mppt method with preset performance for wind turbine based on svr and smc

Abstract

The invention discloses an MPPT method based on SVR and SMC for a wind turbine with preset performance. Find the control target for wind turbines to achieve maximum power tracking, calculate the maximum power tracking error based on the effective wind speed estimate given by the SVR-based wind speed estimation model, and use the error conversion technology to convert the constrained maximum power tracking error into an unconstrained variable, The dynamic characteristics of unconstrained variables are obtained, and the control signal expression and control gain expression are designed according to the SMC principle. This method avoids the dependence on the unknown dynamic prior information of the system and the use of expensive lidar wind measuring devices, the implementation cost is low, and the transient and steady-state performance of the system can be guaranteed at the same time. The design process is simple and can reduce large turbulence The impact of the overshoot on the system requires less control parameters to be debugged, and the implementation process is simple. Compared with the traditional optimal torque control algorithm, it can increase the production capacity of the unit and increase the economic benefits of the wind farm.

Description

technical field [0001] The invention relates to the technical field of control of wind power generating sets, in particular to an MPPT method based on SVR and SMC for wind generating sets with preset performance. Background technique [0002] In recent years, the growth rate of my country's wind power installed capacity ranks 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 for 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] Maximum power tracking (Maximum Power Pont tracking, MPPT) is one of the main control objectives of wind turbines and an important guarantee for maximizing the economic benefits of wind farms. The princ...

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Problems solved by technology

[0006] In order to improve the wind energy capture efficiency of wind turbines and the practicability of MPPT control, solve the problems that the existing maximum wind energy capture method has low wind capture efficiency, cannot guarantee the transient and steady-state performance of the system at the same time, and has poor practicability due to the need to measure the effective wind speed. The invention provides an MPPT method based on SVR and SMC, which does not need to add additional sensors, has low implementation cost, and can ensure the transient and steady-state performance of the system at the same time without relying on the unknown dynamic prior information of the system, thereby improving the performance of the unit. power generation

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