scholarly journals A Single Source Switched-Capacitor 13-Level Inverter with Triple Voltage Boosting and Reduced Component Count

Electronics ◽  
2021 ◽  
Vol 10 (19) ◽  
pp. 2321
Author(s):  
Mohammad Tayyab ◽  
Adil Sarwar ◽  
Irfan Khan ◽  
Mohd Tariq ◽  
Md Reyaz Hussan ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Output Voltage ◽  
Multilevel Inverter ◽  
Switched Capacitor ◽  
Single Source ◽  
Level Control ◽  
Voltage Waveform ◽  
Voltage Level ◽  
Fundamental Cycle ◽  
Simulation Results

A new triple voltage boosting switched-capacitor multilevel inverter (SCMLI) is presented in this paper. It can produce 13-level output voltage waveform by utilizing 12 switches, three diodes, three capacitors, and one DC source. The capacitor voltages are self-balanced as all the three capacitors present in the circuit are connected across the DC source to charge it to the desired voltage level for several instants in one fundamental cycle. A detailed comparative analysis is carried to show the advantages of the proposed topology in terms of the number of switches, number of capacitors, number of sources, total standing voltage (TSV), and boosting of the converter with the recently published 13-level topologies. The nearest level control (NLC)-based algorithm is used for generating switching signals for the IGBTs present in the circuit. The TSV of the proposed converter is 22. Experimental results are obtained for different loading conditions by using a laboratory hardware prototype to validate the simulation results. The efficiency of the proposed inverter is 97.2% for a 200 watt load.

Comparison of Switching Angle Arrangement Techniques in Single-Phase Boost Multilevel Inverter for Low-THD Operation

2015 ◽  
Vol 793 ◽  
pp. 167-171
Author(s):  
Mohd Aizuddin Yusof ◽  
Yee Chyan Tan ◽  
M. Othman ◽  
S.S. Lee ◽  
M.A. Roslan ◽  
...  
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Solar Photovoltaic ◽  
Voltage Waveform ◽  
Voltage Level ◽  
Software Simulation ◽  
Multilevel Inverters ◽  
Simulation Results

Multilevel inverters are one of the preferred inverter choices for solar photovoltaic (PV) applications. While these inverters are capable of producing AC staircase output voltage waveform, the total harmonic distortion (THD) of the output voltage waveform can become worse if the switching angle of each voltage level is not carefully chosen. In this paper, four switching angle arrangement techniques are presented and the switching angles generated by these techniques are applied to a new single-phase boost multilevel (SPBM) inverter. The performance of 3-, 5-, 7-, 9-and 11-level SPBM inverter having four different sets of switching angles derived using the aforementioned techniques have been evaluated and compared using PSIM software. Simulation results show that one of the techniques is able to produce an output voltage waveform with the lowest THD, whilst the other generates an output voltage waveform with the highest fundamental voltage component.

scholarly journals Realization of a Generalized Switched-Capacitor Multilevel Inverter Topology with Less Switch Requirement

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1556 ◽  
Author(s):  
Anzar Ahmad ◽  
MU Anas ◽  
Adil Sarwar ◽  
Mohammad Zaid ◽  
Mohd Tariq ◽  
...  
Keyword(s):  
Output Voltage ◽  
Multilevel Inverter ◽  
Basic Unit ◽  
Modulation Scheme ◽  
Switched Capacitor ◽  
Level Control ◽  
Active Components ◽  
Proposed Model ◽  
Environment Simulation ◽  
The Cost

Conventional multilevel inverter topologies like neutral point clamped (NPC), flying capacitor (FC), and cascade H bridge (CHB) are employed in the industry but require a large number of switches and passive and active components for the generation of a higher number of voltage levels. Consequently, the cost and complexity of the inverter increases. In this work, the basic unit of a switched capacitor topology was generalized utilizing a cascaded H-bridge structure for realizing a switched-capacitor multilevel inverter (SCMLI). The proposed generalized MLI can generate a significant number of output voltage levels with a lower number of components. The operation of symmetric and asymmetric configurations was shown with 13 and 31 level output voltage generation, respectively. Self-capacitor voltage balancing and boosting capability are the key features of the proposed SCMLI structure. The nearest level control modulation scheme was employed for controlling and regulating the output voltage. Based on the longest discharging time, the optimum value of capacitance was also calculated. A generalized formula for the generation of higher voltage levels was also derived. The proposed model was simulated in the MATLAB®/Simulink 2016a environment. Simulation results were validated with the hardware implementation.

scholarly journals Generalized Structures for Switched-Capacitor Multilevel Inverter Topology for Energy Storage System Application

