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http://dx.doi.org/10.7471/ikeee.2020.24.2.392

Photo-Sensorless Solar Tracking System based on Modular Structure and IoT Technology  

Kim, Dae-Won (Dept. of Electronic & Electrical Engineering, Hongik University)
Kim, Jeong-Tae (Dept. of Electronic & Electrical Engineering, Hongik University)
Chung, Gyo-Bum (Dept. of Electronic & Electrical Engineering, Hongik University)
Publication Information
Journal of IKEEE / v.24, no.2, 2020 , pp. 392-402 More about this Journal
Abstract
This paper proposes a solar tracking system without photo-sensors. The system can be classified into four modules: Solar Tracking, MPPT, ESS, and Real-Time Monitoring. Nine solar panels, as a basic unit, are adopted with grid structures of different heights to reduce wind influence and to enable solar tracking without photo-sensors. The low-cost MCU implements MPPT method which generates PWM switching signal for boost converter. The unit of ESS consists of three-series and four-parallel lithium-ion batteries in order to enable monitoring for abnormalities in temperature and electrical characteristics of battery. Four MCUs used in the system consists of two AVR Atmega128, and two Raspberry PI, and they exchanges operation informations. Experimental results of the proposed system show the solar tracking performance, the possibility of on-site and remote monitoring and the convenience of maintenance based on IoT technology.
Keywords
Photo-Sensorless; Solar tracking; MPPT; ESS; Modular Structure; IoT; MCU;
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