Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Comparison of Capacitor Voltage Balancing Methods for 1GW MMC-HVDC Based on Real-Time Digital Simulator and Physical Control Systems

  • Lee, Jun-Min (Department of Electrical Engineering, Pusan National University) ;
  • Park, Jung-Woo (Korea Electrotechnology Research Institute) ;
  • Kang, Dae-Wook (Korea Electrotechnology Research Institute) ;
  • Lee, Jong-Pil (Korea Electrotechnology Research Institute) ;
  • Yoo, Dong-Wook (Korea Electrotechnology Research Institute) ;
  • Lee, Jang-Myung (Department of Electrical Engineering, Pusan National University)
  • Received : 2018.12.14
  • Accepted : 2019.05.29
  • Published : 2019.09.20
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Abstract

Modular Multilevel Converter (MMC)-based HVDC power transmission using a real-time simulator is one of the key technologies in power electronics research. This paper introduces the design methodology of a physical MMC-HVDC control system based on a Field-Programmable Gate Array (FPGA), which has the advantage of high-speed parallel operation, and validates the accuracy of MMC-HVDC control when operated with a Real-Time Digital Simulator (RTDS). Finally, this paper compares and analyzes the characteristics of capacitor voltage balancing methods such as Nearest Level Control (NLC), NLC with a reduced switching frequency, and tolerance band modulation implemented on physical control system.

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References

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