2021 ◽  
Vol 11 (3) ◽  
pp. 1319
Author(s):  
Mu Anas ◽  
Adil Sarwar ◽  
Anzar Ahmad ◽  
Afroz Alam ◽  
Shafiq Ahmad ◽  
...  
Keyword(s):  
Output Voltage ◽  
General Structure ◽  
Storage System ◽  
Harmonic Distortion ◽  
Low Frequency ◽  
Energy Storage System ◽  
Multilevel Inverter ◽  
Switched Capacitor ◽  
Voltage Waveform ◽  
Voltage Balancing

The apparent advantages of Multilevel Inverter (MLI) topologies in handling medium and high power with less loss in switching and lower harmonic distortion in an output voltage waveform makes it better than the conventional inverter. However, the MLI topologies utilize a large number of DC power supplies and power semiconductor devices. They also have a higher value of total standing voltage (TSV). Moreover, capacitor voltage balancing problems, self-voltage boosting inability, and complex control techniques require a relook and improvement in their structure. More recently, Switched-Capacitor Multilevel Inverter (SCMLI) topologies have been proposed to overcome the shortcomings of MLIs. In this paper, a generalized structure for a single-phase switched capacitor multilevel inverter (SCMLI) with self-voltage boosting and self-voltage balancing capability is proposed. A detailed analysis of a general structure of SCMLI is presented. The comparative analysis of the structures is carried out with recently reported topologies to demonstrate superiority. An optimized low-frequency modulation controls the output voltage waveform. The simulation and experimental results are included in the paper for single-unit symmetric (9-level voltage) and asymmetric (17-level voltage) configurations.

scholarly journals An Eleven-Level Switched-Capacitor Inverter with Boosting Capability

Electronics ◽  
2021 ◽  
Vol 10 (18) ◽  
pp. 2262
Author(s):  
Md Reyaz Hussan ◽  
Adil Sarwar ◽  
Irfan Khan ◽  
Mohd Tariq ◽  
Mohammad Tayyab ◽  
...  
Keyword(s):  
Output Voltage ◽  
Detailed Comparison ◽  
Input Voltage ◽  
Voltage Source ◽  
Switched Capacitor ◽  
Level Control ◽  
Voltage Waveform ◽  
Dc Voltage ◽  
Bidirectional Switches ◽  
State Of Art

An 11-level switched-capacitor multilevel inverter (SCMLI) with 2.5 times boosting feature is presented in this paper. It can produce an 11-level output voltage waveform by utilizing 14 switches, 3 capacitors, 2 diodes, and 1 DC source. Only nine driver circuits are needed as the topology has three pairs of complementary switches and two bidirectional switches. It has inherent capacitor self-balancing property as the capacitors are connected across the DC voltage source during several states within a fundamental cycle to charge the capacitors to the input voltage. A detailed comparison shows the effectiveness of the proposed topology in terms of the number of switches, number of capacitors, number of sources, total standing voltage (TSV), efficiency, and boosting ability with the state-of-art recently proposed circuits. Subsequently, the performance of the proposed SCMLI is validated experimentally utilizing the nearest level control (NLC), a fundamental frequency-based switching technique.

Performance Analysis of a Half Bridge Cell Based Asymmetrical Multilevel Inverter Topology with Minimum Components

2020 ◽  
Vol 13 (4) ◽  
pp. 531-545
Author(s):  
Abeera D. Roy ◽  
Chandrahasan Umayal
Keyword(s):  
Output Voltage ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Simulation Environment ◽  
Level Control ◽  
Voltage Waveform ◽  
Multilevel Inverters ◽  
Different Types ◽  
Performance Abilities ◽  
Inverter Topology

Background: In Multilevel Inverters (MLI) as the number of level increases, there is a proportionate increase in the count of the semiconductor devices that are employed. Methods: This paper deals with an asymmetrical cascaded H-bridge inverter topology with half bridge cells to produce seven level output voltage waveform. Nearest Level Control (NLM) technique is used to produce the switching pulses. The operating principle of the proposed MLI and its performance abilities is verified through MATLAB/Simulink and a prototype is developed to provide the experimental results. Results: Total Harmonic Distortion (THD) is computed for proposed MLI for different types of loads in simulation environment as well as in the developed hardware prototype. Comparison between the proposed MLI and recent topologies demonstrates the advantageous features. Conclusion: The simulation and hardware results confirm the suitability of the proposed seven level MLI as the total component count, and the requirement of DC sources reduces considerably.

scholarly journals Design and Implementation of a Hybrid Single T-Type Double H-Bridge Multilevel Inverter (STDH-MLI) Topology

