TY - JOUR
T1 - Removal of Instantaneous Reactive Power from High-Conversion-Ratio Bidirectional Resonant Converter with Balanced Capacitor Voltage
AU - Son, Sungho
AU - Seok, Hwasoo
AU - Kim, Minsung
N1 - Publisher Copyright:
© 1986-2012 IEEE.
PY - 2020/11
Y1 - 2020/11
N2 - This article presents bidirectional operation of a resonant converter that features high step-up/down capability, high efficiency, and balanced capacitor voltage. When transferring power in the backward direction, the original converter may suffer from significant reverse current due to large fluctuation of the resonant capacitor voltage. By applying the right amount of phase in the pulsewidth-modulation signal, we can remove the instantaneous reactive power generated during the backward operation. We first derive the nominal duty ratio of the secondary side in terms of the backward voltage gain, then derive the threshold load level, above which the instantaneous reactive power appears, and compute the required amount of phase shift to remove it. We also analyze the sensitivity of the required amount of phase with regard to resonant tank parameters. A 400-W prototype converter has been built to demonstrate the performance of the proposed converter.
AB - This article presents bidirectional operation of a resonant converter that features high step-up/down capability, high efficiency, and balanced capacitor voltage. When transferring power in the backward direction, the original converter may suffer from significant reverse current due to large fluctuation of the resonant capacitor voltage. By applying the right amount of phase in the pulsewidth-modulation signal, we can remove the instantaneous reactive power generated during the backward operation. We first derive the nominal duty ratio of the secondary side in terms of the backward voltage gain, then derive the threshold load level, above which the instantaneous reactive power appears, and compute the required amount of phase shift to remove it. We also analyze the sensitivity of the required amount of phase with regard to resonant tank parameters. A 400-W prototype converter has been built to demonstrate the performance of the proposed converter.
KW - Bidirectional operation
KW - capacitor voltage balancing
KW - duality
KW - energy storage system (ESS)
KW - high step-up/down
KW - instantaneous reactive power
KW - phase adjustment
UR - http://www.scopus.com/inward/record.url?scp=85089305031&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2020.2982969
DO - 10.1109/TPEL.2020.2982969
M3 - Article
AN - SCOPUS:85089305031
SN - 0885-8993
VL - 35
SP - 11916
EP - 11929
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 11
M1 - 9050484
ER -