Comparison of Capacitor Voltage Balancing Methods for 1GW MMC-HVDC Based on Real-Time Digital Simulator and Physical Control Systems

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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Cite this article

[IEEE Style]

J. Lee, J. Park, D. Kang, J. Lee, D. Yoo, J. Lee, "Comparison of Capacitor Voltage Balancing Methods for 1GW MMC-HVDC Based on Real-Time Digital Simulator and Physical Control Systems," Journal of Power Electronics, vol. 19, no. 5, pp. 1171-1181, 2019. DOI: https://doi.org/10.6113/JPE.2019.19.5.1171.

[ACM Style]

Jun-Min Lee, Jung-Woo Park, Dae-Wook Kang, Jong-Pil Lee, Dong-Wook Yoo, and Jang-Myung Lee. 2019. Comparison of Capacitor Voltage Balancing Methods for 1GW MMC-HVDC Based on Real-Time Digital Simulator and Physical Control Systems. Journal of Power Electronics, 19, 5, (2019), 1171-1181. DOI: https://doi.org/10.6113/JPE.2019.19.5.1171.