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1810 ◽  
Author(s):  
Muhyaddin Rawa ◽  
Marif Daula Siddique ◽  
Saad Mekhilef ◽  
Noraisyah Mohamed Shah ◽  
Hussain Bassi ◽  
...  
Keyword(s):  
Output Voltage ◽  
Detailed Comparison ◽  
Multilevel Inverter ◽  
Basic Unit ◽  
Lower Amount ◽  
Level Control ◽  
Voltage Waveform ◽  
High Quality ◽  
Dc Voltage ◽  
Inverter Topology

Multilevel inverters are proficient in achieving a high-quality staircase output voltage waveform with a lower amount of harmonic content. In this paper, a new hybrid multilevel inverter topology based on the T-type and H-bridge module is presented. The proposed topology aims to achieve a higher number of levels utilizing a lower number of switches, direct current (dc) voltage sources, and voltage stresses across different switches. The basic unit of the proposed single T-type and double H-bridge multilevel inverter (STDH-MLI) produces 15 levels at the output using three dc voltage sources. The proposed topology can be extended by connecting a larger number of dc voltage sources in the T-type section. The nearest level control (NLC) switching technique is used to generate gate pulses for switches to achieve a high-quality output voltage waveform. In addition, a simplified way to achieve NLC is also described in the paper. A detailed comparison with other similar topologies is provided to set the benchmark of the proposed topology. Finally, experimental work is carried out to validate the performance of the proposed topology.

scholarly journals Design and Validation of a Reduced Switching Components Step-Up Multilevel Inverter (RSCS-MLI)

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1948
Author(s):  
Mohammad Wasiq ◽  
Adil Sarwar ◽  
Zeeshan Sarwer ◽  
Mohd Tariq ◽  
Shafiq Ahmad ◽  
...  
Keyword(s):  
Power Loss ◽  
Output Voltage ◽  
Hardware Implementation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Level Control ◽  
Loss Analysis ◽  
Simulation Results ◽  
Insight Into ◽  
Load Conditions

A reduced switching components step-up multilevel inverter (RSCS-MLI) is presented in the paper. The basic circuit of the proposed MLI can produce 11 levels in the output voltage with a reduced number of switching components. The other features of the proposed circuit include a low value of voltage stresses and the inherent generation of the voltage levels pertaining to the negative half without the requirement of an H-bridge. Fundamental frequency switching technique, also known as Nearest Level Control (NLC) technique, is implemented in the proposed topology for generating the switching signals. The experimental total harmonic distortion (THD) in the output voltage comes out to be 9.4% for modulation index equal to 1. Based on different parameters, a comparative study has been shown in the paper, which makes the claim of the proposed MLI stronger. An experimental setup is prepared to carry out the hardware implementation of the proposed structure and monitor its performance under dynamic load conditions, which is also used to verify the simulation results. Power loss analysis, carried out by using PLECS software, helps us to gain insight into different losses occurring while operating the inverter. The different results are explained and analyzed in the paper.

scholarly journals A New Seven Level Symmetrical Inverter with Reduced Switch Count

2018 ◽  
Vol 9 (2) ◽  
pp. 921
Author(s):  
Thiyagarajan V. ◽  
Somasundaram P.
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Multilevel Inverter ◽  
Voltage Waveform ◽  
Multilevel Inverters ◽  
Minimum Number ◽  
Simulation Results ◽  
Electro Magnetic ◽  
Commercial Applications ◽  
The Cost

<span>Multilevel inverters offers less distortion and less electro-magnetic interference compared with other conventional inverters and hence, it can be used in many industrial and commercial applications.  This paper analyze the performance of the modified single phase seven level symmetrical inverter using minimum number of switches. The proposed topology consists of six switches and two dc sources, and produces seven level output voltage waveform during symmetric operation. The cost and size of the propsoed inverter minimum as it uses minimum number of components, The performance of the proposed multilevel inverter is analysed for different switching angles and the corresponding simulation results are presented. The simulation of the proposed inverter is carried out using MATLAB/Simulink software.</span>

Asymmetric cascade multilevel inverter with self-balanced switched-capacitor unit and single source

2020 ◽  
Vol 13 (15) ◽  
pp. 3254-3262
Author(s):  
Yuanmao Ye ◽  
Mingliang Lin ◽  
Xiaolin Wang
Keyword(s):  
Multilevel Inverter ◽  
Switched Capacitor ◽  
Single Source

scholarly journals A Single-Source Switched-Capacitor Based Step-Up Multilevel Inverter with Reduced Components

2021 ◽  
pp. 1-1
Author(s):  
Kaibalya Prasad Panda ◽  
Prabhat Ranjan Bana ◽  
Oleh Kiselychnyk ◽  
Jihong Wang ◽  
Gayadhar Panda
Keyword(s):  
Multilevel Inverter ◽  
Switched Capacitor ◽  
Single Source
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