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Power management and bus voltage control of a battery backup-based stand-alone PV system

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Abstract

The modeling and control of a stand-alone solar photovoltaic with battery backup-based hybrid system is implemented in this paper. Normally, a hybrid PV system needs a complex control scheme to handle different modes of operations. Mostly, a supervisory control is necessary to supervise the change in controller arrangement depending on the applied mode. The proposed system consists of a dc–dc boost converter, a single-phase inverter and a bidirectional dc–dc converter. The PV array is interfaced through a dc–dc boost converter and is controlled with the help of an MPPT controller to extract the maximum power. The battery backup unit is integrated with the PV system through a common dc bus for the power management within the system as well as to maintain a constant dc bus voltage. The power exchange between the battery and dc bus can be controlled by a bidirectional buck–boost converter. The system can be operated with or without battery units, having no alteration of the control configuration, as a result use of complex supervisory controller can be avoided. For simple circuit architecture to be realizable, a control scheme based on sliding mode control is designed for the full-bridge inverter. Its purpose is to maintain a sinusoidal output voltage with small steady-state error, lower total harmonic distortion (THD) and excellent dynamic response under step change in load. Finally, the simulation results from a two-stage 2 kW, 110 V, single-phase stand-alone PV system are provided to confirm the theoretical analysis, effectiveness and feasibility of the proposed control scheme.

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Authors and Affiliations

  1. School of Electrical Engineering, KIIT, Bhubaneswar, India

    Pradeep Kumar Sahu & Satyaranjan Jena

  2. Photovoltaic (PV) Research Laboratory, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram, Chennai, India

    B. Chitti Babu

Authors
  1. Pradeep Kumar Sahu
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  2. Satyaranjan Jena
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  3. B. Chitti Babu
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Correspondence to Satyaranjan Jena.

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Sahu, P.K., Jena, S. & Babu, B.C. Power management and bus voltage control of a battery backup-based stand-alone PV system. Electr Eng 104, 97–110 (2022). https://doi.org/10.1007/s00202-021-01391-6

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  • DOI: https://doi.org/10.1007/s00202-021-01391-6

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