Maximum output power control method for tracking of wind power generation system

Abstract

The invention discloses a maximum output power control method for tracking of a wind power generation system. The method comprises the steps of sending a measured environmental wind speed signal to a controller through a wind speed sensor; determining a given running speed signal of a wind power generator under the current wind speed condition according to a wind speed-maximum power feature curve stored in the system; comparing the given running speed signal with the actual running speed signal of a generator; conditioning the signal through a conditioner to output a control signal; conditioning the electromagnetic torque of the generator according to the control signal and on the basis of the current voltage, current, position of magnetic pole and angle condition of the generator to enable the running speed of an AC generator to be close to the expected running speed, so as to reach the specified instruction running speed. According to the method, the wind speed sensor is used for sensing the environmental wind speed, and the running speed of the wind power generator of the wind power generation system is fast close to the maximum power point under the current wind speed condition and finally reaches the maximum power running point, so as to achieve the purpose of tracking the maximum wind energy of the wind power generation system.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a control method for tracking maximum output power of a wind power generation system. Background technique [0002] At present, in the wind power generation system, the wind energy obtained by the wind turbine is related to the ratio of the tip speed of the wind rotor to the wind speed (referred to as the tip speed ratio). If the pitch angle remains unchanged, the wind energy obtained by the wind turbine and the wind speed There is a relationship between figure 1 shown. That is to say, corresponding to each wind speed, the wind turbine can only obtain the maximum wind energy at one operating speed. Therefore, in order for the wind power generation system to obtain more wind energy, the operating speed of the wind turbine must be controlled. If the pitch angle changes, the relationship between the wind energy obtained by the wind turbine and the wind sp...

AI Technical Summary

Problems solved by technology

This method is based on the idea that there is a linear correlation between the wind turbine speed change and the generator active power, but in fact there is a nonlinear relationship between the two, and the control parameters of the control system and the sampling control cycle of the system will affect the control The convergence of the system even affects the response speed of the control system. Therefore, this control method will affect the effect of the maximum wind energy tracking control of the system

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