基于滑模变结构的光伏并网发电系统MPPT算法研究的中期报告.docx

基于滑模变结构的光伏并网发电系统MPPT算法研究的中期报告 摘要： 本文针对光伏并网发电系统中一种常见的问题——最大功率点跟踪（MPPT）算法进行了研究。本文利用滑模变结构控制的思路，提出了一种改进的MPPT算法，并通过仿真实验进行了验证。 本文的研究方法包括对光伏发电特性的研究、控制策略的设计、算法仿真等步骤。首先，采用MATLAB/Simulink软件建立了光伏并网发电系统的模型，并进行了光伏发电特性的分析和建模。其次，我们根据滑模控制理论的基本原理，将光伏发电特性和功率跟踪控制器结合起来，提出了改进的MPPT算法。最后，我们对改进的MPPT算法进行了仿真实验，并与传统的PO算法进行了比较。 实验结果表明，与传统的PO算法相比，改进的MPPT算法具有更快的响应速度和更稳定的输出电压和电流。同时，这种算法适用范围更广，可以应用于多种不同的光伏并网发电系统。 该研究为光伏并网发电系统中MPPT算法的优化提供了新的思路和方法，也为实际应用中的优化和改进提供了参考。 关键词：滑模变结构、光伏并网发电、最大功率点跟踪、算法优化 Abstract： This paper focuses on a common problem in photovoltaic grid-connected power generation systems - the maximum power point tracking (MPPT) algorithm. Based on the idea of sliding mode variable structure control, an improved MPPT algorithm is proposed and verified through simulation experiments. The research methods in this paper include the analysis of photovoltaic power generation characteristics, the design of control strategies, and algorithm simulation. First, the MATLAB/Simulink software is used to establish a model of the photovoltaic grid-connected power generation system, and the photovoltaic power generation characteristics are analyzed and modeled. Second, based on the basic principles of sliding mode control theory, the photovoltaic power generation characteristics and the power tracking controller are combined, and an improved MPPT algorithm is proposed. Finally, we conducted simulation experiments on the improved MPPT algorithm and compared it with the traditional PO algorithm. The experimental results show that compared with the traditional PO algorithm, the improved MPPT algorithm has faster response speed and more stable output voltage and current. At the same time, this algorithm has a wider application range and can be applied to a variety of different photovoltaic grid-connected power generation systems. This research provides new ideas and methods for the optimization of MPPT algorithms in photovoltaic grid-connected power generation systems, and provides references for optimizat