TY - GEN
T1 - Open-circuit fault diagnosis for a grid-connected NPC inverter with unity Power Factor
AU - Choi, Ui Min
AU - Blaabjerg, Frede
AU - Lee, June Seok
AU - Lee, Kyo Beum
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/5/8
Y1 - 2015/5/8
N2 - This paper presents an open-circuit fault detection method for a grid-connected Neutral-Point Clamped (NPC) inverter. The open-circuit fault mainly occurs due to bonding wire failures like lift-off and crack in the power module where the thermal stress is major factor among the stresses that can lead to bond-wire failures. Under the grid-connected condition, it is impossible to identify the location of faulty switch by the conventional methods, which usually use the output currents as it has the same distortions in several fault cases. The clamping diode is also one of fragile component in the NPC inverter, but usually it is not considered. The proposed method identifies precisely the faulty location of switch and clamping diode without any additional hardware or complex calculations. The feasibility of the proposed fault detection method for the grid-connected NPC inverter is verified by simulations and experimental results.
AB - This paper presents an open-circuit fault detection method for a grid-connected Neutral-Point Clamped (NPC) inverter. The open-circuit fault mainly occurs due to bonding wire failures like lift-off and crack in the power module where the thermal stress is major factor among the stresses that can lead to bond-wire failures. Under the grid-connected condition, it is impossible to identify the location of faulty switch by the conventional methods, which usually use the output currents as it has the same distortions in several fault cases. The clamping diode is also one of fragile component in the NPC inverter, but usually it is not considered. The proposed method identifies precisely the faulty location of switch and clamping diode without any additional hardware or complex calculations. The feasibility of the proposed fault detection method for the grid-connected NPC inverter is verified by simulations and experimental results.
UR - http://www.scopus.com/inward/record.url?scp=84937910373&partnerID=8YFLogxK
U2 - 10.1109/APEC.2015.7104354
DO - 10.1109/APEC.2015.7104354
M3 - Conference contribution
AN - SCOPUS:84937910373
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 213
EP - 220
BT - APEC 2015 - 30th Annual IEEE Applied Power Electronics Conference and Exposition
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 30th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2015
Y2 - 15 March 2015 through 19 March 2015
ER -