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Modeling of Step-up Grid-Connected Photovoltaic Systems for Control Purposes

Author

Listed:
  • Adriana Trejos

    (Instituto Tecnologico Metropolitano, Medellin 05001000, Colombia)

  • Daniel Gonzalez

    (Universidad Nacional de Colombia, Medellin 05001000, Colombia)

  • Carlos Andres Ramos-Paja

    (Universidad Nacional de Colombia, Medellin 05001000, Colombia)

Abstract

This paper presents modeling approaches for step-up grid-connected photovoltaic systems intended to provide analytical tools for control design. The first approach is based on a voltage source representation of the bulk capacitor interacting with the grid-connected inverter, which is a common model for large DC buses and closed-loop inverters. The second approach considers the inverter of a double-stage PV system as a Norton equivalent, which is widely accepted for open-loop inverters. In addition, the paper considers both ideal and realistic models for the DC/DC converter that interacts with the PV module, providing four mathematical models to cover a wide range of applications. The models are expressed in state space representation to simplify its use in analysis and control design, and also to be easily implemented in simulation software, e.g., Matlab. The PV system was analyzed to demonstrate the non-minimum phase condition for all the models, which is an important aspect to select the control technique. Moreover, the system observability and controllability were studied to define design criteria. Finally, the analytical results are illustrated by means of detailed simulations, and the paper results are validated in an experimental test bench.

Suggested Citation

  • Adriana Trejos & Daniel Gonzalez & Carlos Andres Ramos-Paja, 2012. "Modeling of Step-up Grid-Connected Photovoltaic Systems for Control Purposes," Energies, MDPI, vol. 5(6), pages 1-27, June.
    • Handle: RePEc:gam:jeners:v:5:y:2012:i:6:p:1900-1926:d:18381
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    References listed on IDEAS

    as
    1. Her-Terng Yau & Chen-Han Wu, 2011. "Comparison of Extremum-Seeking Control Techniques for Maximum Power Point Tracking in Photovoltaic Systems," Energies, MDPI, vol. 4(12), pages 1-16, December.
    2. Noroozian, R. & Abedi, M. & Gharehpetian, G.B. & Hosseini, S.H., 2009. "Combined operation of DC isolated distribution and PV systems for supplying unbalanced AC loads," Renewable Energy, Elsevier, vol. 34(3), pages 899-908.
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    Citations

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    Cited by:

    1. Sergio Ignacio Serna-Garcés & Daniel Gonzalez Montoya & Carlos Andres Ramos-Paja, 2016. "Sliding-Mode Control of a Charger/Discharger DC/DC Converter for DC-Bus Regulation in Renewable Power Systems," Energies, MDPI, vol. 9(4), pages 1-27, March.
    2. Suliang Ma & Mingxuan Chen & Jianwen Wu & Wenlei Huo & Lian Huang, 2016. "Augmented Nonlinear Controller for Maximum Power-Point Tracking with Artificial Neural Network in Grid-Connected Photovoltaic Systems," Energies, MDPI, vol. 9(12), pages 1-24, November.
    3. Yaqiong Li & Zhanfeng Deng & Tongxun Wang & Guoliang Zhao & Shengjun Zhou, 2018. "Coupled Harmonic Admittance Identification Based on Least Square Estimation," Energies, MDPI, vol. 11(10), pages 1-15, September.
    4. Paula Andrea Ortiz Valencia & Carlos Andres Ramos-Paja, 2015. "Sliding-Mode Controller for Maximum Power Point Tracking in Grid-Connected Photovoltaic Systems," Energies, MDPI, vol. 8(11), pages 1-25, November.
    5. Carlos Andres Ramos-Paja & Oscar Danilo Montoya & Luis Fernando Grisales-Noreña, 2022. "Adaptive Sliding-Mode Controller for Flyback-Based PV Systems Featuring Constant Switching Frequency," Mathematics, MDPI, vol. 10(8), pages 1-27, April.
    6. Diego Alejandro Herrera-Jaramillo & Elkin Edilberto Henao-Bravo & Daniel González Montoya & Carlos Andrés Ramos-Paja & Andrés Julián Saavedra-Montes, 2021. "Control-Oriented Model of Photovoltaic Systems Based on a Dual Active Bridge Converter," Sustainability, MDPI, vol. 13(14), pages 1-22, July.

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