基于Matlab的光伏阵列输出特性和最大功率点跟踪控制策略的研究

Research on Photovoltaic Array's Output Characteristics and Maximum Power Point Tracking Control Strategy Based on Matlab

针对光伏并网发电过程中存在的最大功率输出问题,研究了光伏阵列高度的非线性输出特性和最大功率点跟踪(MPPT)问题。根据光伏阵列的等效数学模型,结合Matlab分析环境中的Simulink工具,基于S函数建立光伏阵列的输出特性分析模型。通过对不同温度和光照强度条件下进行模型仿真分析,研究环境温度和光照强度对光伏阵列输出特性的影响。采用S函数对最大功率点进行建模,给出MPPT的控制策略。重点研究了扰动观察法和电导增量法最大功率跟踪特性,并对仿真结果进行对比分析。研究结果对并网控制器的研究和实践具有一定的理论指导和参考价值。

In view of the maximum power output problem which existed in the photovohaic grid-connected generation, this paper researched on photovohaic cells＇ highly nonlinear output characteristics and maximum power point tracing （MPPT） problem, According to the equivalent mathematical model of the photovoltaic array, the photovoltaic array output characteristic analysis model was built by using Matlab environment and analysis of Simulink tool box based on S function, and then setting conditions model policy were analyzed in different temperature and light intensity, the influence of environmental temperature and light intensity on photovoltaic array output characteristics was researched. MPPT control strategies were provided by using the S function. The disturbance of observation and conductivity incremental approach were focused to research the maximum power tracking characteristics, and the simulation results were compared and analyzed. The results show that the study and practice of the grid-connected controller have certain theoretical guidance and reference value.