太阳能电池在变化光谱下的产能预测
毕业论文关键词 太阳能电池 Simulink 输出功率 可变参数 VB Title Solar cell production capacity forecast under changing spectrum
Abstract This design mainly establishes a solar tracking algorithms and a model which can compute PV array output capacity to study the capacity differences of PV systems under different latitudes.Research methods include the use of Visual Basic to calculate the the solar radiation at different latitudes and at different times , and building of the capacity calculation model of solar cell module group using Simulink in which solar radiation at different latitudes is used as variable input parameters to investigate the production capacity.The number of batteries in series and in parallel, load characteristics, their specific parameters are used as input parameters too to study the difference of production capacity while the composition of materials changes.The main research objective of the design is to develop a method which can accurately predict the capacity calculation of photovoltaic systems and can be applied to different models of photovoltaic cells, different system installation latitudes and PV system capacity forecasts of different arrangements.The model can also guide the optimization of photovoltaic systems design and the choosing of materials.With this graduation study a result was found that except in summer, Nanjing (lower latitude) capacity is generally higher than Beijing (higher latitude), so although economy is higher when PV systems are installed at lower latitudes, PV power plants at high latitudes in the summer also have very good economic benefits.Further,when temperature changes 1 degree, the power at maximum power point varies between 0.08W and 0.53W,when the light intensity changes 1W/m2, the power at maximum power point changes by approximately 3.2W,the impact of the change of light intensity is more significant for the power at maximum power point, effects of changes in light intensity is 10 times higher than the effect of temperature changes.
Keywords Solar cells Simulink Output power Variable parameters Visual Basic
1引言6
1.1世界范围内的能源与环境问题6
1.2太阳能的开发与利用7
1.3光伏发电7
1.4本文的主要工作9
2本文所需要的理论知识9
2.1二极管简介9
2.2光伏系统简介12
2.3MatlabSimulink简介14
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