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When the converter level count gets higher, the space-vector pulse-width modulation (PWM) will suffer from the calculation burden for synthesising the voltage vectors and the redundant vector selection, which can be overcome by using the carrier-based PWM, as long as the carrier signal and modulation signal can be properly selected. This study proposes a new carrier-based PWM method to achieve some...
This paper presents the detection and protection methods uniquely associated with three-level NPC voltage source converters. The line-to-ground fault can cause significant DC-link neutral voltage and therefore can be effectively detected and located through monitoring the voltage without extra hardware. The inner device short in the three-level phase-leg can lead to DC- link voltage unbalance and...
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