Performance Analysis of Multilevel Converter with Reduced Number of Active Switches (original) (raw)
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Conventional & Reduced Switch Multilevel Inverter Topologies: A Survey
IJRT Online, 2018
— Multilevel converters have been evolving for a long time, however it is still under continuous development, and many new topologies have emerged in the recent researches. This paper presents a review of these recent contributions to ascertain the trends in this area so as to provide present standing of multilevel converter technology. Initially a brief overview of the established multilevel converters is presented and then the new promising topologies are discussed. While the classical topologies have proved to be an alternative, there has been an active interest in the evolution of newer topologies. Reduction in overall part count as compared to the conventional topologies has been an important objective in the recently introduced topologies. In this paper, some of the recently proposed multilevel inverter topologies with reduced power switches are reviewed. The comparison of the different topologies presented in this paper may help readers to seek an appropriate multilevel solution for a given application. Recent advances made in modulation and control of multilevel converters is also addressed. The paper emphasises on applications of multilevel converters in non conventional application areas. Finally, some future trends and challenges in the further development of this technology are discussed. Keywords: Multilevel Inverter (MLI), Cascaded Half bridge (CHB), Neutral point clamp (NPC), Flying Capacitor (FC).
A Novel Topology for Multilevel Inverter with Reduced Number of Switches
2013
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A New Topology of Single Phase Multi-Levelinverter with Less Number of Switches
Multilevel inverters have drawn tremendous interest in the power industry. It is easier to produce a high power, high voltage inverter with the multilevel structure because of the way in which device voltage stresses are controlled in the structure. Increasing the number of voltage levels in the inverter without requiring higher ratings on individual devices can increase the power rating with low harmonics. Conventional multilevel inverters, including diode-clamped, flying-capacitor, and cascaded H-bridge are well defined but become clumsy for higher levels. This paper proposes a new single phase full-bridge multilevel topology, which requires less split-rail dc sources and significantly reduced semiconductor switch devices.Cascading basic five-level cells provides another structure to build higher level inverters with separate dc sources. The proposed multilevel inverters can be potential for solar photovoltaic, energy storage applications and to run the single phase induction motor.
A new multilevel inverter with reduced switch count for renewable power applications
International Journal of Power Electronics and Drive System (IJPEDS), 2020
This paper proposes a new technique for a voltage source multilevel inverter (MLI) with reduced switch count, and it creates a smoother sinusoidal output waveform with reduced total harmonic distortion (THD). Therefore, the proposed technique identifies a better position in the list of multilevel converters used for power quality conditioners. Semiconducting devices are added to it if the number of levels increases. In this work, the topology of MLI with reduced number of switches is presented. A new MLI is proposed with lower number of switches and sources in order to achieve higher level. The proposed topology is framed out with the combination of three half bridge and a single H-bridge configuration. Detailed simulation results for 15-level inverter of single and three phase inverters are presented in this paper. Three phase 15-level inverter is developed by employing three isolated different renewable sources and 21 switches.
The Performance Multilevel Inverter 5 Level 1 Phase by Reducing Power Switch Components
JURNAL NASIONAL TEKNIK ELEKTRO, 2021
Multilevel Inverter (MLI) is a converter that converts DC power source into AC power source with voltage output more than 2 levels. The conventional 5-level Multilevel Inverter Topology that is developing today generally uses eight power switch components. In this paper, research Topology multilevel inverter 5 levels was conducted by reducing the power switch components into four pieces and assisted by two diode clamps and capacitor as voltage coupling. PWM (Pulse Width Modulation) technique used to utilize multicarrier modulation. Simulation testing with MATLAB conducted has been verified with the results of hardware tests where the output voltage shows similarity of shape at the output voltage MLI 5 levels. The results and discussion of the proposed topology can provide economic benefits from the use of the number of power switch components (MOSFET) compared to conventional 5-level MLI topology. Keywords : Multilevel Inverter, PWM, 5 Level
A Novel Multilevel Inverter Topology with Reduced Component count
International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, 2015
This paper presents a multilevel inverter that has been conceptualized to reduce component count, particularly for a large number of output levels. It comprises floating input dc sources alternately connected in opposite polarities with one another through power switches. Each input dc level appears in the stepped load voltage either individually or in additive combinations with other input levels. This approach results in reduced number of power switches as compared to classical topologies. The working principle of the proposed topology is demonstrated with the help of a single-phase five-level inverter. The topology is investigated through simulations and validated experimentally on a laboratory prototype. An exhaustive comparison of the proposed topology is made against the classical cascaded H-bridge topology.
