Title :
Control of hexagonal Modular Multilevel Converter for 3-phase BTB system
Author :
Hamasaki, Shin-ichi ; Okamura, Kotaro ; Tsubakidani, Takashi ; Tsuji, Mineo
Author_Institution :
Div. of Electr. Eng. & Comput. Sci., Nagasaki Univ., Nagasaki, Japan
Abstract :
The Modular Multilevel Converter (MMC) with cascaded full bridge cells is available for AC/AC transmission system without transformers in high voltage line. This research applied a Hexagonal MMC (H-MMC) to 3-phase AC-AC back-to-back (BTB) system. The H-MMC has six arm modules with floating capacitors and is required to regulate the input-output power and capacitor voltages by controlling currents in arm modules. Theory of the power flow of H-MMC is analyzed and the control scheme of the power flow and capacitor voltage regulation is proposed. Currents in the arm modules are controlled by the internal model principle and H-MMC can operate appropriately. Effectiveness of the proposed control method is presented in simulation and experiment.
Keywords :
AC-AC power convertors; electric current control; load flow control; power control; voltage control; 3-phase AC-AC back-to-back system; 3-phase BTB system; AC-AC transmission system; capacitor voltage regulation; cascaded full bridge cells; current control; floating capacitors; hexagonal MMC; hexagonal modular multilevel converter control; input-output power regulation; internal model principle; power flow control; Equations; Field programmable gate arrays; Mathematical model; AC/AC converter; back to back system; modular multilevel converter; power flow control;
Conference_Titel :
Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE-ASIA), 2014 International
Conference_Location :
Hiroshima
DOI :
10.1109/IPEC.2014.6870026
