Maximum wind energy capture control method through inertia of large-scale wind turbine

Abstract

The invention discloses a maximum wind energy capture control method through the inertia of a large-scale wind turbine. As for the maximum wind energy capture control method, according to the respective characteristics of an optimal torque method and a sliding mode control method, a switching control method is designed on the premise that the foreknown wind speed is known, the rapidity of advancedcontrol methods such as sliding mode control is used in the process of wind speed increasing, and in the process of wind speed decreasing, the optimal torque method is adopted to take advantage of the characteristic of slow changing of the optimal torque method. The switching control method has the advantages that the characteristics of different control means are fully used, and secondly, kinetic energy of the wind turbine due to the inertia is fully used for improving the target power controlled in the maximum wind energy capture stage within the wind speed decreasing range. According to the embodiment of the maximum wind energy capture control method through the inertia of the large-scale wind turbine, the switching control method is compared with the classical optimal torque method and sliding mode control, and the effectiveness of the switching control method is verified.

Description

technical field [0001] The invention belongs to the field of wind turbine control, in particular to a maximum wind energy capture control method utilizing the inertia of a large wind turbine. Background technique [0002] In the maximum wind energy capture control stage below the rated wind speed, the main goal of the control is to extract as much energy as possible from the wind energy. Most articles adopt the maximum power point tracking (MPPT) control strategy, which control strategy It is to adopt different control methods to make the rotor speed of the wind turbine approach to the optimal rotor speed. The classic control method is the optimal torque method. In addition, advanced control methods are also widely studied and applied to the maximum wind energy capture control stage of wind turbines, such as sliding mode control and predictive control. [0003] Different control methods have their own characteristics, but if the control strategy is only based on the maximum...

AI Technical Summary

Problems solved by technology

This leads to a serious problem, blindly tracking the reference optimal power value ignores the kinetic energy due to inertia

However, due to the large moment of inertia of large wind turbines, the kinetic energy due to inertia is a non-negligible part. How to use this kinetic energy is not mentioned in most articles, which leads to the inevitable loss of energy extracted from wind energy.

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