Asymmetrical multilevel inverter topology with low total standing voltage and reduced switches count

Arif, M. Saad Bin; Sarwer, Zeeshan; Siddique, Marif Daula; Ayob, Shahrin Md.; Iqbal, Atif; Mekhilef, Saad

doi:10.1002/cta.2971

Cited by 27 publications

(16 citation statements)

References 30 publications

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“…In ST-type, four dc power supplies are used by different switching connections using 12 switches. Similarly, some other reduced switch countbased topologies have been reported in other works [11][12][13][14][15][16][17][18] ; however, in all these topologies, at least two switches need to withstand the maximum output voltage. In other studies, [19][20][21] several reduced switch count-based inverter topologies have been presented.…”

Section: Introductionmentioning

confidence: 58%

Analysis and implementation of a new asymmetric double H‐bridge multilevel inverter

Siddique

Iqbal

Sarwar

et al. 2021

Circuit Theory & Apps

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Multilevel inverters (MLI) have become an integral component in many industrial applications including drive systems and distributed generation grid integrated systems. Efficient and cost-effective MLI topologies are required to enhance the performance of industrial systems. In the present work, an asymmetric double H-bridge MLI is proposed, which incorporates and enhances the attributes of a modified T-type converter and produces a superior output voltage waveform with the lesser component requirement. The proposed MLI can generate a 15-level output. An extendable generalized topology (cascaded) based on the proposed configuration has also been proposed. The topology is compared with recently introduced MLI topologies based on various performance parameters, and results are presented. The output voltage control is achieved using nearest level control which is a low switching frequency modulation technique for lowering the switching losses in the inverter. The hardware is realized, and performance is evaluated under different dynamically changing loading conditions.

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Section: Introductionmentioning

confidence: 58%

Analysis and implementation of a new asymmetric double H‐bridge multilevel inverter

Siddique

Iqbal

Sarwar

et al. 2021

Circuit Theory & Apps

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“…Asymmetric MLI is usually CHB-MLI type in which the value of the voltage of any one DC source varies dynamically [159,160]. The main merits include: (i) generation of output voltage waveform with minimum THDs [39,161,162]; (ii) requires reduced number of semiconductor devices in comparison to symmetric topology [163]; (iii) needs only 12 switching units to attain seven, nine, fifteen and twenty-one levels [164]; (iv) operates with reduced dimension and cost of the inverter [165] and (v) enhanced reliability due to operation with fewer semiconductor switches and capacitors [166]. Asymmetric topologies with H-bridge have been further classified into two types, and the details are highlighted below [167].…”

Section: H-bridge Topologies (I) Asymmetric H-bridge Topologymentioning

confidence: 99%

Multilevel Inverter: A Survey on Classical and Advanced Topologies, Control Schemes, Applications to Power System and Future Prospects

et al. 2021

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In recent years, multilevel inverters (MLIs) have emerged to be the most empowered power transformation technology for numerous operations such as renewable energy resources (RERs), flexible AC transmission systems (FACTS), electric motor drives, etc. MLI has gained popularity in medium- to high-power operations because of numerous merits such as minimum harmonic contents, less dissipation of power from power electronic switches, and less electromagnetic interference (EMI) at the receiving end. The MLI possesses many essential advantages in comparison to a conventional two-level inverter, such as voltage profile enhancement, increased efficiency of the overall system, the capability of high-quality output generation with the reduced switching frequency, decreased total harmonic distortions (THD) without reducing the power of the inverter and use of very low ratings of the device. Although classical MLIs find their use in various vital key areas, newer MLI configurations have an expanding concern to the limited count of power electronic devices, gate drivers, and isolated DC sources. In this review article, an attempt has been made to focus on various aspects of MLIs such as different configurations, modulation techniques, the concept of new reduced switch count MLI topologies, applications regarding interface with renewable energy, motor drives, and FACTS controller. Further, deep insights for future prospective towards hassle-free addition of MLI technology towards more enhanced application for various fields of the power system have also been discussed. This article is believed to be extremely helpful for academics, researchers, and industrialists working in the direction of MLI technology.

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“…The proposed new converters feature fewer isolated DC power supplies, fewer switches, and fewer gate drivers requirement and generate high-power quality with low total standing voltage. [1][2][3][4] For an efficient operation of a MLI, several modulation techniques are suggested for their control. Modulation strategies for MLIs are defined as techniques or methodologies for producing pulses for turning on and turning off the power semiconductor devices.…”

Section: Introductionmentioning

confidence: 99%

A neural network‐based selective harmonic elimination scheme for five‐level inverter

Maamar

Helaimi

Taleb

et al. 2021

Circuit Theory & Apps

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This paper presents the implementation of selective harmonic elimination (SHE) in a five-level inverter structure using artificial neural networks (ANNs). SHE is an effective low-frequency modulation technique to eliminate selected harmonics and control multilevel converters. The use of ANN-SHE requires the calculation of the optimum values of switching angles via the solving system of nonlinear equations for the total harmonic distortion (THD) reduction, where the nonlinear equations are founded by the complex Fourier series analysis of the inverter output voltage. The procured switching angle values are directly implemented by a multilayer perceptron (MLP) algorithm without a lookup table. The ANN model is obtained by training the neural network (NN), taking the modulation index (M) as an input and approximating switching angles as an output. A thorough analysis was carried out to show the programming steps of the proposed ANN-based SHE using Matlab/ Simulink environment. A realized inverter prototype steered by the proposed ANN-based SHE was tested with various modulation indexes on a real-time mode using a digital signal processor (DSP) C2000 Delfino-TMS320F28379Dembedded board. A comparison between the simulation results and the experimental data is presented. The obtained results illustrate that the experimental results match the simulation closely, and the ANN model provides a fast and precise estimate of the switching angles for each value of the modulation index.

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Asymmetrical multilevel inverter topology with low total standing voltage and reduced switches count

Cited by 27 publications

References 30 publications

Analysis and implementation of a new asymmetric double H‐bridge multilevel inverter

Analysis and implementation of a new asymmetric double H‐bridge multilevel inverter

Multilevel Inverter: A Survey on Classical and Advanced Topologies, Control Schemes, Applications to Power System and Future Prospects

A neural network‐based selective harmonic elimination scheme for five‐level inverter

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