Single‐phase Modified T‐type–based multilevel inverter with reduced number of power electronic devices

Abstract

Summary In this research work, a generalized structure of multilevel topology is proposed that can be extended by cascading the modules. Proposed modular topology is modified T‐type structure that requires comparative reduced number of power components than other existing structures of multilevel inverter. Each module encompasses of three DC sources and 10 power switches. Both positive and negative voltage levels can be generated without the use of H‐bridge inverter; thus, lower voltage rating power switches are employed for proposed modular topology. To generate the output voltage levels, the nearest level control is implemented on the experimental setup using dSPACE 1103 controller. To verify the performance of the proposed inverter, experimental validation of various topologies based on different algorithms is performed to generate 15‐level, 17‐level, 27‐level, and 31‐level at different load conditions. Moreover, different state‐of‐art topologies are compared with proposed topology in terms of the required number of voltage levels, DC sources, power switches, driver circuits, and total standing voltage.

A New Configurable Topology for Multilevel Inverter With Reduced Switching Components

“…s(7 ) cos(7 ) 0 cos(9 ) cos(9 ) cos(9 ) cos(9 ) cos(9 ) cos(9 ) 0 cos(11 ) cos(11 ) cos(11 ) cos(11 ) cos (11 )…”

“…In the symmetrical configuration, topology uses lower count of power electronic devices for the same output levels as compared to NPC and CHB. Likewise, some other symmetrical topologies have been discussed in [11]- [15].…”

A novel cross-connected multilevel inverter topology for higher number of voltage levels with reduced switch count

“…In this article, the non‐isolated DC source is used and all the switches are bidirectional switches, which are more suitable for high RB‐IGBT, but the number of IGBTs count is doubled. Other topologies are proposed with a reduction of DC sources and switches.…”

“…Even though, this topology produce possible voltage level, it does not have inherent capability of staircase waveform generation and it require series connection of H‐bridge circuit whereas H‐bridge switches withstand high voltage compare to other inverter switches. In Reference , a modified structure of T‐type topology is presented for positive and negative voltage output level generation without any H‐bridge circuit. However, this topology requires number asymmetric DC sources and higher blocking voltage on the switches.…”

Design and implementation of a novel asymmetrical multilevel inverter optimal hardware components

“…Also, finding their appropriate use in renewable energy systems, which include smart and micro‐grids. There is always a scope of improvement of efficiency and reduction in the harmonic distortion has always become a concern for the researchers …”