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In this paper, the fast-charging system is designed with two power stages and limited current control algorithms. This charger can protect 5V/1500F supercapacitor module and 100 W PV panel safely. The experiment results under various solar irradiance intensity conditions are described by the characteristics of voltage and current. | Vietnam Journal of Science and Technology 57 (1) (2019) 82-91 doi:10.15625/2525-2518/57/1/10979 STUDY ON FAST CHARGER FOR 5V/1500F SUPERCAPACITOR MODULE FROM PHOTOVOLTAIC PANEL Doan Thanh Tung1, 2, *, Hoang Tran Dung1, Le Trong Lu1, 2 1 Institute for Tropical Technology, VAST, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 2 Graduate University of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi * Email: dtungtnt167@gmail.com Received: 13 December 2017; Accepted for publication: 17 November 2018 Abstract. Supercapacitor can be used for energy storage and peak power control in order to increase the efficiency and the life cycle of the system. Energy storage systems or energy buffers using supercapacitor for solar energy systems have been presented in many recent studies. However, fast-charging process for supercapacitor from photovoltaic (PV) is mentioned very little. In this paper, the fast-charging system is designed with two power stages and limited current control algorithms. This charger can protect 5V/1500F supercapacitor module and 100 W PV panel safely. The experiment results under various solar irradiance intensity conditions are described by the characteristics of voltage and current. Keywords: buck DC – DC converter, current limit control, supercapacitor (SC), photovoltaic (PV), solar energy. Classification numbers: 4.1.1; 3.4.1. 1. INTRODUCTION Worldwide growth of photovoltaics (PV) has been an exponential curve in period 20072017. The green energy or renewable energy helps to reduce environmental pollution and depletion of fuel. Investments in solar PV capacities are now rapidly growing in both connected grid and off - grid mode. Solar generation has been a reliable source for supplying electricity in regions without access to the grid for long term. The biggest solar energy plants reached over 1000 MW. In addition, electrical energy storage devices also evolved from traditional lead acid batteries to lithium ion batteries and especially .
