Authors

Yongqing MENG, Yichao ZOU, Huixuan LI, Jianyang YU, Xifan WANG

Abstract

A fractional frequency transmission system (FFTS) is the most competitive choice for long distance transmission of offshore wind power, while the Hexverter, as a newly proposed direct AC/AC converter, is an attractive choice for its power conversion. This paper proposes a novel control scheme characterizing the global stability and strong robustness of the Hexverter in FFTS applications, which are based on the interconnection and damping assignment passivity-based control (IDA-PBC) methodology. Firstly, the frequency decoupled model of the Hexverter is studied and then a port-controlled Hamiltonian (PCH) model is built. On this basis, the IDA-PB control scheme of the Hexverter is designed. Considering the interference of system parameters and unmodeled dynamics, integrators are added to the IDA-PB controller to eliminate the steady-state error. In addition, the voltage-balancing control is applied in order to balance the capacitor DC voltages to obtain a better performance. Finally, the simulation results and experimental results are presented to verify the effectiveness and superiority of the IDA-PB controller.

Keywords

Fractional frequency transmission system (FFTS); Hexverter; Port-controlled Hamiltonian (PCH) system; Interconnection and damping assignment passivity-based control (IDA-PBC)

Citation

  • Journal: Journal of Modern Power Systems and Clean Energy
  • Year: 2019
  • Volume: 7
  • Issue: 6
  • Pages: 1495–1506
  • Publisher: Springer Science and Business Media LLC
  • DOI: 10.1007/s40565-019-0549-y

BibTeX

@article{MENG_2019,
  title={{A global asymptotical stable control scheme for a Hexverter in fractional frequency transmission systems}},
  volume={7},
  ISSN={2196-5420},
  DOI={10.1007/s40565-019-0549-y},
  number={6},
  journal={Journal of Modern Power Systems and Clean Energy},
  publisher={Springer Science and Business Media LLC},
  author={MENG, Yongqing and ZOU, Yichao and LI, Huixuan and YU, Jianyang and WANG, Xifan},
  year={2019},
  pages={1495--1506}
}

Download the bib file

References

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