Cascading of Diode Clamped Multilevel Inverter Boosters for High Voltage Applications

2013 ◽  
Vol 313-314 ◽  
pp. 876-881
Author(s):  
M.R. Rashmi ◽  
B. Anu
Keyword(s):  
High Voltage ◽  
Power Converters ◽  
Photovoltaic Cells ◽  
Multilevel Inverter ◽  
Power Conditioning ◽  
Dc Voltage ◽  
Multilevel Inverters ◽  
Energy Demands ◽  
Simulation Results ◽  
Cascaded Multilevel Inverter

Nonconventional energy sources are playing important role in meeting current power/energy demands. However these sources cannot provide High voltage/power. For power conditioning and voltage amplification solid state power converters are very much essential. One such approach to obtain high voltage was to use cascaded multilevel inverter but cascaded multilevel inverters require separate DC sources and they cannot be used for regenerative applications. To overcome these limitations, a novel configuration is using diode clamped multilevel inverter is proposed here. . The conditioned DC voltage from photovoltaic cells or fuel cells or batteries is boosted and inverted by means of multistage Multilevel Inverters (MLI). Three different configurations are presented in this paper. From the simulation results of all three configurations, the topology which is found to be better is implemented in the real time. A proto type is developed to boost 40 V input DC to 100 V AC and the experimental results for the same are presented.

scholarly journals Switched Capacitor Based Cascaded Half-Bridge Multilevel Inverter With Voltage Boosting Feature

2021 ◽  
Vol 6 (1) ◽  
pp. 63-73
Author(s):  
Hossein Khoun-Jahan ◽  
Keyword(s):  
Multilevel Inverter ◽  
Inrush Current ◽  
Switched Capacitor ◽  
Multilevel Inverters ◽  
Main Drawback ◽  
Front End ◽  
Simulation Results ◽  
Resonant Capacitor ◽  
Cascaded Multilevel Inverter ◽  
Inverter Topology

Cascaded multilevel inverter (CMI) topology is prevalent in many applications. However, the CMI requires many switches and isolated dc sources, which is the main drawback of this type of inverter. As a result, the volume, cost and complexity of the CMI topology are increased and the efficiency is deteriorated. This paper thus proposes a switched-capacitor-based multilevel inverter topology with half-bridge cells and only one dc source. Compared to the conventional CMI, the proposed inverter uses almost half the number of switches, while maintaining a boosting capability. Additionally, the main drawback of switched-capacitor multilevel inverters is the capacitor inrush current. This problem is also averted in the proposed topology by using a charging inductor or quasi-resonant capacitor charging with a front-end boost converter. Simulation results and lab-scale experimental verifications are provided to validate the feasibility and viability of the proposed inverter topology.

scholarly journals NEW ASYMMETRIC 21-LEVEL INVERTER WITH REDUCED NUMBER OF SWITCHES

2019 ◽  
Vol 16 (1) ◽  
pp. 18 ◽  
Author(s):  
Thiyagarajan V ◽  
Somasundaran P
Keyword(s):  
Power Electronics ◽  
High Voltage ◽  
High Power ◽  
Output Voltage ◽  
Multilevel Inverter ◽  
Matlab Simulink ◽  
Dc Voltage ◽  
Simulation Results ◽  
Commercial Applications ◽  
Inverter Topology

Multilevel inverter plays an important role in the field of modern power electronics and is widely being used for many high voltage and high power industrial and commercial applications. The objective of this paper is to design and simulate the modified asymmetric multilevel inverter topology with reduced number of switches. The proposed inverter topology synthesizes 21-level output voltage during symmetric operation using three DC voltage sources and twelve switches 8 main switches and 4 auxiliary switches. The different methods of calculating the switching angles are presented in this paper. The MATLAB/Simulink software is used to simulate the proposed inverter. The performance of the proposed inverter is analyzed and the corresponding simulation results are presented in this paper.

Multilevel Inverter for Hybrid Energy Generation System

2014 ◽  
Vol 622 ◽  
pp. 127-131
Author(s):  
Vasudevan Karthikeyan ◽  
Venkatesan Jamuna ◽  
Abisha James
Keyword(s):  
High Voltage ◽  
Electromagnetic Interference ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Generation System ◽  
Hybrid Generation ◽  
Hybrid Energy ◽  
Multilevel Inverters ◽  
Simulation Results ◽  
Inverter Circuit

Applications of multilevel inverters have been widely accepted for high-power and high-voltage industry purposes. Their performance is very much superior to that of traditional two-level inverters due to reduced harmonic distortion and lower electromagnetic interference. In this paper a multilevel inverter circuit with reduced number of switches and symmetric voltage sources has been designed for hybrid generation system. The switching angles for various levels of the output are obtained by using the simple sine property. Finally, the 11-level inverter model is built using Matlab/ Simulink to validate this topology. The simulation results are presented.

scholarly journals Hardware Implementation of 15-Level Cascaded Multilevel Inverter using Pic16f877a

2019 ◽  
Vol 9 (2) ◽  
pp. 4454-4457
Keyword(s):  
Hardware Implementation ◽  
Multilevel Inverter ◽  
Voltage Level ◽  
Dc Voltage ◽  
Multilevel Inverters ◽  
Multilevel Structure ◽  
Simulink Simulation ◽  
Dc Power ◽  
Switching Pattern ◽  
Cascaded Multilevel Inverter

Multilevel inverters can manufacture a high- power, high- voltage inverter with a multilevel structure to control the voltage of the device. A symmetrical multilevel cascaded standard inverter requires 'n' DC sources for' 2n+1' levels that require isolated DC sources for power conversions. The objective of this paper is to increase the number of levels by reducing the number of dc sources. The proposed scheme is to use a multilevel asymmetrical inverter with a separate DC power supply. The analysis is extended to the use of the single DC power source with the remaining ' n-1 ' DC source being a capacitor and simultaneously maintains the capacitor 's DC voltage level and selects a fundamental frequency switching pattern to produce an almost sinusoidal output. Matlab simulink simulation is performed to verify the performance of the Asymmetrical Multilevel Inverter using isolated Dc source. The results of simulation and hardware are presented and discussed in this paper.

