Improving the Energy Storage of Standalone PV Systems while Enhancing the Charging Efficiency using Supercapacitors

Piyumal, P L A K; Ranaweera, A. L. A. K.; Kalingamudali, S.R.D.; Kularatna, Nihal

doi:10.1109/icit.2019.8755174

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Hence, the potential power charged into the battery can be expressed as (6). In [23], the efficiency of the charging circuit normally is 80% and can increase to 89% by using a supercapacitor instead of a conventional capacitor.…”

Section: Solar Irradiance and Solar Charging Modelsmentioning

confidence: 99%

Optimal Data Transfer of SEH-WSN Node via MDP Based on Duty Cycle and Battery Energy

2021

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Applications in wireless sensor networks (WSNs) are rapidly spreading out over the world. The one critical point of WSNs is energy consumption, where the transmitted data is limited by battery energy. Solar energy is used to handle the depletion of the battery energy via photo voltaic (PV) panels. A solar energy harvesting WSN (SEH-WSN) node utilizes exponential decision-dynamic duty cycle scheduling based on prospective increase in energy (ED-DSP) to save battery energy by adjusting the duty cycle from an exponential curve and future solar energy. To estimate the prospective solar energy, a prediction technique is applied, but does not guarantee 100% accuracy. Hence, this paper proposes a Markov Decision Process (MDP) to schedule a duty cycle of an SEH-WSN node instead of the ED-DSP depending on the predicted energy. We evaluate its performance via MATLAB simulations with simple irradiance models and real annual irradiance data. The results show that the MDP policy outperforms the ED-DSP.

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Section: Solar Irradiance and Solar Charging Modelsmentioning

confidence: 99%

Optimal Data Transfer of SEH-WSN Node via MDP Based on Duty Cycle and Battery Energy

2021

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“…However, authors of [23] have proposed a novel method of connecting an SC bank to RC circuit where SC is connected in series with a useful resistive load, leading to a higher end to end efficiency of the overall system. Reference [24] shows an application of this theory which uses a buck converter with a battery bank as the useful load in the capacitor charging loop to enhance system efficiency for a PV system.…”

Section: Introductionmentioning

confidence: 99%

Supercapacitor Assisted Hybrid PV System for Efficient Solar Energy Harnessing

et al. 2021

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In photovoltaic (PV) systems, maximum power point (MPP) is tracked by matching the load impedance to the internal impedance of the PV array by adjusting the duty cycle of the associated DC-DC converter. Scientists are trying to improve the efficiency of these converters by improving the performance of the power stage, while limited attention is given to finding alternative methods. This article describes a novel supercapacitor (SC) assisted technique to enhance the efficiency of a PV system without modifying the power stage of the charge controller. The proposed system is an SC—battery hybrid PV system where an SC bank is coupled in series with a PV array to enhance the overall system efficiency. Developed prototype of the proposed system with SC assisted loss circumvention embedded with a DC microgrid application detailed in the article showed that the average efficiency of the PV system is increased by 8%. This article further describes the theoretical and experimental investigation of the impedance matching technique for the proposed PV system, explaining how to adapt typical impedance matching for maximum power transfer.

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Analysis of Impedance Matching Technique for Novel Supercapacitor Assisted PV Systems

Piyumal

Ranaweera

Kalingamudali

et al. 2020

IECON 2020 the 46th Annual Conference of the IEEE Industrial Electronics Society

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Improving the Energy Storage of Standalone PV Systems while Enhancing the Charging Efficiency using Supercapacitors

Cited by 4 publications

References 6 publications

Optimal Data Transfer of SEH-WSN Node via MDP Based on Duty Cycle and Battery Energy

Optimal Data Transfer of SEH-WSN Node via MDP Based on Duty Cycle and Battery Energy

Supercapacitor Assisted Hybrid PV System for Efficient Solar Energy Harnessing

Analysis of Impedance Matching Technique for Novel Supercapacitor Assisted PV Systems

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