TY - JOUR
T1 - H5+ Converter
T2 - A Bidirectional AC-DC Converter with DC-Fault-Blocking and Self-Pre-Charge Capabilities
AU - Wang, Ye
AU - Li, Yitong
AU - Junyent-Ferre, Adria
AU - Kim, Minsung
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/11
Y1 - 2019/11
N2 - A pulsewidth-modulation bidirectional ac-dc converter (i.e., active rectifier) with dc-fault-blocking and self-pre-charge capabilities is proposed in this paper for low voltage dc (LVdc) applications. The proposed converter, which is named as 'H5 + converter,' consists of an H4 bridge, a bidirectional switch, and a transient-voltage-surge (TVS) diode. The bidirectional switch and the TVS diode enable the dc fault blocking and dc bus self-pre-charge, while preserving the low common-mode voltage noise and low leakage current of the converter. Additionally, the proposed H5+ converter has advanced features under a dc-side short-circuit fault, such as fault diagnosis and fault recovery. Operation principles of the proposed converter are presented and analyzed. A down-scaled prototype is built. Experiment results are shown and analyzed, including steady-state waveforms, common-mode performance, start-up dynamics, as well as dc fault blocking, fault diagnosis, and fault recovery. Moreover, the proposed converter is compared with other two dc-fault-blocking converters for LVdc applications, in terms of converter capabilities, required devices, and power switch losses.
AB - A pulsewidth-modulation bidirectional ac-dc converter (i.e., active rectifier) with dc-fault-blocking and self-pre-charge capabilities is proposed in this paper for low voltage dc (LVdc) applications. The proposed converter, which is named as 'H5 + converter,' consists of an H4 bridge, a bidirectional switch, and a transient-voltage-surge (TVS) diode. The bidirectional switch and the TVS diode enable the dc fault blocking and dc bus self-pre-charge, while preserving the low common-mode voltage noise and low leakage current of the converter. Additionally, the proposed H5+ converter has advanced features under a dc-side short-circuit fault, such as fault diagnosis and fault recovery. Operation principles of the proposed converter are presented and analyzed. A down-scaled prototype is built. Experiment results are shown and analyzed, including steady-state waveforms, common-mode performance, start-up dynamics, as well as dc fault blocking, fault diagnosis, and fault recovery. Moreover, the proposed converter is compared with other two dc-fault-blocking converters for LVdc applications, in terms of converter capabilities, required devices, and power switch losses.
KW - AC-DC power conversion
KW - power distribution faults
KW - protection
KW - pulsewidth modulated power converters
UR - http://www.scopus.com/inward/record.url?scp=85072111321&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2019.2900618
DO - 10.1109/TPEL.2019.2900618
M3 - Article
AN - SCOPUS:85072111321
SN - 0885-8993
VL - 34
SP - 10619
EP - 10634
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 11
M1 - 8645677
ER -