Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 34, Issue 11, Pages 10619-10634Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2019.2900618
Keywords
AC-DC power conversion; power distribution faults; protection; pulsewidth modulated power converters
Categories
Funding
- Engineering and Physical Sciences Research Council [EP/N034570/1]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2018R1D1A1B07044999]
- EPSRC [EP/N034570/1] Funding Source: UKRI
- National Research Foundation of Korea [2018R1D1A1B07044999] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A pulsewidth-modulation bidirectional ac-dc converter (i.e., active rectifier) with dc-fault-blocking and self-precharge 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 de 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 de 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.
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