Sliding Mode Control Based Energy Harvesting System For Low Power Applications

Honorio Martinez Sarmiento, Maen Marji, Cheaheng Lim, Jonghoon Kim, Nan Wang, W. Na
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Abstract

As technology advances and cities become more innovative, the need to harvest energy to power intelligent devices at remote locations, such as wireless sensors, is increasing. This paper focuses on studying and simulating an energy management system (EMS) for energy harvesting with a battery and a supercapacitor for low power applications. Lithium-ion batteries are the primary energy storage source for low power applications due to their high energy density and efficiency. On the other hand, the supercapacitors excel in fast charge and discharge. Furthermore, supercapacitors tolerate high currents due to their low equivalent series resistance (ESR). The supercapacitor in the system increases the time response of the power delivery to the load, and it also absorbs the high currents in the system. Moreover, the supercapacitor covers short-time load demand due to the fluctuation of the renewable source. The EMS monitors the proposed system to maintain power to the load either from the renewable source or the energy storage. The power flow of the energy storage is controlled via DC-DC bidirectional converters. The lithium-ion battery is charged via a constant current (CC) using a sliding mode controller (SMC) and a constant voltage (CV) via a typical PI controller. The response of the SMC current controller is compared with PI and Fuzzy current controller. Furthermore, the performance of a system having and not having a supercapacitor is compared. Finally, MATLAB modeling system simulation and experimental implementation results are analyzed and presented.
基于滑模控制的低功耗能量收集系统
随着技术的进步和城市变得更加创新,收集能源为远程智能设备(如无线传感器)供电的需求正在增加。本文主要研究和模拟了一种低功耗电池和超级电容器能量收集的能量管理系统。锂离子电池因其高能量密度和高能效而成为低功耗应用的主要储能源。另一方面,超级电容器在快速充放电方面具有优势。此外,由于超级电容器具有较低的等效串联电阻(ESR),因此可以承受大电流。系统中的超级电容器增加了向负载输送电力的时间响应,同时也吸收了系统中的大电流。此外,由于可再生能源的波动,超级电容器可以满足短期负荷需求。EMS监控所建议的系统是否从可再生能源或能源存储中维持对负载的电力。通过直流-直流双向变换器控制储能系统的功率流。锂离子电池通过使用滑模控制器(SMC)的恒流(CC)和通过典型PI控制器的恒压(CV)充电。比较了SMC电流控制器与PI和模糊电流控制器的响应。此外,还比较了有超级电容器和没有超级电容器的系统的性能。最后,对系统的MATLAB建模仿真和实验实现结果进行了分析和介绍。
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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