Self-adaptation sliding mode control strategy for permanent magnet synchronous wind power generation system

Abstract

The invention relates to a self-adaptation sliding mode control strategy for a permanent magnet synchronous wind power generation system. The self-adaptation sliding mode control strategy is technically characterized in that mathematic models of various components of a wind power generation system power generator side are established; an interfered PMSG model with uncertain parameters is established; a Terminal sliding mode surface is constructed; a rotation speed self-adaptation Terminal sliding mode controller is constructed; and a current self-adaptation Terminal sliding mode controller is constructed. On the basis of influences from inherent nonlinearity, uncertainty, outside interference and other factors of the permanent magnet synchronous wind power system, the Terminal sliding mode control theory and the self-adaptation technology are combined, the self-adaptation Terminal sliding mode control strategy is formed, maximum power tracing for a permanent magnet synchronous draught fan is achieved, the maximum wind energy below the rated wind speed can be captured, vibration can be effectively restrained, and good self-adaptability and robustness are achieved.

Description

technical field [0001] The invention belongs to the technical field of automatic control of wind power generators, in particular to an adaptive sliding mode control strategy of a permanent magnet synchronous wind power generation system. Background technique [0002] In recent years, environmental problems have become increasingly prominent, and the development of new energy sources and the realization of sustainable development of human society have become important issues in the current world. Compared with the development process of other energy sources, wind power has unique advantages: unlike nuclear energy, which requires expensive installations and protective equipment; it is also different from water energy, which must build dams to drive water turbines. However, wind energy equipment has little impact on the local environment and ecological environment. Due to the simple structure of the direct-drive permanent magnet synchronous generator, the connection of the gea...

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Problems solved by technology

Moreover, due to the poor stability of wind energy, low energy density, random changes in wind speed and wind direction, and parameter uncertainty caused by the heat generated by the fan during operation, extremely high requirements are placed on the control of wind turbines.

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