JIITA

Combined Control Algorithm for a DC-DC Converter of PV & Battery for Mongolian Nomadic Life

JIITA, vol. 1, no. 4, pp.64-71, Dec, 2017

DOI: 10.22664/ISITA.2017.1.3.52

Combined Control Algorithm for a DC-DC Converter of PV & Battery for Mongolian Nomadic Life

Tuvdensuren Oyunjargal, Tat-Thang Le, Minwon Park, and In-Keun Yu
Department of Electrical Engineering Changwon National University Changwon, Rep. of Korea

Abstract: A stand-alone Photovoltaic (PV) system is one of the most important energy system for Mongolian nomadic herders. Basically, a stand-alone PV system uses two DC-DC converters. This makes the system costly, big size and difficult for reparation and moving especial-ly by the nomadic herders. This paper aims at the performance en-hancement of one DC-DC boost converter for both charging battery and Maximum Power Point Tracking (MPPT) control. The batteries are charged by using three stage method in which the first stage is replaced by the MPPT function. The performance of the DC-DC converter in which battery voltage and current charging with modified control algo-rithm under changing conditions is evaluated and the results are ob-tained using PSIM software. The results obtained in this paper are use-ful in designing a stand-alone PV system in the rural life like Mongoli-an nomadic herders.

Keyword:  PPT; DC-DC boost converter; Battery charger; PV; SOC;

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