New single phase asymmetric multilevel inverter with reduced number of power switches

Thiyagarajan, V.; Somasundaram, P.

doi:10.1109/icpedc.2017.8081090

Cited by 8 publications

(9 citation statements)

References 13 publications

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“…The angles corresponding to the period 0 to 90 o are called as main switching angles and are calculated using the following different methods [17][18][19].…”

Section: Switching Angle Calculationmentioning

confidence: 99%

“…Generally, the dc sources used in the multilevel inverter includes photovoltaic, capacitors and batteries [2]. They are classified into two groups such as symmetric inverter, where the all sources have same magnitude and asymmetric inverter, where the voltage sources have different magnitude [3]. The various advantages of multilevel inverters over conventional two level inverter includes low distortion, minimum switching losses high power quality, minimum peak inverse voltage (PIV) and low dv/dt stress [4][5].…”

Section: Introductionmentioning

confidence: 99%

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A New Seven Level Symmetrical Inverter with Reduced Switch Count

Thiyagarajan

Somasundaram

2018

IJPEDS

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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.

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“…The angles corresponding to the period 0 to 90 o are called as main switching angles and are calculated using the following different methods [17][18][19].…”

Section: Switching Angle Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A New Seven Level Symmetrical Inverter with Reduced Switch Count

Thiyagarajan

Somasundaram

2018

IJPEDS

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“…In modular multilevel inverters the number of levels in output QSW changes with the addition or removal of the modules, the features and advantages mentioned above make the SAC methods more suitable for calculation of new switching angles 61 . Therefore, the SAC methods are more attractive compared to other fundamental frequency methods and are widely used 62‐81 …”

Section: Introductionmentioning

confidence: 99%

“…The quality of the output QSW obtained using various SAC methods is different and can be assessed by computing THD of the QSW, magnitude of the fundamental frequency component, and the harmonic spectrum. There are many references 56,64,67,70,71 where different SAC methods are compared based mainly on THD in QSW. The SAC methods can be used for any number of levels, consequently the output QSW is expected to converge to sinusoidal wave as number of levels in QSW is increased.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of switching angle calculation methods for multilevel inverters

Muthyala

Dhabale

2021

Int Trans Electr Energ Syst

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Summary A multilevel inverter produces an output to approximate a desired sine wave. The closeness of the output waveform to the sine wave depends on the logic applied for switching angle calculation, resulting in different switching angle calculation methods. In this paper, various switching angle calculation methods are compared based on of the parameters quantifying the quality of the output waveform. The main focus of this work is on the study of convergence of the output waveform to a smooth waveform as number of levels increases theoretically. The convergence is analytically proved and validated numerically by computing up to 201 levels. Also, a parameter quantifying the deviation of the output waveform from the sine wave is defined, and its closed form expression is derived. This parameter is strongly correlated to and computationally less expensive than the total harmonic distortion. Hence, the deviation is proposed as a better measure of the quality of the output wave form. The convergence and the deviation of the output waveform are also used as the basis of the comparison of different switching angle calculation methods. These two give a better insight into the switching angle calculation methods. The analysis presented in this paper provides a good understanding of various switching angle computation methods and helps in choosing an appropriate method for a given application.

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“…Engineers have focused on designing and controlling an inverter which is appropriate for photovoltaic applications using this PV energy that is available in abundance. Since the 1960's multilevel inverters have been a research area which has attracted the interest of many [2]. In the literature, various topologies such as diode clamped, and flying capacitor in addition to the cascaded H -Bridge are exist [3].…”

Section: Introductionmentioning

confidence: 99%

An adaptable different-levels cascaded h-bridge inverter analysis for PV grid-connected systems

Ali¹,

Hamad²,

Abdulrazzaq³

2019

IJPEDS

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Multi-level inverters (MLIs), have gained popularity in the last few years as a result of their low total harmonic distortions (THD) as well as their output waveform which is of high quality. The converter which considers more appropriate for applications of photovoltaic (PV)beyond the varying MLIs arrangementsis the Cascaded H-Bridge-(CHB) (MLI), meanwhile each PV panel may be served as an independent DC supply for any CHB unit. Through the use of MATLAB/Simulink, the efficiency of symmetrical single phase MLI in terms of the number of switches, harmonic content in addition to the stresses of voltage through theswitches that exist at photovoltaic cell by means of input source is enhanced; varying parameters like output current, voltage and power, and THD at 5-level 7-level and 9-level Cascaded MLI are observed. In this paper, attention is paid to a multi-level topologies which is flexible and based on cascaded MLI intended for PV grids connected system. An observation of the output voltage becomes closer to the sine wave as the levels increase, while the increase in the levels of Cascaded Multilevel Inverter causes the total harmonic distortion to decrease.

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New single phase asymmetric multilevel inverter with reduced number of power switches

Cited by 8 publications

References 13 publications

A New Seven Level Symmetrical Inverter with Reduced Switch Count

A New Seven Level Symmetrical Inverter with Reduced Switch Count

Comparative analysis of switching angle calculation methods for multilevel inverters

An adaptable different-levels cascaded h-bridge inverter analysis for PV grid-connected systems

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