Cascaded Multilevel Inverter IM Speed-Sensorless Vector Control System Based on MRAS Theory

2013 ◽  
Vol 344 ◽  
pp. 159-163
Author(s):  
Zhen Jun Lin ◽  
Sheng Hua Huang
Keyword(s):  
Vector Control ◽  
Induction Motor ◽  
Low Voltage ◽  
Multilevel Inverter ◽  
Speed Sensorless ◽  
Multilevel Inverters ◽  
Sensorless Vector Control ◽  
Simulation And Experiment ◽  
Vector Control System ◽  
Cascaded Multilevel Inverter

Cascaded multilevel inverters could realize high-voltage output based on a series connection of power cells which use standard low-voltage component configurations. This characteristic could achieve high-quality output voltage waveforms and input current waveforms. These merits are made for motor control, especially in the field of speed-sensorless vector control of induction motor based on the theory of MRAS. This paper constructs a simulation system with the help of MATLB/SIMULINK and a system combined cascaded H-bridge multilevel inverter with induction motor with the help of DSP and FPGA. The simulation and experiment results verified the superiority of cascaded multilevel inverter applied on the MRAS speed-sensorless vector control of induction motor.

scholarly journals Non-conventional Cascade Multilevel Inverter with Lower Number of Switches by Using Multilevel PWM

2021 ◽  
Vol 17 (1) ◽  
pp. 1-13
Author(s):  
Adala Abdali ◽  
Ali Abdulabbas ◽  
Habeeb Nekad
Keyword(s):  
High Voltage ◽  
High Power ◽  
Power Loss ◽  
Output Voltage ◽  
Lower Number ◽  
Multilevel Inverter ◽  
Three Phase ◽  
Multi Level ◽  
Simulation Results ◽  
Circuit Configuration

The multilevel inverter is attracting the specialist in medium and high voltage applications, among its types, the cascade H bridge Multi-Level Inverter (MLI), commonly used for high power and high voltage applications. The main advantage of the conventional cascade (MLI) is generated a large number of output voltage levels but it demands a large number of components that produce complexity in the control circuit, and high cost. Along these lines, this paper presents a brief about the non-conventional cascade multilevel topologies that can produce a high number of output voltage levels with the least components. The non-conventional cascade (MLI) in this paper was built to reduce the number of switches, simplify the circuit configuration, uncomplicated control, and minimize the system cost. Besides, it reduces THD and increases efficiency. Two topologies of non-conventional cascade MLI three phase, the Nine level and Seventeen level are presented. The PWM technique is used to control the switches. The simulation results show a better performance for both topologies. THD, the power loss and the efficiency of the two topologies are calculated and drawn to the different values of the Modulation index (ma).

Application of Cascaded Multilevel Inverter for High Voltage Grid-Connected PV System

2015 ◽  
Vol 1092-1093 ◽  
pp. 17-21
Author(s):  
Yi Dan Li ◽  
Du Ting Wang ◽  
Hong Ming Kang ◽  
Hong Fang Ru
Keyword(s):  
Multilevel Inverter ◽  
Operating Voltage ◽  
Generation System ◽  
Pv System ◽  
Photovoltaic Generation ◽  
In Series ◽  
Simulation Results ◽  
High Level ◽  
Pv Generation ◽  
Cascaded Multilevel Inverter

The cascaded multilevel inverter may be the best topology to satisfy continuously increasing capacity and scale of grid-connected photovoltaic generation system due to its modularized circuit layout and sufficiently high operating voltage without devices in series. The operating principle of the cascaded multilevel inverter is presented. The control strategy of carrier phase shift PWM is proposed and discussed in detail. A grid-connected photovoltaic (PV) generation system based on a seven level cascaded inverter is provided. Simulation model of a seven level cascaded inverter with phase shifted PWM is built in Simulink environment and simulation results verify that the cascaded multilevel inverter can output high level voltage without devices in series, reduce harmonics, and output high quality waveforms.

Analysis and Experimentation of a Three Phase Asymmetric Cascaded Multilevel Inverter for Electric Vehicles

2013 ◽  
Vol 768 ◽  
pp. 231-237
Author(s):  
R. Seyezhai ◽  
K. Radha Sree ◽  
K. Sivapathi ◽  
V. Vardhaman
Keyword(s):  
Electric Vehicles ◽  
Carrier Phase ◽  
Multilevel Inverter ◽  
Variable Frequency ◽  
Multilevel Inverters ◽  
Flexible Ac Transmission ◽  
Switching Losses ◽  
Three Phase ◽  
Ac Transmission ◽  
Cascaded Multilevel Inverter

Multilevel inverters have been gaining immense popularity in high power applications such as Electric vehicles, Flexible AC Transmission Systems etc. This paper focuses on an asymmetric cascaded multilevel inverter employing the variable frequency carrier phase shifted PWM technique. The major advantage of this strategy is that it aids in balancing the switch utilization. The proposed strategy was found to have lower THD and switching losses when compared to the conventional strategies. The simulation was performed using MATLAB/Simulink and the results were verified experimentally.

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.

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