獨立光伏發(fā)電系統(tǒng)的MPPT控制及能量管理的研究
[Abstract]:Nowadays, with the increasingly serious problems of fossil energy shortage and environmental pollution, solar energy, with its unique advantages, has been rapidly developed and applied, and photovoltaic power generation is the main application direction of solar energy. How to obtain solar energy efficiently has been the main research problem of photovoltaic power generation, and the cycle life of battery, as the energy storage equipment of independent photovoltaic power generation system, has a serious impact on the stability of the system. So the management of battery energy is also extremely important. Based on this, this paper studies the maximum power point tracing technology and battery energy management in independent photovoltaic power generation system. The main research contents are as follows: first, consult the domestic and foreign literature related to photovoltaic power generation. Understanding the background of photovoltaic power generation, analyzing the research status of maximum power point tracking technology and battery energy management at home and abroad, and expounding the main types of photovoltaic power generation system. Secondly, the principle of solar cell generation is expounded, and the mathematical model of solar cell is analyzed in detail, including theoretical mathematical model and engineering mathematical model. According to the engineering model of solar cell, the simulation model is carried out in MATLAB/Simulink. Study the output characteristics of solar cells in different environments. Thirdly, the working principle, the main characteristic parameters and the factors influencing the life of the battery are analyzed, and several methods for predicting the residual capacity of the battery are analyzed, and the prediction method of the residual capacity of the battery is introduced in this paper. How to control the charge and discharge of the battery according to the residual capacity of the battery is described in detail. Fourthly, the principle of maximum power point tracking technology is analyzed, and the advantages and disadvantages of several commonly used maximum power point tracking techniques are compared. The adaptive disturbance observation method based on Kalman filter is introduced in detail in this paper. The control strategy is simulated and analyzed. Fifthly, based on DSP28027 chip, an experimental platform for independent photovoltaic power generation system is built. Based on the platform, the residual capacity prediction strategy and the maximum power point tracking control strategy are analyzed and verified. Experimental results show the effectiveness of the control strategy.
【學位授予單位】:安徽大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TM615
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