Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power mediumvoltage energy control. This paper presents the most important topologies like diode-clamped inverter (neutral-point clamped), capacitor-clamped (flying capacitor), and cascaded multicell with separate dc sources. Emerging topologies like asymmetric hybrid cells and soft-switched ...

<span lang="EN-US">This paper provides a new approach to reducing high-order harmonics in 400 Hz inverter using three-level neutral-point clamped (NPC) converter. A voltage control loop the harmonic compensation combined with NPC clamping diode technology. The capacitor imbalance also causes output voltage. For inverter, maintain balanced between two input (direct current) (DC) capacitors...

The Neutral Point Clamped (NPC) three-level inverter with Z-source network is a relatively recent converter topology that exhibits both voltage-buck and voltage-boost capability. This concept can be applied to all acto-ac, dc-to-dc, ac-to-dc, and dc-to-ac power conversion whether two-level or multilevel. However, multilevel inverters offer many benefits for higher power applications. Existing p...

This paper presents a comprehensive review on three basic types of multilevel inverters i.e., diode-clamped, flying-capacitor, and cascaded H-bridge multilevel inverter and their variation for photovoltaic power system. The electrical power generated form photovoltaic power system is in DC form. Hence, it is necessary to be controlled and converted to useful form. Inverter is a power electronic...

A new operational mode for diode clamped multilevel inverters (DCMLI) based on 5-level operation is proposed. This operational mode is based on a new technique called sinusoidal pulse width modulation (SPWM). Such operation aims to avoid the imbalance problem of the DC-link capacitors for multilevel inverters with more than 3-levels. This scheme reduces the DC-link capacitance without introduci...

This paper presents the modeling, the detailed simulation and the test of an efficient medium voltage adjustable speed drive. The system consists on a three-level Neutral-Point Clamped (NPC) inverter supplied by a 12-pulse rectifier. To achieve a motor-friendly supply, an LC filter is inserted between inverter output terminals and induction motor terminals. A Direct Torque Control (DTC) tunes t...

Shunt active power filter is commonly used to eliminate current harmonics generated in the source side due to presence of non-linear loads. This scheme consists of three phase three level diode clamped multilevel inverter and a DC capacitor that act as a shunt active power filter to mitigate the supply current harmonics and inject the required reactive power to non-linear loads. In this paper, ...