TY - GEN
T1 - DC ripple current reduction on multilevel, multiport, single-phase DC/AC converter for renewable energy applications
AU - Alsolami, Mohammed
AU - Wang, Jin
AU - Herrera, Luis
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/12/30
Y1 - 2015/12/30
N2 - This paper presents a new approach for DC-link 120 Hz ripple power cancellation in single-phase DC/AC converter for renewable energy applications. The converter utilizes the superior features of the switched capacitor circuit and the gallium nitride devices to achieve high efficiency and power density. The system has two-port, the first acts as a pure capacitor and can achieve continuous variable ac capacitor 0 ∼ Cac to absorb the 120 Hz dc ripple power whereas the second port is designed to be the output. A small size DC-link capacitor can be achieved through adjusting the phase angle between the two-ac port voltages of the converter to cancel the second-order frequency. The theoretical analysis confirms that the 2ω component can be entirely eliminated from the system and a 2 kW prototype is built to verify the circuit analysis. Comparing to the conventional H-bridge converter, the ac capacitance can be reduced by 80 times.
AB - This paper presents a new approach for DC-link 120 Hz ripple power cancellation in single-phase DC/AC converter for renewable energy applications. The converter utilizes the superior features of the switched capacitor circuit and the gallium nitride devices to achieve high efficiency and power density. The system has two-port, the first acts as a pure capacitor and can achieve continuous variable ac capacitor 0 ∼ Cac to absorb the 120 Hz dc ripple power whereas the second port is designed to be the output. A small size DC-link capacitor can be achieved through adjusting the phase angle between the two-ac port voltages of the converter to cancel the second-order frequency. The theoretical analysis confirms that the 2ω component can be entirely eliminated from the system and a 2 kW prototype is built to verify the circuit analysis. Comparing to the conventional H-bridge converter, the ac capacitance can be reduced by 80 times.
KW - 120 Hz ripple power cancelation
KW - gallium nitride (GaN) devices
KW - multilevel inverter and multi-port switched capacitor circuit
UR - https://www.scopus.com/pages/publications/84963622301
U2 - 10.1109/WiPDA.2015.7369284
DO - 10.1109/WiPDA.2015.7369284
M3 - Conference contribution
AN - SCOPUS:84963622301
T3 - WiPDA 2015 - 3rd IEEE Workshop on Wide Bandgap Power Devices and Applications
SP - 312
EP - 318
BT - WiPDA 2015 - 3rd IEEE Workshop on Wide Bandgap Power Devices and Applications
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 3rd IEEE Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2015
Y2 - 2 November 2015 through 4 November 2015
ER -