TY - GEN
T1 - A power electronic transformer with sinusoidal voltages and currents using modular multilevel converter
AU - Sahoo, Ashish Kumar
AU - Mohan, Ned
PY - 2014
Y1 - 2014
N2 - Power electronic transformer consisting of power converters and a high frequency transformer (HFT) can be used to interface a low voltage machine to a high voltage grid. A modular multilevel converter (MMC) is proposed as the power converter on the high voltage side to generate high frequency, adjustable magnitude sinusoidal voltages. A matrix converter (MC) is used on the low voltage side to synthesize three-phase adjustable frequency PWM AC at the machine terminals. With the leakage inductance of the transformer, a capacitor bank forms an LC filter to result in sinusoidal currents through the HFT. With sinusoidal voltages and currents through the transformer, there is significant reduction in transformer losses and also natural commutation of leakage energy is obtained. The magnitude of the output voltage requirement by the machine is met by controlling the output voltage of the MMC on the primary of the HFT, to result in reduced voltage stress and losses in the transformer, secondary side converter and the machine. The operating principle, modulation and control of the proposed PET is validated by simulations in MATLAB/Simulink.
AB - Power electronic transformer consisting of power converters and a high frequency transformer (HFT) can be used to interface a low voltage machine to a high voltage grid. A modular multilevel converter (MMC) is proposed as the power converter on the high voltage side to generate high frequency, adjustable magnitude sinusoidal voltages. A matrix converter (MC) is used on the low voltage side to synthesize three-phase adjustable frequency PWM AC at the machine terminals. With the leakage inductance of the transformer, a capacitor bank forms an LC filter to result in sinusoidal currents through the HFT. With sinusoidal voltages and currents through the transformer, there is significant reduction in transformer losses and also natural commutation of leakage energy is obtained. The magnitude of the output voltage requirement by the machine is met by controlling the output voltage of the MMC on the primary of the HFT, to result in reduced voltage stress and losses in the transformer, secondary side converter and the machine. The operating principle, modulation and control of the proposed PET is validated by simulations in MATLAB/Simulink.
KW - High frequency transformer (HFT)
KW - matrix converter (MC)
KW - modular multilevel converter (MMC)
KW - power electronic transformer (PET)
KW - pulse-width modulation (PWM)
UR - http://www.scopus.com/inward/record.url?scp=84906673133&partnerID=8YFLogxK
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U2 - 10.1109/IPEC.2014.6870037
DO - 10.1109/IPEC.2014.6870037
M3 - Conference contribution
AN - SCOPUS:84906673133
SN - 9781479927050
T3 - 2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
SP - 3750
EP - 3757
BT - 2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
PB - IEEE Computer Society
T2 - 7th International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
Y2 - 18 May 2014 through 21 May 2014
ER -