Various harmonic characteristics of SVC using NPC-PWM inverter

An NPC-inverter has significant advantages over other types of inverter, such as the ability to drive a motor with a nearly sinusoidal current waveform, and at higher output voltages. Consequently, the consideration of practical applications for this type of inverter is of increasing interest. These applications include larger capacity inverters, where using an NPC-inverter is particularly beneficial. These are being put into practical use in areas such as large AC motor drives, SVCs (static VAr compensators) and the like. In this paper we discuss the harmonic characteristics in applications where the NPC-inverter is used with an SVC