Independent variable pitch control method for floating type fan

Abstract

The invention relates to an independent variable pitch control method for a floating type fan. The independent variable pitch control method for the floating type fan comprises the steps that 1), analyzing a paddle mechanical structure of the floating fan is carried out, a paddle mechanical structure kinetic equation is obtained, 2), an independent variable pitch model is established, 3), a controller ui is designed, and 4), the floating fan is controlled by using the designed controller ui. According to the independent variable pitch control method for the floating type fan, the independent variable pitch model containing disturbance factors is established, the rate function is introduced, the designed controller can track the expected pitch angle in a self-adaptive mode, errors can be converged within limited time, the fan is usually a large-scale time-lag nonlinear system, limited time convergence can enable the fan to quickly respond under complex external conditions, so that the load of the fan is reduced, the stability of the power of the fan is maintained, and the service life of the fan is prolonged.

Description

technical field [0001] The invention relates to the technical field of floating wind power generation, in particular to a method for controlling a floating wind turbine. Background technique [0002] Compared with onshore and offshore wind turbines, floating wind turbines have a harsher operating environment. Although there are some methods of controlling floating wind turbines to suppress loads in the prior art, the implementation of the existing methods is caused by the following three problems: The effect is not ideal. The first problem is that some parameters in the floating fan model are time-varying, and the traditional control method cannot adapt to the time-varying characteristics of the parameters, so that there will be some errors after long-term operation; the second The problem is that there will be some disturbances in the floating wind turbine model, and the traditional control method cannot deal with these disturbances, resulting in a poor tracking effect. The...

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Problems solved by technology

[0002] Compared with onshore and offshore wind turbines, floating wind turbines have a harsher operating environment. Although there are some methods of controlling floating wind turbines to suppress loads in the prior art, the implementation of the existing methods is caused by the following three problems: The effect is not ideal. The first problem is that some parameters in the floating fan model are time-varying, and the traditional control method cannot adapt to the time-varying characteristics of the parameters, so that there will be some errors after long-term operation; the second The problem is that there will be some disturbances in the floating wind turbine model, and the traditional control method cannot deal with these disturbances, resulting in a poor final tracking effect. The third problem is that the convergence method of the traditional control method is not exponential, so it cannot follow the The requirements required by practical engineering to converge

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