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Digital proportional multi-resonant current controller for improving grid-connected photovoltaic systems

Author

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  • Almeida, Pedro M.
  • Barbosa, Pedro G.
  • Oliveira, Janaina G.
  • Duarte, Jorge L.
  • Ribeiro, Paulo F.

Abstract

This paper presents the modelling and design steps of a digital proportional multi-resonant controller used in a grid-connected photovoltaic (PV) system. It is shown that the use of only one Proportional-Resonant (PR) compensator, tuned to the system fundamental frequency, may have its effectiveness compromised due to nonlinearities in the system components. To overcome this drawback and improve the system's output current waveform, a multi-resonant controller is introduced. The performance of the discrete-time designed controller is tested on a grid-connected photovoltaic power plant. Experimental results obtained with the operation of a 30 kWp PV system connected to a distribution network, using only the leakage inductances of a connection transformer as passive filter are presented and discussed to demonstrate the performance of the designed control strategy.

Suggested Citation

  • Almeida, Pedro M. & Barbosa, Pedro G. & Oliveira, Janaina G. & Duarte, Jorge L. & Ribeiro, Paulo F., 2015. "Digital proportional multi-resonant current controller for improving grid-connected photovoltaic systems," Renewable Energy, Elsevier, vol. 76(C), pages 662-669.
  • Handle: RePEc:eee:renene:v:76:y:2015:i:c:p:662-669
    DOI: 10.1016/j.renene.2014.11.087
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    Cited by:

    1. Yang, Lian & Tai, Nengling & Fan, Chunju & Meng, Yuanye, 2016. "Energy regulating and fluctuation stabilizing by air source heat pump and battery energy storage system in microgrid," Renewable Energy, Elsevier, vol. 95(C), pages 202-212.
    2. Chandramouli Adupa & V. Sivachidambaranathan, 2022. "Critical analysis on cascaded T-type multilevel inverter topology to grid-integrated photovoltaic systems for symmetrical voltage ratios," International Journal of System Assurance Engineering and Management, Springer;The Society for Reliability, Engineering Quality and Operations Management (SREQOM),India, and Division of Operation and Maintenance, Lulea University of Technology, Sweden, vol. 13(3), pages 1474-1484, June.

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