Control method of wind power generation system based on markov jump law

Abstract

The invention discloses a control method based on the Markov jump rule for a wind power generation system. The control method is characterized in that wind speed acting on a wind power generator is filtered, and low-frequency wind speed is extracted; the whole wind speed domain is divided into a plurality states according to a set interval; a Markov model is built for the filtered low-frequency wind speed; and order expanding is performed on a state space model of the wind power generation system, and the original wind power generation system is described as a Markov jump system including a wind speed Markov augmented model. The control method has the superior effects that the random fluctuation rule of wind speed is introduced into the model of the wind power generation system, accurate modeling and effective control of a blower are realized to improve the operating point switching control effect of the blower, meanwhile, the fluctuation frequency of output power is effectively reduced, and in comparison with a traditional current controller, higher stability is achieved.

Description

technical field [0001] The invention relates to a method for controlling a wind power generation system based on the Markov jump law, and belongs to the technical field of wind power generation. Background technique [0002] Wind energy is an important renewable energy source. The effective use of wind energy is an important part of solving energy problems and environmental protection issues. As an important system that absorbs wind energy and converts it into electrical energy, the wind power generation system must be stable in operation and the quality of output power It has a crucial impact on the stability of the grid. The control strategy of the wind power generation system is to extract energy from the natural wind as much as possible below the rated wind speed, and to stabilize the power output at the rated power point above the rated wind speed. Due to the randomness of wind speed, its random fluctuations often lead to fluctuations in the operating point of the wind...

AI Technical Summary

Problems solved by technology

[0007] To sum up, the existing wind power system controller design only considers the internal state of the wind turbine, and does not deal with the randomness of wind speed. As the energy source and core part of the entire wind power system, the randomness of wind speed Fluctuation has a very important impact on the stable and safe operation of wind power generation systems and smooth power output

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