Single‐phase 9‐level hybridised cascaded multilevel inverter

Odeh, Charles I.; Nnadi, Damian B. N.

doi:10.1049/iet-pel.2012.0199

Cited by 76 publications

(68 citation statements)

References 41 publications

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“…The asymmetrical topologies presented in [6] and [20] are the best in synthesizing more levels in inverter output voltage with the same number of DC sources used in the symmetrical modes. The realization of asymmetrical MLIs, which has to be provided from DC voltage sources with different values, can be very costly and difficult.…”

Section: Comparative Analysismentioning

confidence: 99%

“…However, the symmetric topologies can produce a lower number of voltage levels in comparison with the asymmetric topologies. To have the same condition, the proposed topology in the symmetric mode P 1 is compared with the symmetric MLI topologies presented in [3], [5]- [6], [8], [13]- [14], [17]- [19], [22], [24] and with the symmetrical CHB [31]. The asymmetrical operation of the proposed multilevel inverter P 2 is also compared along with the asymmetrical operation of the topology in [22] represented as 'A' in Fig 4 (a)-(e).…”

Section: Comparative Analysismentioning

confidence: 99%

“…They are also equipped with an H-Bridge for polarity reversal to synthesize an odd number of output voltage levels of either polarity. The Type I LS part consists of an Auxiliary (AUX) switch of a bidirectional nature, formed by a switch surrounded by four diodes [5], [6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

Karasani¹,

Borghate²,

Meshram³

et al. 2016

Journal of Power Electronics

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In this paper, a single phase modified switched-diode topology for both symmetrical and asymmetrical cascaded multilevel inverters is presented. It consists of a Modified Switched-Diode Unit (MSDU) and a Twin Source Two Switch Unit (TSTSU) to produce distinct positive voltage levels according to the operating modes. An additional H-bridge synthesizes a voltage waveform, where the voltage levels of either polarity have less Total Harmonic Distortion (THD). Higher-level inverters can be built by cascading MSDUs. A comparative analysis is done with other topologies. The proposed topology results in reductions in the number of power switches, losses, installation area, voltage stress and converter cost. The Nearest Level Control (NLC) technique is employed to generate the gating signals for the power switches. To verify the performance of the proposed structure, simulation results are carried out by a PSIM under both steady state and dynamic conditions. Experimental results are presented to validate the simulation results.

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Section: Comparative Analysismentioning

confidence: 99%

Section: Comparative Analysismentioning

confidence: 99%

See 1 more Smart Citation

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

Karasani¹,

Borghate²,

Meshram³

et al. 2016

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…A multilevel inverter uses sinusoidal pulse width modulation technique with phase disposition principle [2]. Here we use single phase 9-level hybridised cascaded multilevel inverter for connecting it to the output of high step up converter.…”

Section: Hybrid Multilevel Invertermentioning

confidence: 99%

High Boost Converter and Hybrid Cascaded H Bridge Inverter for Photovoltaic System

R.Prakash¹

2014

IJAREEIE

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:The utilization of photovoltaic energy becomes an key source of electrical energy with the advancement in power electronic technology. The dc-dc converters is connected to PV system, for connecting the source to the grid or AC load through an inverter. MPPT (Maximum Power Point Tracking) increases the power production of the PV system. The advantages of high step up converters integration with voltage multiplier includes improving voltage gain without using extreme duty ratio, reduction of voltage stress, current ripple and conduction losses are desirable for renewable energy applications. A multilevel hybrid cascaded inverter is connected high step up converter for connecting to the ac load. KEYWORDS:High step up converter, voltage multiplier, renewable energy, photovoltaic system, high gain. I.INTRODUCTIONWith the development in power electronics technologies the renewable energy sources utilization become an increasing trend for electrical energy. The photovoltaic system is a feasible energy source in research and development work in power system and power electronics. High performance dc to dc converter can be obtained with MPPT technique and islanding detection for photovoltaic system are now considered for the interface to the grid or ac utilities [4]. The DC/AC inverters control the output voltage of DC/DC converter and generate a fundamental real power required for the loads.A voltage multiplier is a device which converts the low voltage input to a higher voltage by means of capacitors and diodes combined circuit. The voltage multiplier helps in reducing the turns ratio of transformer for better performance. The high step-up converter helps in improving the voltage gain, reduction of voltage stress and current ripple with optimized circuit performance. The integration of voltage multiplier reduces the input current ripple, hence the increases the life of PV arrays of the photovoltaic system. The output from PV, 30-40V is stepped to 300-400V by using dc-dc converters. The main factor depends on the selection of the PV array or cells in the photovoltaic system are the cost and efficiency. A novel cascaded hybrid inverter is connected to the output of the high boost converter for connecting ac loads in a photovoltaic system are discussed in this paper as shown in fig 1. II. MODELLING OF PHOTOVOLTAIC CELLThe solar radiations from the sun are converted to electric energy by the photovoltaic effect. The photons from the sun having band gap energy higher than the semiconductor material used, will produce electron-hole recombination, which depends on incident radiation. Electron-hole recombination result in the flow of photocurrent [5].The PV system depends on the cell temperature and solar insolation have non-linear characteristics for P-V and I-V curves. The

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“…Subsequently, several multilevel inverter configurations have been developed [11][12][13][14][15][16] in addition to the fundamental topologies:…”

Section: Introductionmentioning

confidence: 99%

Cascaded half-full-bridge PWM multilevel inverter configuration

Odeh¹

2016

Turk J Elec Eng & Comp Sci

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This paper presents a single-phase, cascaded half-full-bridge PWM multilevel inverter topology. It is made up of a main inverting H-bridge legs and level-clamping half-bridge circuits, each having its own dc source. The singlecarrier, multilevel PWM scheme is employed to generate gating signals for the power switches. The modulation scheme is hybridized to enable the output voltage of the proposed inverter configuration to inherit the features of switchingloss reduction from fundamental PWM and good harmonic performance from multiple sinusoidal PWM. Moreover, a simple base PWM circulation scheme is also introduced in this work to obtain a resultant sequential switching hybrid PWM (SSHPWM) circulation that balances power dissipation among the four power switches of the main H-bridge module. Operational principles with switching functions are given. For a modulation index of 0.9, the proposed inverter configuration was subjected to an R-L load and the respective numbers of output voltage level were synthesized. FFT analyses of the output voltage waveforms were carried out and the corresponding THD value of 13.16% was obtained.To verify the performance of the proposed inverter architecture, simulations and experiments were carried out on a 2.95 kW rated prototype of the proposed inverter for an R-L load and adequate results were obtained.

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Single‐phase 9‐level hybridised cascaded multilevel inverter

Cited by 76 publications

References 41 publications

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

A Modified Switched-Diode Topology for Cascaded Multilevel Inverters

High Boost Converter and Hybrid Cascaded H Bridge Inverter for Photovoltaic System

Cascaded half-full-bridge PWM multilevel inverter configuration

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