This paper presents the hybrid seven-level cascaded active neutral-point-clamped (ANPC)-based multilevel converter. The converter topology is the cascaded connection of a three-level ANPC converter and an H-bridge per phase. The proposed topology provides a tradeoff between different component counts to achieve a good loss distribution, avoid direct series connection of semiconductor devices, k...

This paper presents a power electronic interface converter based on asymmetric Γ-Source Inverter for photovoltaic application. The average state space model of the system is used for modeling of the proposed converter system. According to the obtained model of system, a two stage controller is designed to regulate the capacitor voltage of the impedance network to its required voltage and regula...

MODULARIZED MULTILEVEL AND Z-SOURCE POWER CONVERTER AS RENEWABLE ENERGY INTERFACE FOR VEHICLE AND GRID-CONNECTED APPLICATIONS By Dong Cao Due the energy crisis and increased oil price, renewable energy sources such as photovoltaic panel, wind turbine, or thermoelectric generation module, are used more and more widely for vehicle and grid-connected applications. However, the output of these rene...

In the viewpoint of reliability implication and cost effectiveness of three phase inverter, there should be less device count in inverter topology and fewer losses in the semiconductor switches. The earlier reported less device count topology by many research groups are facing the problem of Total Harmonic Distortion (THD). The imperfect design value of DC link capacitor is the main reason of H...

In all multilevel topology with several DC link, the voltage balancing problem of DC capacitors is a key problem. This paper proposes a new topology of chopper circuit for dc capacitor voltage balancing in diode clamped multilevel inverters (DCMLI). In the presented topology the number of switches is reduced respect to other proposed topology in literatures. Suggested topology is modular and ha...

Modeling of Cascaded Multilevel converter has put more emphasize on conventional cascaded Hbridge inverter. First a new phase shifted SPWM control algorithm for cascaded NPC/H-bridge inverter is proposed. Its Superior harmonic suppression is verified by comparing its harmonic spectrum with that of the conventional multicarrier approach. For DCbus capacitor voltage control, a new, balance circui...

Open-end winding motors are used extensively in ship electric propulsion systems, which medium-voltage high-power inverters a critical component. To increase the system voltage and power density, dual five-level active neutral-point clamped (ANPC) inverter is proposed herein to drive open-end for propulsion. Each phase of this comprises two ANPC bridges all phases powered by common direct-curre...

Multilevel inverters are used in high power and medium voltage applications. Employing multilevel inverter with renewable energy alone, the voltage balance cannot be made because the number of level increases in multilevel inverter the control gets complexity. So voltage imbalance problems are introduced. The voltage imbalance problems can be classified into two types; Midpoint unbalance and th...

Abstract— Use of multilevel inverters has become popular in recent years for high power applications and an effective and practical solution for increasing power and reducing harmonics of AC waveforms. By synthesizing the AC output voltage from several levels of DC voltages, stair case output waveform can be produced. This allows for high output voltage and simultaneously lowers the stress on t...