This paper proposes a super capacitor energy storage-based modular multilevel converter\n(SCES-MMC) for mine hoist application. Different from the conventional MMCs, the sub-modules\nemploy distributed super capacitor banks, which are designed to absorb the regenerative energy\nof mine hoist and released in the traction condition, so as to improve energy utilization efficiency.\nThe key control technologies are introduced in detail, followed by analysis of the configuration and\noperation principles. The feasibility of the proposed SCES-MMC topology and the control theory are\nalso verified. Simulation results show that SCES-MMC can adapt to the variable frequency speed\nregulation of the motor drive, which shows good application prospects in the future for mediumand\nhigh-voltage mine hoist systems.
Loading....