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首页> 外文期刊>Journal of power electronics >Averaged current mode control for maximum power point tracking in high-gain photovoltaic applications
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Averaged current mode control for maximum power point tracking in high-gain photovoltaic applications

机译：在高增益光伏应用中的最大功率点跟踪的平均电流模式控制

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摘要

Efficient extraction of the maximum power from photovoltaic (PV) systems under inherently variable weather conditions is a key issue that has been tackled in recent years. Maximum power extraction techniques are relevant for increasing the penetration of PV systems into electric systems. This paper presents an averaged current mode control strategy as a maximum power extraction technique in a photovoltaic high step-up dc-dc converter, which can be applied to dc microgrids or ac networks through power inverters. Since the generated power of a photovoltaic system is related to the terminal voltage, power extraction is given through the regulation of the converter's input voltage. For this purpose, in the proposed averaged current mode control, the inner current loop uses the inductor current as a feedback signal, which improves the dynamic behavior of the converter with a simple gain. Meanwhile, the outer voltage loop is built with a proportional-integrative controller for regulation. The converter and control strategy are able to track rapid irradiance changes. They are also able to maintain the photovoltaic voltage regulation under dc bus voltage variations. The performance of the proposed control scheme is validated experimentally with a 100 W converter prototype.
机译：在固有的可变天气条件下有效地提取来自光伏（PV）系统的最大功率是近年来解决的关键问题。最大功率提取技术与增加光伏系统的渗透到电气系统相关。本文呈现平均电流模式控制策略作为光伏高升压DC-DC转换器中的最大功率提取技术，可通过功率逆变器应用于DC微电网或交流网络。由于光伏系统的产生功率与端电压有关，因此通过调节转换器的输入电压给出功率提取。为此目的，在所提出的平均电流模式控制中，内部电流回路使用电感电流作为反馈信号，这提高了转换器的动态行为，具有简单的增益。同时，外部电压环采用比例 - 一体化控制器构建，用于调节。转换器和控制策略能够跟踪快速辐照度变化。它们还能够在直流母线电压变化下保持光伏电压调节。建议控制方案的性能通过100 W转换器原型进行实验验证。

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