Analog-Mixed-Signal Simulation of DC-DC Boost-Based MPPT System Taking into Account Weather Conditions Variations

2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS) Pub Date : 2019-11-01 DOI:10.1109/ICECS46596.2019.8964815

F. Bizzarri, A. Brambilla, A. E. Aroudi

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Abstract

DC-DC converters are widely used as interfaces between photovoltaic (PV) sources and loads in different applications. These devices use inductors as energy storage elements for controlling the power flow from the PV source to the load. These systems are usually designed using conventional linear small-signal approaches in the vicinity of an operating point. However, the operating point of a PV system is highly dependent on the environmental conditions such as the irradiance and the temperature. Irradiance and temperature changes make the system work at different power and current levels. The inductance of a nonlinear real inductor strongly depends on the operating current. In this paper, a study of a boost converter used for maximum power point tracking is presented by taking into account the inductor nonlinearity till saturation and the variation of its inductance with the weather conditions. To this end analog-mixed-signal circuit simulations are used to show the effects of the weather conditions on the dynamical behavior of the overall PV system.

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考虑天气条件变化的DC-DC升压MPPT系统模拟混合信号仿真

DC-DC变换器作为光伏电源和负载之间的接口，在不同的应用中得到了广泛的应用。这些装置使用电感作为能量存储元件来控制从光伏电源到负载的功率流。这些系统通常在工作点附近使用传统的线性小信号方法设计。然而，光伏系统的工作点高度依赖于环境条件，如辐照度和温度。辐照度和温度的变化使系统在不同的功率和电流水平下工作。非线性实电感的电感很大程度上依赖于工作电流。本文研究了一种用于最大功率点跟踪的升压变换器，考虑了电感器在饱和前的非线性以及电感随天气条件的变化。为此，模拟混合信号电路模拟用于显示天气条件对整个光伏系统动力学行为的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 26th IEEE International Conference on Electronics, Circuits and Systems (ICECS)

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