses a wind turbine generator guaranteed performance control method based on a UDE principle. A control target of a wind turbine generator to achieve maximum power tracking is obtained, a maximum power tracking error is calculated, upper and lower bounds of the maximum power tracking error are designed, the constrained maximum power tracking error is converted into an unconstrained variable, the dynamic characteristics of the unconstrained variable are obtained, an ideal control signal expression is designed, the UDE principle is used for estimating an unknown function in anideal control signal, and a final control signal expression is obtained. According to the method, the system overshoot and tracking errors can be reduced, meanwhile the transient and steady-state properties of a system are ensured, the design process is simple, the impact of the overshoot caused by large turbulence on the system can be reduced, thus the service life of a unit is prolonged, the failure rate is decreased, control parameters needing to be debugged are few, the implementation process is simple, the practicability is good, compared with a traditional optimal torque control algorithm, the capacity of the unit can be improved, and economic benefits of a wind power plant are increased.

Description

technical field [0001] The invention relates to the technical field of control of wind power generators, in particular to a UDE-based guaranteed performance control method for wind power generators. Background technique [0002] Control technology is the core technology of wind power generation system. Due to the late start of wind power generation in my country, although the growth rate of my country's wind power installed capacity has ranked first in the world in recent years, at present, my country's wind power companies still rely on the development platforms and control systems of foreign wind power giants. Conduct upper-level wind power technology research and development. From the "Sino-US trade war" incident, it can be seen that the development of an intelligent wind power control system with independent intellectual property rights has important strategic significance. [0003] Maximum wind energy capture is one of the main control objectives of wind turbines and an...

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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 that the existing maximum wind energy capture method has low wind capture efficiency, cannot guarantee system transient and steady-state performance at the same time, the design process is complicated, and there are many parameters to be debugged, the present invention provides a simple The maximum wind energy capture method that is easy to implement and control parameters are simple to debug can ensure the transient and steady-state performance of the system at the same time, thereby increasing the power generation of the unit

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