Authors

Seyed Mohammad Azimi, Saeed Lotfifard

Abstract

In this paper, a unified damping assignment passivity based control scheme (UDA-PBC) is proposed for PV-plants (PV-P) in the form of power conversion unit (PCU) connected to distribution power grids (DPGs). The PCU includes a super-capacitor unit (SCU), bidirectional buck/boost converter interfacing SCU to DC-link capacitor, and grid-side voltage-source converter (VSC) operating in cooperation with SCU. According to the maximum power point tracking (MPPT) algorithm, the boost converter extracts maximum active power from PV-P and feeds the power to the PCU. Then, the PCU using the unified operation of SCU and VSC based on the proposed control scheme damps possible DC-side and AC-side power oscillations and delivers the power smoothly to the DPG. To this end, the model of output filter associated to VSC in synchronous reference frame (SRF), DC-link capacitor, SCU are modeled as a 5-order nonlinear state space equation and represented in the port controlled Hamiltonian (PCH) form. Then, the unified nonlinear control of PCU is designed with the utilization of DA-PBC idea applied to the developed model. In addition to mathematical stability proofs, the effectiveness of the proposed strategy is verified based on a set of time-domain simulations and comparisons with conventional methods.

Citation

  • Journal: IEEE Transactions on Energy Conversion
  • Year: 2024
  • Volume: 39
  • Issue: 4
  • Pages: 2258–2268
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)
  • DOI: 10.1109/tec.2024.3406147

BibTeX

@article{Azimi_2024,
  title={{Unified Damping Assignment Passivity Based Controller for Power Conversion Units of Solar Power Plants}},
  volume={39},
  ISSN={1558-0059},
  DOI={10.1109/tec.2024.3406147},
  number={4},
  journal={IEEE Transactions on Energy Conversion},
  publisher={Institute of Electrical and Electronics Engineers (IEEE)},
  author={Azimi, Seyed Mohammad and Lotfifard, Saeed},
  year={2024},
  pages={2258--2268}
}

Download the bib file

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