A novel multilevel inverter with reduced switch count
International Journal of Advances in Applied Sciences (IJAAS), 2019
This paper presents a multilevel inverter with reduced number of switches to produce a five level output. PWM technique (pulse width modulation) has been used to trigger the MLI switches. It gives reduced harmonic. This proposed topology is connected with R-load and RL-load. Four signals are generated for switching on the multilevel inverter (MLI) switches by comparing four level triangular waveform with sine wave. In this proposed topology two switches are reduced from the conventional Cascaded five level inverter. The simulation analysis has been done by MATLAB/SIMULINK.
A Higher Voltage Multilevel Inverter with Reduced Number of Power Electronic Switches
Power electronic inverter become popular for various industrial drives applications. The multi-level inverter system is very promising in ac drives. Large electrical drives and utility application require advanced power electronics converter to meet the high power demands. As a result, multilevel power converter structure has been introduced as an alternative in high power and medium voltage situations. A multilevel converter not only achieves high power rating but also improves the performance of the whole system in terms of harmonics. The inverter output with more numbers of voltage levels with reduced number of switches as compared to cascade H-bridge inverter, which results in reduction of installation cost and have simplicity of control system. In this paper, a new configuration of a three-phase seven-level multilevel voltage source inverter is introduced. The proposed topology constitutes the conventional three-phase five-level bridge with three bidirectional switches. A multilevel dc link using fixed dc voltage supply and cascaded half-bridge is connected in such a way that the proposed inverter outputs the required output voltage levels. For the purpose of increasing the number of voltage levels with fewer number of power electronic components, the structure of the proposed inverter is extended and different methods to determine the magnitudes of utilized dc voltage supplies are suggested by using MAT Lab/Simulink.
A Multilevel Inverter Topology with Reduced Switches
IEEE, 2019
Due to unavailability, scarcity, and environmental effects of non-renewable conventional source it has become almost necessary to shift energy needs increasingly towards renewable sources. Renewable sources like solar and wind not only provide pollution free energy but are also freely available in vast amount. One on the most popular forms of renewable energy is the solar energy. Photovoltaic systems are used to convert the solar energy into electrical energy that can be stored in batteries. As batteries provide DC voltage inverters are needed to convert the Direct Current from batteries into Alternating Current because most of our everyday loads are AC in nature. This paper presents a new multi-level inverter topology for this purpose. Multi-level inverters are most suitable for medium to high power inverters. Multi-level inverters have advantage over square wave inverters and Quasi square wave inverters because they can produce AC voltages with low harmonic distortion, also smaller DC voltage sources can be used in a cascade form to produce high voltage AC output. The topology introduced in this paper is for a 5-level inverter. The benefit of this topology is that it uses fewer number of switches than conventional multi-level inverter typologies.
Recently multilevel inverters (MLIs) have gained lots of interest in industry and academia, as they are changing into a viable technology for numerous applications such as renewable power conversion system, drives, etc. For these high power and high/medium voltage applications, MLIs are widely used as one of the advanced power converter topologies. To produce high-quality output without the need for large number of switches, development of reduced switch MLI (RS MLI) topologies has been a major focus of current research. Therefore, this review article focuses on a number of recently developed MLIs used in various applications. To assist with advanced current research in this field and in selection of suitable inverter for various applications, significant understanding on these topologies is clearly summarized based on the three categories, i.e., symmetrical, asymmetrical, and modified topologies. This review work also includes a comparison based on important performance parameters, detailed technical challenges, current focus, and future development trends. By suitable combination of switches, the MLI produces a staircase output with low harmonic distortion. For better understanding of the working principle, a single-phase RS MLI topology is experimentally illustrated for different level generation using both fundamental and high switching frequency techniques which will help the readers to gain the utmost knowledge for advance research. INDEX TERMS Control techniques, drives application, fundamental switching frequency, high switching frequency, multilevel inverter (MLI), performance parameters, photovoltaic (PV) systems, reduced component count, renewable energy application.