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Implementation of a Modular Distributed Fault-Tolerant Controller for MMC Applications

Author

Listed:
  • Semih Isik

    (Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27606, USA)

  • Vasishta Burugula

    (Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27606, USA)

  • Mohammed Alharbi

    (Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia)

  • Ali Azidehak

    (Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27606, USA)

  • Subhashish Bhattacharya

    (Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC 27606, USA)

Abstract

Centralized control algorithm limits the hardware flexibility of a modular multilevel converter (MMC). Therefore, distributed control structure has recently started to be seen in the industry application. Even though distributed controller reduces a single point of failure risk compared to the centralized controller, the failure risk of the entire control systems increases due to the number of local controllers. However, the distributed controller can be programmed in such a way as to replace the faulty local controller and sustain the MMC operation. In this paper, the distributed modular fault-tolerant controller is implemented in a laboratory-scale MMC prototype. The controller is built to control four SMs per phase for the proof-of-concept. Therefore, the MMC prototype is also built by two SMs per arm. The controller capability is validated with experimental and the Opal-RT result-time simulator results in a control-hardware-in-loop (CHIL) environment.

Suggested Citation

  • Semih Isik & Vasishta Burugula & Mohammed Alharbi & Ali Azidehak & Subhashish Bhattacharya, 2022. "Implementation of a Modular Distributed Fault-Tolerant Controller for MMC Applications," Energies, MDPI, vol. 15(22), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:22:p:8427-:d:969316
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