TY - GEN
T1 - Trapezoidal Current Mode for Bidirectional High Step Ratio Modular Multilevel dc-dc Converter
AU - Pineda, C.
AU - Pereda, J.
AU - Neira, S.
AU - Bravo, P.
AU - Rodriguez, J.
AU - Garcia, C.
N1 - Funding Information:
The authors gratefully acknowledge the financial support provided by CONICYT through FONDECYT 1171142, SERC Chile (CONICYT/FONDAP/15110019), and the UC Energy Research Center of Pontificia Universidad Católica de Chile.
PY - 2019/12
Y1 - 2019/12
N2 - High voltage direct current (HVDC) transmission systems and low voltage direct current (LVDC) networks are becoming popular due to their advantages and present feasibility, mainly pushed by the advance in power electronics. However, one of the main drawbacks of dc networks is the lack of a dc-dc converter that performs as the ac transformer in terms of efficiency, reliability and high-step voltage ratio, specially in medium and high voltage. Modular multilevel converters are an attractive alternative because they can manage medium and high dc voltages with standard semiconductor devices, and they can achieve high efficiency with soft switching modulation, such as resonant, trapezoidal or triangular currents usually used in double active bridges (DAB). This paper proposes a novel generalized trapezoidal current mode applied to high step ratio Modular Multilevel dc-dc Converters. The proposed modulation increases the efficiency and achieves bidirectional control of the power, soft-switching and a natural balance of the voltage in the capacitors. The simulation results show the bidirectional operation and the capacitor voltage balance of the converter under different operating conditions with high efficiency (98.2%).
AB - High voltage direct current (HVDC) transmission systems and low voltage direct current (LVDC) networks are becoming popular due to their advantages and present feasibility, mainly pushed by the advance in power electronics. However, one of the main drawbacks of dc networks is the lack of a dc-dc converter that performs as the ac transformer in terms of efficiency, reliability and high-step voltage ratio, specially in medium and high voltage. Modular multilevel converters are an attractive alternative because they can manage medium and high dc voltages with standard semiconductor devices, and they can achieve high efficiency with soft switching modulation, such as resonant, trapezoidal or triangular currents usually used in double active bridges (DAB). This paper proposes a novel generalized trapezoidal current mode applied to high step ratio Modular Multilevel dc-dc Converters. The proposed modulation increases the efficiency and achieves bidirectional control of the power, soft-switching and a natural balance of the voltage in the capacitors. The simulation results show the bidirectional operation and the capacitor voltage balance of the converter under different operating conditions with high efficiency (98.2%).
KW - dc-dc conversion
KW - high step ratio conversion
KW - modular multilevel converter
KW - soft switching
KW - trapezoidal current mode
KW - triangular current mode
UR - http://www.scopus.com/inward/record.url?scp=85084921711&partnerID=8YFLogxK
U2 - 10.1109/COBEP/SPEC44138.2019.9065528
DO - 10.1109/COBEP/SPEC44138.2019.9065528
M3 - Conference contribution
AN - SCOPUS:85084921711
T3 - 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference, COBEP/SPEC 2019
BT - 2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference, COBEP/SPEC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 15th IEEE Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference, COBEP/SPEC 2019
Y2 - 1 December 2019 through 4 December 2019
ER -