DIFFERENT OPEN-SWITCHES FAULTS AUTOMATIC DETECTION AND LOCATION IN TWO LEVEL THREE PHASE VOLTAGE INVERTER
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Published
Feb 3, 2007
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Abstract
The faulty performance of two level three phase voltage inverter is studied under one and two simultaneous open-switches conditions. This inverter is three phase two
level six IGBT voltage source inverter feeding a three phase balanced resistive-inductive load. The inverter three phases
currents zero harmonic components and their harmonic distortion rate are used as diagnostic indices. A knowledge algorithm is based to get information on which IGBT is in
open-switch fault condition. This algorithm testing shows that the system could not only detect the open-switch fault, but
also identify the faulty switches. Presented simulation results confirm the effectiveness of the proposed methodology.
level six IGBT voltage source inverter feeding a three phase balanced resistive-inductive load. The inverter three phases
currents zero harmonic components and their harmonic distortion rate are used as diagnostic indices. A knowledge algorithm is based to get information on which IGBT is in
open-switch fault condition. This algorithm testing shows that the system could not only detect the open-switch fault, but
also identify the faulty switches. Presented simulation results confirm the effectiveness of the proposed methodology.