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In this paper, a novel technique to balance the voltage of the two split dc capacitors of a 3-Level Neutral-Point-Clamped inverter using triangular carrier PWM modulation is presented. This technique, suitable for reactive power compensation and for inverters operating with a relatively low switching frequency, consists in adding a square wave at six times(More)
—This paper presents a novel large-power voltage source converter (VSC) arrangement suitable for flexible alternating current transmission system applications, achieved by combining four three-level three-phase neutral-point-clamped inverters by means of intermediate magnetic elements with lower VA rating and size than those of similar existing(More)
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