光伏发电系统并网控制策略研究

光伏发电系统并网控制策略研究(论文13000字)
摘要：随着世界各国经济繁荣、技术手段进步，能源作用越加不可忽视，要保持在当今社会可持续发展，必须巩固新能源的地位，太阳能作为一种重要的新能源，具有其独特优势，光伏发电技术也变成了近些年的热点和话题。为了满足光伏并网发电的推广要求，提升并网发电系统的转换效率和并网电流的质量性，本文把重点放在了并网发电两个关键点：最大输出位置跟踪技术和逆变器电流转换技术，然后在MATLAB/simulink中搭建模型进行仿真分析，最后择优选取变步长扰动法功率跟踪方案和SPWM逆变电流控制方案在MATLAB/simulink中搭建完整模型，验证并网策略的正确性。
关键词：光伏并网；光伏电池；最大功率点追踪；逆变器电流控制

Research on Grid-connected Control Strategy of Photovoltaic Power Generation system
Abstract:Seeing the economic prosperity and technological advancement of all countries in the world, energy plays an important role. To maintain sustainable development in today's society, we must consolidate the dominant position of energy. As an important new energy source, solar energy has its unique advantages.New energy technology has become a hot and indispensable topic in recent years. In order to meet the promotion requirements of grid-connected photovoltaic power generation and improve the conversion efficiency of grid-connected power generation system and the quality of grid-connected current, this paper focuses on two key points of grid-connected power generation: maximum output position tracking technology and inverter current conversion technology.The simulation software uses MATLAB/simulink and carries on the comparative analysis of the model construction in it. Finally, the maximum output point tracking scheme and the current conversion technology of the inverters are selected, and then the complete simulation structure of the system is built in MATLAB/simulink. The rationality and success of the grid-connected strategy design are verified according to the results.

Key words: Photovoltaic grid-connected; Photovoltaic cells; Maximum power point tracking; Inverter current control
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目 录
1.绪论    1
1.1.课题的研究背景和意义    1
1.2.研究内容国内外发展情况    1
1.2.1.光伏发电国内外发展情况    1
1.2.2.最大功率追踪技术的国内外发展状况    2
1.2.3.逆变器控制技术国内的外发展状况    2
2.光伏电池的特性分析    2
2.1.光伏电池的工作原理    2
2.2.光伏电池的输出特性    3
2.3.最大功率追踪对光伏电池的重要性    4
3.光伏MPPT控制策略    5

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3.1.扰动观察法（P&O）    6
3.2.变步长扰动观察法    8
4.光伏系统MPPT仿真分析    9
4.1.光伏系统电池模块    10
4.2.光伏并网发电系统    11
4.3.定步长扰动观察法仿真    12
4.4.变步长扰动观察法仿真    12
4.5.光伏发电系统MPPT仿真结果及对比分析    13
5.光伏系统逆变器控制策略    14
5.1.滞环PWM电流控制方式    15
5.2.SPWM电流控制方式    16
5.3.逆变器控制系统MATLAB仿真    17
5.3.1.滞环PWM控制仿真    18
5.3.2.SPWM电流控制仿真    18
5.3.3.仿真结果图示分析    19
6.光伏并网系统MATLAB仿真    22
7.总结与展望    24
参考文献    25
致谢    27