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Dive into the research topics where Raghavendra Reddy Karasani is active.

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Featured researches published by Raghavendra Reddy Karasani.


IEEE Transactions on Power Electronics | 2017

A Three-Phase Hybrid Cascaded Modular Multilevel Inverter for Renewable Energy Environment

Raghavendra Reddy Karasani; Vijay B. Borghate; Prafullachandra M. Meshram; Hiralal M. Suryawanshi; Sidharth Sabyasachi

This paper presents a three-phase hybrid cascaded modular multilevel inverter topology which is derived from the proposed modified H-bridge module. This topology results in the reduction of number of power switches, losses, installation area, voltage stress and converter cost. For renewable energy environment such as photovoltaic (PV) connected to the microgrid system, it enables the tranformerless operation and enhances the power quality. This multilevel inverter is an effective and efficient power electronic interface strategy for renewable energy systems. The basic operation of single module and the proposed cascaded hybrid topology is explained. The ability to operate in both symmetrical and asymmetrical modes is analyzed. The comparative analysis is done with classical cascaded H-bridge and flying capacitor multilevel inverters. The nearest level control method is employed to generate the gating signals for the power semiconductor switches. To verify the applicability and performance of the proposed structure in PV renewable energy environment, simulation results are carried out by MATLAB/Simulink under both steady-state and dynamic conditions. Experimental results are presented to validate the simulation results.


Journal of Power Electronics | 2016

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

Raghavendra Reddy Karasani; Vijay B. Borghate; Prafullachandra M. Meshram; Hiralal M. Suryawanshi

In this paper, a single phase modified switched-diode topology for both symmetrical and asymmetrical cascaded multilevel inverters is presented. It consists of a Modified Switched-Diode Unit (MSDU) and a Twin Source Two Switch Unit (TSTSU) to produce distinct positive voltage levels according to the operating modes. An additional H-bridge synthesizes a voltage waveform, where the voltage levels of either polarity have less Total Harmonic Distortion (THD). Higher-level inverters can be built by cascading MSDUs. A comparative analysis is done with other topologies. The proposed topology results in reductions in the number of power switches, losses, installation area, voltage stress and converter cost. The Nearest Level Control (NLC) technique is employed to generate the gating signals for the power switches. To verify the performance of the proposed structure, simulation results are carried out by a PSIM under both steady state and dynamic conditions. Experimental results are presented to validate the simulation results.


Electric Power Components and Systems | 2017

Cascaded Multi-level Inverter Topology Developed from a Modified H-bridge

Raghavendra Reddy Karasani; Vijay B. Borghate; Sidharth Sabyasachi; Hiralal M. Suryawanshi; Prafullachandra M. Meshram

Abstract In this paper, a single-phase cascaded multi-level inverter topology is proposed. It is basically developed from a modified H-bridge module. This topology reduces the switch count, the gate drive requirement, and voltage stress. The significant advantages of the proposed inverter are modular structure, simpler control, and lower number of switches. The Nearest Level Control algorithm is employed to generate the gating signals for the power switches. To verify the performance of the proposed structure, simulation results are carried out by MATLAB (The MathWorks, Natick, Massachusetts, USA)/SIMULINK. Experimental results are presented to validate the simulation results.


Arabian Journal for Science and Engineering | 2018

A Modified Space Vector PWM Approach for Nine-Level Cascaded H-Bridge Inverter

Hemanth Kumar Busireddy; Makarand M. Lokhande; Raghavendra Reddy Karasani; Vijay B. Borghate


International Journal of Circuit Theory and Applications | 2018

A fault-tolerant modular multilevel inverter topology

Santosh Kumar Maddugari; Vijay B. Borghate; Raghavendra Reddy Karasani; Sidharth Sabyasachi; Hiralal M. Suryawanshi


Arabian Journal for Science and Engineering | 2018

A Three-phase Nine-level Fault Tolerant Asymmetrical Inverter

Santosh Kumar Maddugari; Vijay B. Borghate; Raghavendra Reddy Karasani; Sidharth Sabyasachi; Hiralal M. Suryawanshi


ieee region 10 conference | 2017

A reliable multilevel inverter with fault tolerance

Sidharth Sabyasachi; Vijay B. Borghate; Santosh Kumar Maddugari; Raghavendra Reddy Karasani


IEEE Access | 2017

Hybrid Control Technique-Based Three-Phase Cascaded Multilevel Inverter Topology

Sidharth Sabyasachi; Vijay B. Borghate; Raghavendra Reddy Karasani; Santosh Kumar Maddugari; Hiralal M. Suryawanshi


2017 National Power Electronics Conference (NPEC) | 2017

A single phase hybrid multilevel inverter developed from half bridge cells

Sidharth Sabyasachi; Vijay B. Borghate; Santosh Kumar Maddugari; Raghavendra Reddy Karasani


2017 National Power Electronics Conference (NPEC) | 2017

A modified three phase 5-level symmetrical multilevel inverter topology

Raghavendra Reddy Karasani; Sidharth Sabyasachi; Vijay B. Borghate; Santosh Kumar Maddugari

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Vijay B. Borghate

Visvesvaraya National Institute of Technology

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Sidharth Sabyasachi

Visvesvaraya National Institute of Technology

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Santosh Kumar Maddugari

Visvesvaraya National Institute of Technology

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Hiralal M. Suryawanshi

Visvesvaraya National Institute of Technology

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Prafullachandra M. Meshram

Yeshwantrao Chavan College of Engineering

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Hemanth Kumar Busireddy

Visvesvaraya National Institute of Technology

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Makarand M. Lokhande

Visvesvaraya National Institute of Technology

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