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A CONTRIBUTION TO THE PROBLEM OF NEUTRAL-POINT VOLTAGE BALANCING IN THREE LEVEL NPC INVERTER

This paper presents a control method for balancing the capacitor voltage of three-level
neutral-point-clamped converters (NPC). This control method overcomes one of the main
problems of this converter, which is the low frequency voltage oscillation that appears in the
neutral point. The algorithm is based on a carrier-based PWM. Studying a offset voltage to have optimal results in relation to power factor and modulation index is a matter of concern...

Từ khóa: neutral point clamped converter, offset, modulation index, balancing time, THD

7 p ovanketv4 14/06/2017 328 1

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