A New Cascaded Switched-Capacitor Multilevel Inverter Based on Improved Series–Parallel Conversion With Less Number of Components

Zamiri, Elyas; Vosoughi, Naser; Hosseini, Seyed Hossein; Barzegarkhoo, Reza; Sabahi, Mehran

doi:10.1109/tie.2016.2529563

Cited by 220 publications

(166 citation statements)

References 30 publications

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“…In this context, the notion of multilevel inverters has been first introduced in 1975 [3]. Moreover, vehicular industries, renewable energy systems, soft drive applications, and flexible AC transmission systems are the other mature technologies that are benefitting multilevel inverters [6][7][8][9]. This characteristic ends in promising features among which the better electromagnetic compatibility, lower harmonic contents, and reduced switching losses could be named [4,5].…”

Section: Introductionmentioning

confidence: 99%

A simple unit cell structure for an efficient sketch of series‐connected multilevel inverters

Choupan

Nazarpour

Golshannavaz

2017

Circuit Theory & Apps

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This paper develops a simple design of unit cells to be taken in use in series-connected multilevel inverters. The proposed structure not only reduces the part counts efficiently but also increases the number of generated levels in the output voltage. By aggregating the cascaded series-connected units as the basic module, the proposed structure follows one H-bridge circuit. The basic module acts as the initial stage in direct current/alternative current conversion within which all the positive and zero levels are produced. Afterwards, the H-bridge circuit affords the production of symmetric sine-wave by realizing negative levels.To assure the expected operational objectives, we developed three different algorithms to determine the magnitude of input direct current voltage sources. Moreover, to further investigate the proposed structure, different switching algorithms such the fundamental switching frequency and pulse width modulation level shifting approaches are implemented and compared with each other. Extensive numerical and experimental studies are conducted to yield in a suitable evaluation platform. The obtained results demonstrate a superior performance of the proposed structure rather than the conventional topologies.depreciate the satisfactory performance of the proposed structure for low levels output voltages. For these cases, the THD content increases. This point is easily recognized in Figure 22. However, by increasing the number of levels, we obtained a more sinusoidal and clean waveform. Thus, a higher service quality is guaranteed. This in turn increases the count of power electronics devices and Figure 18. Experimental results for the proposed nine-level structure. (a) Basic module voltage (V o1 + V o2 ), (Time/div = 5 ms), and (Voltage/div = 2 V by 1:10 probe). (b) Sinusoidal output voltage waveform. (c) Output current waveform. [Colour figure can be viewed at wileyonlinelibrary.com]

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Section: Introductionmentioning

confidence: 99%

A simple unit cell structure for an efficient sketch of series‐connected multilevel inverters

Choupan

Nazarpour

Golshannavaz

2017

Circuit Theory & Apps

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“…For the power loss analysis, a linear approximation relation between voltage and current of the power switch is assumed. From the above discussion, energy losses of the particular switch k , E off , k and E on , k , can be expressed by the following expressions:

E_{italicoff, k} = \int_{0}^{t_{italicoff}} v ((), t) i ((), t) italicdt = \frac{1}{6} V_{italicsw, k} {It}_{off},

E_{italicon, k} = \int_{0}^{t_{italicon}} v ((), t) i ((), t) italicdt = \frac{1}{6} V_{italicsw, k} I^{'} t_{on} .

…”

Section: Power Losses Analysis Of Vvcamimentioning

confidence: 99%

Buck converter-based cascaded asymmetrical multilevel inverter with reduced components

Singh

Dahiya

Saini

2017

Int Trans Electr Energ Syst

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Summary In this paper, a new topology of the cascaded asymmetrical multilevel inverter (CAMI) has been presented. In the output voltage of the CAMI, a high number of levels are required to reduce the total harmonic distortion (THD). To increase the number of levels, more auxiliary H‐bridges are required to connect with the MAIN H‐bridge of the CAMI, which increases the number of components, cost, and space for installation. To solve this problem, a low‐rating buck converter is connected with one of the auxiliary bridge. With this modification, any number of levels can be achieved in the output voltage with lesser number of circuit components. To show the ability of the proposed variable voltage CAMI, it is compared with existing cascaded multilevel inverter topologies in terms of number of semiconductor devices, the number of DC sources, variety of DC sources, total standing voltage, the number of semiconductor devices in the current path, efficiency, and THD. In this paper, simulation of the proposed topology with nearest level control modulation has been performed using MATLAB/SIMULINK environment. The output voltage, load current, power factor, power, and THD have been obtained by simulation of 21‐level variable voltage CAMI and are validated by experiment results under a resistive and motor load. Hardware implementation has been done by compiling nearest level control modulation into dSPACE DS1104 R&D controller board.

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“…Figure 3 shows the used switched capacitor converter, which is obtained from a generalized structure, presented in [13], [14]. This DC-DC converter is composed of one DC voltage source (Vin), 3 diodes, 3 capacitors and 8 switches (power MOSFET).…”

Section: Fig 2simple Model Of a Solar Cellmentioning

confidence: 99%

Implementation of a Single Phase Switched-Capacitor Nine-Level Inverter for PV System Applications with Selective Harmonic Elimination

Nouaiti¹,

Saâd²,

Mesbahi³

et al. 2017

IJCA

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The main objective of this paper is to present a test a single phase switched capacitor nine-level inverter for PV system applications, with a simple harmonic elimination method. The main elements of the used multilevel inverter are a high power switched capacitor DC-DC converter and a high power DC-AC converter. The studied system with the proposed control method was tested on MATLAB/SIMULINK with solar panels. Also, an experimental test bench was prepared and used to validate the simulation results. The all obtained results prove the high efficiency of the studied PV system with the implemented control method.

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A New Cascaded Switched-Capacitor Multilevel Inverter Based on Improved Series–Parallel Conversion With Less Number of Components

Cited by 220 publications

References 30 publications

A simple unit cell structure for an efficient sketch of series‐connected multilevel inverters

A simple unit cell structure for an efficient sketch of series‐connected multilevel inverters

Buck converter-based cascaded asymmetrical multilevel inverter with reduced components

Implementation of a Single Phase Switched-Capacitor Nine-Level Inverter for PV System Applications with Selective Harmonic Elimination

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