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光伏发电系统的MPPT优化控制与仿真研究

更新时间:2020-11-01 05:38:17 大小:4M 上传用户:gsy幸运查看TA发布的资源 标签:光伏发电系统mppt 下载积分:1分 评价赚积分 (如何评价?) 收藏 评论(0) 举报

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针对光伏发电系统中发电效率低下的问题,开展光伏电池的最大功率点跟踪(MPPT)研究。首先,分析了不同光照强度和温度下光伏电池的输出特性。其次,结合升压(BOOST)电路和PWM控制,搭建了光伏发电系统的仿真模型。最后,基于近似梯度法提出了一种变步长的扰动观察算法,完成光伏电池的最大功率点跟踪控制。仿真结果表明,相较于传统的电导增量法,上述方法能够有效避免误判,快速准确地实现了光伏电池的最大功率跟踪。

In order to solve the issue of the low utilization rate in photovoltaic cells generation system,this paper focuses on the maximum power point tracking(MPPT)of photovoltaic cells.First,the output characteristics of photovoltaic cells under different light intensity and solar cell temperatures were analyzed.Secondly,the simulation model of the photovoltaic power generation system was established by combined with BOOST circuit and PWM control method.Finally,a variable step size perturbation and observation(P&O)method was proposed based on gradient optimizing ideology,which achieved the MPPT of the photovoltaic cells.Experiment results indicate that the proposed method is superior compared with the traditional incremental conductance,which can effectively avoid the misjudgment and improve the accuracy and rapidity of the MPPT in photovoltaic cells.

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