Fault Analysis and Clearance in FL-APC DC-AC Converter

• Published in: Canadian journal of electrical and computer engineering Vol. 46; no. 1; pp. 1 - 6
• Main Authors: Suresh, K., Parimalasundar, E.
• Format: Journal Article
• Language: English
• Published: Montreal IEEE 01.01.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Capacitors; Circuit faults; Circuits; Clamping; Clearances; Common-mode voltage with high frequency (CMV-HF); Convertibility; Design; Electric power; Energy efficiency; fault analysis; fault clearance; five-level active neutral-point-clamped (FL-APC) dc-ac converter; Stress; Switches; Topology; Voltage; Voltage control; Voltage gain
• ISSN: 2694-1783; 0840-8688; 2694-1783
• DOI: 10.1109/ICJECE.2022.3220090

The traditional active neutral-point-clamped (APC) dc-ac converter maintains great common-mode voltage with high-frequency (CMV-HF) reduction capability, so it has limited voltage gain. This article presents a new five-level APC (FL-APC) dc-ac converter capable of voltage step-up in a single-stage inversion. In the suggested design, a common ground not only reduces the CMV-HF but also improves dc-link voltage usage. While comparing with traditional two-stage FL-APC dc-ac converter, the proposed design has lower voltage stresses and greater uniformity. While improving overall efficiency, the suggested clamped dc-ac converter saves three power switches and a capacitor. Modeling and actual tests have proven the suggested APC inverter's overall operation, efficacy, and achievability. The proposed circuit is finally tested with fault clearance capability.