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Study of Energy Compensation Techniques in Photovoltaic Solar Systems with the Use of Supercapacitors in Low-Voltage Networks

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  • Luis Gerardo González

    (Department of Electrical, Electronics and Telecommunications Engineering (DEET), Universidad de Cuenca, Cuenca 010107, Ecuador)

  • Rommel Chacon

    (Department of Electrical, Electronics and Telecommunications Engineering (DEET), Universidad de Cuenca, Cuenca 010107, Ecuador)

  • Bernardo Delgado

    (Department of Electrical, Electronics and Telecommunications Engineering (DEET), Universidad de Cuenca, Cuenca 010107, Ecuador)

  • Dario Benavides

    (Department of Electrical, Electronics and Telecommunications Engineering (DEET), Universidad de Cuenca, Cuenca 010107, Ecuador
    Department of Electrical Engineering, Universidad de Málaga, 29017 Málaga, Spain)

  • Juan Espinoza

    (Department of Electrical, Electronics and Telecommunications Engineering (DEET), Universidad de Cuenca, Cuenca 010107, Ecuador)

Abstract

The power generated by photovoltaic solar systems is exposed to high variability of irradiance mainly due to weather conditions, which cause instability in the electrical networks connected to these systems. This study shows the typical behavior of solar irradiance in an Andean city, which presents considerable variations that can reach up to 63% of the nominal power of the photovoltaic system, at time intervals in the order of seconds. The study covers the application of 3 techniques to reduce power fluctuations at the point of common coupling (PCC), with the incorporation of energy storage systems, under the same irradiance conditions. Supercapacitors were used as the storage system, which were selected for their high efficiency and useful life. A state of charge control is also applied by means of a hysteresis band. The three algorithms studied show similar behaviors; however, the ramp control technique has the best performance. The storage system was dimensioned based on the photovoltaic system’s nominal power and the desired rate of change in the PCC, whose capacity can be estimated from P nom /12 [kWh] and a maximum power that can reach up to 0.63 P nom . The study determines that based on the storage capacity and the irradiance characteristics under study, the storage system could use at least 5.76 daily charge/discharge cycles. In the study, it is possible to reduce the rate of change of the photovoltaic energy injected into the PCC about 6.66 times with the use of the proposed energy storage system.

Suggested Citation

  • Luis Gerardo González & Rommel Chacon & Bernardo Delgado & Dario Benavides & Juan Espinoza, 2020. "Study of Energy Compensation Techniques in Photovoltaic Solar Systems with the Use of Supercapacitors in Low-Voltage Networks," Energies, MDPI, vol. 13(15), pages 1-15, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3755-:d:387746
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    References listed on IDEAS

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    1. Nouha Mansouri & Abderezak Lashab & Dezso Sera & Josep M. Guerrero & Adnen Cherif, 2019. "Large Photovoltaic Power Plants Integration: A Review of Challenges and Solutions," Energies, MDPI, vol. 12(19), pages 1-16, October.
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    3. Majid Ghaffarianfar & Amin Hajizadeh, 2018. "Voltage Stability of Low-Voltage Distribution Grid with High Penetration of Photovoltaic Power Units," Energies, MDPI, vol. 11(8), pages 1-13, July.
    4. Wei Ma & Wei Wang & Xuezhi Wu & Ruonan Hu & Fen Tang & Weige Zhang, 2019. "Control Strategy of a Hybrid Energy Storage System to Smooth Photovoltaic Power Fluctuations Considering Photovoltaic Output Power Curtailment," Sustainability, MDPI, vol. 11(5), pages 1-22, March.
    5. João Martins & Sergiu Spataru & Dezso Sera & Daniel-Ioan Stroe & Abderezak Lashab, 2019. "Comparative Study of Ramp-Rate Control Algorithms for PV with Energy Storage Systems," Energies, MDPI, vol. 12(7), pages 1-15, April.
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    Cited by:

    1. Cano, Antonio & Arévalo, Paul & Jurado, Francisco, 2022. "Evaluation of temporal resolution impact on power fluctuations and self-consumption for a hydrokinetic on grid system using supercapacitors," Renewable Energy, Elsevier, vol. 193(C), pages 843-856.
    2. Miguel Ángel Pardo & Héctor Fernández & Antonio Jodar-Abellan, 2020. "Converting a Water Pressurized Network in a Small Town into a Solar Power Water System," Energies, MDPI, vol. 13(15), pages 1-26, August.
    3. Ghosh, Sourav & Yadav, Sarita & Devi, Ambika & Thomas, Tiju, 2022. "Techno-economic understanding of Indian energy-storage market: A perspective on green materials-based supercapacitor technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 161(C).

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