Error compensation model-based wind turbine generator maximum wind energy capture control method

Abstract

The invention discloses an error compensation model-based wind turbine generator maximum wind energy capture control method, which comprises the following steps: establishing an error compensation model for measuring wind speed and rotating speed during stable operation; by detecting the wind speed in real time, acquiring speed variation at the current wind speed, and taking a value that the speed variation is superposed to the expected optimal rotating speed of a wind turbine as a wind turbine rotating speed control set value; calculating an active power instruction of a generator to control the output power of the wind turbine generator; and simultaneously, when the rotating speed of the wind turbine approaches the set value, taking the rotating speed of the wind turbine detected in real time as the wind turbine rotating speed control set value to control the generator to achieve stable operation so as to realize the maximum wind energy capture. Through the method, the wind turbine can quickly track the change of the wind speed, the computed rotating speed set value variation caused by wind speed measurement error is compensated through error compensation, and when the set value is close to stability, a power set value is computed through the actual rotating speed to ensure that the output power of the wind turbine is along the optimal power curve and to realize quick tracking of the maximum wind energy.

Description

technical field [0001] The invention is a control technology for a wind power generating set, which realizes the fast tracking of wind speed changes of the generating set and ensures maximum wind energy capture, and relates to the fields of automatic control technology and new energy power generation technology. Background technique [0002] With the wide application and increasing capacity of wind power generation, variable-speed wind turbines have become the mainstream models of large-scale grid-connected wind turbines. Wind power is a random, explosive, and unstable energy source. The wind turbine used for wind energy capture has an optimal operating speed at the rated wind speed. The stress of the wind turbine is the smallest, so the variable speed operation of the wind turbine requires that the wind turbine speed can be adjusted in real time according to the change of the wind speed when the wind speed is low, so that it can always run at the optimal speed and maintain ...

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The purpose of this invention is to solve the problem of wind turbine speed control below the rated wind speed. Aiming at the inaccurate wind speed measurement and the hysteresis based on the actual speed measurement control, a wind turbine maximum wind energy capture control method based on an error compensation model is proposed. Wind speed calculates the speed given value, and makes up for the problem of inaccurate wind speed measurement by establishing an error compensation model between wind speed and speed deviation. Fixed value, control the generator to achieve stable operation, so as to achieve the speed and accuracy of maximum wind energy capture

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