基于MATLAB的風(fēng)力發(fā)電系統(tǒng)最大功率跟蹤技術(shù)研究
[Abstract]:Energy is an important material basis for human survival and development. With the development and progress of human society, people's demand for energy continues to increase. Because the reserves of traditional fossil energy are decreasing day by day, especially the use of fossil energy brings Greenhouse Effect and environmental pollution to the earth, in order to develop low-carbon economy, countries all over the world develop and utilize renewable energy, Realize the energy sustainable development as the energy development strategy. Wind energy has become an important direction of renewable energy development because of its rich reserves, renewable, wide distribution and almost no pollution. Wind is a random, explosive and uncertain energy source. In order to make the wind power generator obtain the maximum power output under different wind speeds and improve the utilization rate of wind energy, the wind power generation system should work at the maximum power point at all times. Therefore, it is of great practical significance to study the maximum power point tracking technology of wind power generation. In this paper, the maximum power point tracking technology of doubly-fed asynchronous wind turbine is studied. Firstly, the basic principle and control technology of maximum power point tracking are introduced, the wind speed and wind turbine model are established, the dynamic model of wind turbine is given, and the wind speed model is simulated with Matlab program. Secondly, the space vector model of doubly-fed asynchronous generator, the power converter model of grid side and rotor side and their control methods are given, and the experimental research is carried out. Thirdly, by analyzing the power of doubly-fed induction generator, a maximum power point tracking method for variable-speed constant-frequency doubly-fed wind generator is proposed. The simulation results show that the proposed method is effective. Fourthly, a short-term forecasting method of wind turbine output power based on adaptive grey prediction method is proposed. The simulation results show that the adaptive grey forecasting method is effective. Finally, the maximum power point tracking algorithm model of wind power generation system based on adaptive grey prediction method is built, and the simulation results show that the method is effective.
【學(xué)位授予單位】:天津職業(yè)技術(shù)師范大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類(lèi)號(hào)】:TM614
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