Performance Evaluation of Modified 5-Level T-Type H-Bridge Inverter Utilizing Different PWM Modulation Schemes

Mustafa, Uvais; Arif, Muhammad; Ahmad, Shahbaz; Tariq, Mohd; Ayob, Shahrin Md.

doi:10.1109/i-pact44901.2019.8960095

Cited by 11 publications

(8 citation statements)

References 19 publications

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“…Similarly, 120 o timeshifting for SWM and THS generates THMW for phase B and C clusters. The mathematical formulations provide an opportunity to take constant injection levels of THS [20,21]. However, this work analyses the optimal approach over the constant injection method.…”

Section: Basics Attributes Of Thi Modulationmentioning

confidence: 99%

“…The carrier-based schemes employ higher switching frequency and are less used for multilevel converters [15][16][17]. The integration of THI with various modulation schemes is essential for improving the power quality of the multilevel converter [18][19][20][21]. The modified carrier techniques are discussed for power quality improvement of a single-source solar converter [22].…”

Section: Introductionmentioning

confidence: 99%

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Optimal third harmonic injection based nearest level control of large‐scale solar photovoltaic multilevel converter

Yadav

Mishra

Singh

2022

Energy Conversion and Econom

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This paper presents a new control approach with an optimal third harmonic injectionbased nearest level modulation (OTHI-NLM) technique for a large-scale solar photovoltaic (SPV) system. This system uses a single-source multilevel converter to feed solar power into the grid. The merits of the optimal third harmonic injection (OTHI) and nearest level modulation (NLM) are considered for switching the SPV converter. A unique analysis to have an adaptive optimal injection with varying solar irradiance is conducted and compared with the well-known carrier-based high-frequency switching technique. The variations of harmonics for OTHI-NLM, an optimal third harmonic pulse width modulation (OTHI-PWM), and a constant third harmonic injection method are analysed at different irradiance levels. This optimal injection provides benefits such as enhanced DC bus utilization (DBU), better harmonics performance at different solar irradiance levels. The detailed methodology of the OTHI algorithm, nearest level modulation (NLM) technique with an optimal quotient calculation, and an instantaneous optimal third harmonic injection (THI) in closed-loop are presented. The comparative analysis shows the effectiveness of the SPV grid-tied structure over well-known ones. The power quality of the renewable energy system is investigated in dynamic solar irradiations. Moreover, simulation results are presented and validated in a real-time test bench.

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Section: Basics Attributes Of Thi Modulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal third harmonic injection based nearest level control of large‐scale solar photovoltaic multilevel converter

Yadav

Mishra

Singh

2022

Energy Conversion and Econom

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“…The performance of an MLI inverter depends on the chosen modulation strategy for the generation of switching signals. 42 However, they increase the switching losses and thus are not suitable for highpower applications. Fundamental frequency-based techniques are particularly suited for high-power applications because of low switching losses.…”

Section: Switching Strategymentioning

confidence: 99%

Asymmetrical 21‐level inverter topology with minimum variety of dc sources and reduced component counts

Arif

Mustafa

Ahmad

et al. 2022

Circuit Theory & Apps

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This paper proposes an asymmetrical multilevel inverter (MLI) topology. The inverter utilizes 12 switches, four dc sources, and two diodes to generate 21 levels. The main advantage of the converter is that it can generate 21 levels with a reduced number of switches, dc sources, and a variety of sources compared with other MLI topologies. It only utilizes two varieties of dc sources to generate the 21 levels. In addition, the topology can be easily extended to the n-level topology. The efficiency of the proposed MLI is determined by considering switching and conduction losses in the switches using PLECS, and simulation is carried out in MATLAB/SIMULINK. The nearest level control (NLC) technique is deployed to generate the switching signals. The inverter has 3.91% THD in the output voltage without filtering. The maximum voltage stress to withstand is found to be 0.7 per unit. Economic analysis of the topology is done to determine its feasibility, and the cost factor is found to be 1.53 per level, making it an economically viable option. To validate the performance of the proposed converter, an experimental prototype is developed in the laboratory and tested under different loading conditions. The comparison of the proposed topology with other MLI structures is based on the number of voltage levels, dc sources, variety of sources, driver circuits, and the TSV. Results obtained show that the proposed topology outperformed other topologies on many parameters.

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“…Although several switching strategies are present in the literature, nearest level control (NLC) is used in this work because of its simplicity [27]. It is a level control PWM technique for low switching frequency.…”

Section: Design and Simulationmentioning

confidence: 99%

Asymmetrical eleven‐level inverter topology with reduced power semiconductor switches, total standing voltage and cost factor

Mustafa

Arif

Kennel

et al. 2021

IET Power Electronics

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Voltage source multilevel inverters (MLI) is widely utilized in medium and high‐power applications due to their advantages. Here, an 11‐level, asymmetrical multilevel inverter topology is proposed. The topology utilizes four unidirectional switches, three bidirectional switches along with two dc sources. The proposed configuration of switches and the concept of the dc‐link capacitor is utilized to generate eleven level output voltage. The reduced number of components such as power switches and DC sources, lower control complexity due to capacitors' self‐balancing nature, and low total standing voltage (TSV) are the critical features of the proposed topology. Moreover, a reliability assessment of the topology shows that the topology has a high mean time to fault (MTTF), which makes it robust and reliable. Matlab/Simulink environment is used to develop a simulation model of the proposed topology, while PLECS is used for the thermal modelling and analysis of the converter. A prototype is developed and tested in the laboratory to validate the performance for different loading conditions. The proposed topology can be cascaded to produce the ‘n’ number of levels. The critical comparison of the proposed topology shows that the proposed circuit has advantages over other compared topologies.

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Performance Evaluation of Modified 5-Level T-Type H-Bridge Inverter Utilizing Different PWM Modulation Schemes

Cited by 11 publications

References 19 publications

Optimal third harmonic injection based nearest level control of large‐scale solar photovoltaic multilevel converter

Optimal third harmonic injection based nearest level control of large‐scale solar photovoltaic multilevel converter

Asymmetrical 21‐level inverter topology with minimum variety of dc sources and reduced component counts

Asymmetrical eleven‐level inverter topology with reduced power semiconductor switches, total standing voltage and cost factor

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