Intermittent FOCV using an I‐V curve tracer for minimizing energy loss

Yun Chan Im; Seung Soo Kwak; Jonghyun Park; Yong Sin Kim

doi:10.3390/app11199006

Intermittent FOCV using an I‐V curve tracer for minimizing energy loss

Yun Chan Im, Seung Soo Kwak, Jonghyun Park, Yong Sin Kim

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Conventional fractional open‐circuit voltage (FOCV) methods in maximum power point tracking (MPPT) are widely adopted for their simple structure and low computing power requirements. However, under mismatch and environmental changing conditions, the FOCV methods introduce a large amount of energy loss due to their maximum power point being fixed at the initial setup. To reduce energy loss, the intermittent FOCV MPPT proposed in this paper regularly refreshes all the parameters for each condition in time by using an I‐V curve tracer. The proposed intermittent FOCV consists of two phases: the scan and set phases. In scan phase, the I‐V curve of a photovoltaic (PV) cell is scanned and its power is calculated. In set phase, the global MPP of the PV cell is extracted and set by controlling the 8‐bit capacitance array. Simulation and calculation based on experimental results with a single PV cell show that the energy loss of the proposed intermittent FOCV under daily temperature and illuminance distributions decreased by up to 99.9% compared to that of the conventional FOCV.

Original language	English
Article number	9006
Journal	Applied Sciences (Switzerland)
Volume	11
Issue number	19
DOIs	https://doi.org/10.3390/app11199006
Publication status	Published - 2021 Oct 1

Bibliographical note

Funding Information:
Acknowledgments: This work was supported in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF), Ministry of Education, under Grant NRF‐2021R1A2C2014652. This work and the chip fabrication were supported by the IC Design Education Center (IDEC).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

Energy harvesting
I‐V curve
Maximum power point tracking (MPPT), fractional open‐circuit voltage (FOCV)
Photovoltaic (PV)

ASJC Scopus subject areas

General Materials Science
Instrumentation
General Engineering
Process Chemistry and Technology
Computer Science Applications
Fluid Flow and Transfer Processes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3390/app11199006

Cite this

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title = "Intermittent FOCV using an I‐V curve tracer for minimizing energy loss",

abstract = "Conventional fractional open‐circuit voltage (FOCV) methods in maximum power point tracking (MPPT) are widely adopted for their simple structure and low computing power requirements. However, under mismatch and environmental changing conditions, the FOCV methods introduce a large amount of energy loss due to their maximum power point being fixed at the initial setup. To reduce energy loss, the intermittent FOCV MPPT proposed in this paper regularly refreshes all the parameters for each condition in time by using an I‐V curve tracer. The proposed intermittent FOCV consists of two phases: the scan and set phases. In scan phase, the I‐V curve of a photovoltaic (PV) cell is scanned and its power is calculated. In set phase, the global MPP of the PV cell is extracted and set by controlling the 8‐bit capacitance array. Simulation and calculation based on experimental results with a single PV cell show that the energy loss of the proposed intermittent FOCV under daily temperature and illuminance distributions decreased by up to 99.9% compared to that of the conventional FOCV.",

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author = "Im, {Yun Chan} and Kwak, {Seung Soo} and Jonghyun Park and Kim, {Yong Sin}",

note = "Funding Information: Acknowledgments: This work was supported in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF), Ministry of Education, under Grant NRF‐2021R1A2C2014652. This work and the chip fabrication were supported by the IC Design Education Center (IDEC). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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N1 - Funding Information: Acknowledgments: This work was supported in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF), Ministry of Education, under Grant NRF‐2021R1A2C2014652. This work and the chip fabrication were supported by the IC Design Education Center (IDEC). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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N2 - Conventional fractional open‐circuit voltage (FOCV) methods in maximum power point tracking (MPPT) are widely adopted for their simple structure and low computing power requirements. However, under mismatch and environmental changing conditions, the FOCV methods introduce a large amount of energy loss due to their maximum power point being fixed at the initial setup. To reduce energy loss, the intermittent FOCV MPPT proposed in this paper regularly refreshes all the parameters for each condition in time by using an I‐V curve tracer. The proposed intermittent FOCV consists of two phases: the scan and set phases. In scan phase, the I‐V curve of a photovoltaic (PV) cell is scanned and its power is calculated. In set phase, the global MPP of the PV cell is extracted and set by controlling the 8‐bit capacitance array. Simulation and calculation based on experimental results with a single PV cell show that the energy loss of the proposed intermittent FOCV under daily temperature and illuminance distributions decreased by up to 99.9% compared to that of the conventional FOCV.

AB - Conventional fractional open‐circuit voltage (FOCV) methods in maximum power point tracking (MPPT) are widely adopted for their simple structure and low computing power requirements. However, under mismatch and environmental changing conditions, the FOCV methods introduce a large amount of energy loss due to their maximum power point being fixed at the initial setup. To reduce energy loss, the intermittent FOCV MPPT proposed in this paper regularly refreshes all the parameters for each condition in time by using an I‐V curve tracer. The proposed intermittent FOCV consists of two phases: the scan and set phases. In scan phase, the I‐V curve of a photovoltaic (PV) cell is scanned and its power is calculated. In set phase, the global MPP of the PV cell is extracted and set by controlling the 8‐bit capacitance array. Simulation and calculation based on experimental results with a single PV cell show that the energy loss of the proposed intermittent FOCV under daily temperature and illuminance distributions decreased by up to 99.9% compared to that of the conventional FOCV.

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Intermittent FOCV using an I‐V curve tracer for minimizing energy loss

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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