Reduced Voltage Stress Asymmetrical Multilevel Inverter With Optimal Components

Prasad, Devalraju; Dhanamjayulu, C.

doi:10.1109/access.2022.3176110

Cited by 16 publications

(7 citation statements)

References 35 publications

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“…Inverters with sinusoidal pulse width modulation (SPWM), effective filter design principles, and various PWM techniques are discussed and observed [16]. The literature review and multiple recommendations made by the authors in this field are considered.…”

Section: Related Workmentioning

confidence: 99%

Phase Shift APOD and POD Control Technique in Multi-Level Inverters to Mitigate Total Harmonic Distortion

Bano,

Abbas,

Hatatah

et al. 2024

Mathematics

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Multi-level inverters are widely employed to generate new energy because of their huge capacity and benefits in sound control performance. One of the critical areas of study for multi-level inverters is control strategy research. In this study, the control strategy for a multi-level inverter—which is frequently employed in HVDC and FACTS systems—is designed. An asymmetrical D.C. voltage source is supplied to create the appropriate output voltage waveform with fewer total harmonic distortions (THDs) at the output voltage and current waveforms. In this work, the pulse width modulation techniques of POD (phase opposition disposition) and APOD (alternative phase opposition disposition) MC PWM are applied to a multi-level inverter to generate the seven-level output voltage waveform. This study presents an enhanced variable carrier frequency APOD control approach that can successfully lower the overall harmonic distortion rate. The design and completion of the phase-shifting POD and APOD control strategies are followed by an analysis and comparison of the THD situation under various switching frequencies and a simulation and verification of the control strategy using MATLAB simulation. The TI DSP-based control approach has been programmed. The APOD technique increases the output voltage’s THD to 18.27%, while the output current waveform’s THD is reduced to 15.67% by utilizing the APOD PWM technique. Using the POD PWM approach increases the total harmonic distortion (THD) of the voltage waveform by 18.06% and the output current waveform’s THD by 15.45%.

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Section: Related Workmentioning

confidence: 99%

Phase Shift APOD and POD Control Technique in Multi-Level Inverters to Mitigate Total Harmonic Distortion

Bano,

Abbas,

Hatatah

et al. 2024

Mathematics

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“…The cost function is found by using [14] 𝐶𝑜𝑠𝑡 Function = (𝑁 ! + 𝑁 $" + 𝛼𝑇𝑆𝑉) × 𝑁 "# , (2) where α is the current coefficient factor.…”

Section: Fault-tolerant Topologymentioning

confidence: 99%

“…The sum of the standing voltage for power semiconductor devices in the proposed topology evaluates the total standing voltage (TSV). The generalized equation for voltage of unidirectional, bidirectional switches and TSV is given in [14] 𝑇𝑆𝑉…”

Section: Fault-tolerant Topologymentioning

confidence: 99%

“…The circuit connection and its various inevitable issues, such as voltage balancing, modularity, low efficiency, switch control, and a higher number of components of classical topologies, is discussed [7]. In this perspective, our researchers recently introduced a different configuration to increase the number of levels while decreasing component counts to reduce the problems faced with classical topologies [8][9][10][11][12][13][14][15][16]. An asymmetrical multilevel inverter is introduced [10].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Fault Tolerant Asymmetrical 21-Level Inverter Topology With Reduced Components

RAGUL¹,

Thiyagarajan²

2023

RRST-EE

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The foremost objective of this work is to propose a fault-tolerant (FT) asymmetrical 21-level inverter with minimal power semiconductor switches and voltage sources. The topology of the proposed inverter is to produce high voltage levels with low harmonic content and minimize electromagnetic interference (EMI) in the system. Meanwhile, the novelty has been proved by a detailed comparison between the suggested multilevel inverter (MLI) and recently introduced topologies using several components such as switches, capacitors, sources, gate driving circuits, total standing voltage (TSV), component count per level and cost function. Additionally, the flexible circuit connection between sources, switches, and loads provides the alternative configuration for 21-level MLI to operate as a 9-level and 7-level MLI topology, ensuring FT capability during the failure of specific sources and switches. The nearest voltage level (NVL) algorithm technique produces gate driver signals for the switches, which generate high-quality waveform compared to other pulse width modulation (PWM) techniques. A simulation model is designed to support the simulation results using MATLAB/Simulink software and hardware implementation. The results are analyzed under different combinations of linear and nonlinear loads. In both simulation and experiment, the evaluated parameter values show good performance concerning other structures, and total harmonic distortion (THD) is less than 5 % as per IEE519 standards.

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“…Recently, many hybrid topologies have been proposed by researchers mainly emerging from conventional topologies to attain power quality issues and high grid code standards economically [214][215][216][217][218][219][220]. Recent hybrid MLI topologies are mainly classified into reduced components with H-bridge topologies [221][222][223][224][225][226][227][228][229][230][231][232][233][234][235][236][237][238]; they have separate blocks for polarity and level generation and are best suited for LV applications, as shown in Figure 34(a). Reduced components without H-bridge topologies [239][240][241][242][243][244][245][246][247], capable of generating bipolar waveform, consisting of several unit cells connecting in serial, are mainly used in medium voltage (MV) applications, as shown in Figure 34(b).…”

Section: Hybrid MLI Topologiesmentioning

confidence: 99%

A Review of Control Techniques and Energy Storage for Inverter-Based Dynamic Voltage Restorer in Grid-Integrated Renewable Sources

Prasad

Dhanamjayulu

2022

Mathematical Problems in Engineering

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Power quality (PQ) is a key issue, particularly for technologically advanced process equipment, whose performance mainly depends on the quality of supply. Problems with PQ such as voltage swells/sags, interruptions, and harmonics are defined by any voltage, current, or frequency abnormalities causing damage or failure of the end-user equipment. Outages and interruptions lead to malfunctioning of end-user equipment or sensitive loads, such as diagnostic equipment in healthcare facilities, clinics, educational institutions, and detention centers, while further increasing significant economic losses. Custom power devices (CPDs) are recommended for enhancing power quality, and the best and most economical solution is considered to be the dynamic voltage restorer (DVR). Several methods are suggested to improve the PQ by using the dynamic voltage restorer; among them, most encouraging ways are to use a multilevel inverter (MLI) in the dynamic voltage restorer. This article combines the latest work of the literature, as well as a detailed discussion on PQ issues of the grid-integrated renewable energy sources (RESs), DVR principle with its operating procedures, system components, energy storage-based DVR topologies, DVR control unit, and DVR power converter-based topologies. In addition, synthesis of energy storage, control strategies, and multilevel inverters for DVR. This review benefits those interested in investigating DVR as a relevant and comprehensive reference.

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Reduced Voltage Stress Asymmetrical Multilevel Inverter With Optimal Components

Abstract: Date of publication xxxx 00, 0000, date of current version xxxx 00, 0000.

Cited by 16 publications

References 35 publications

Phase Shift APOD and POD Control Technique in Multi-Level Inverters to Mitigate Total Harmonic Distortion

Phase Shift APOD and POD Control Technique in Multi-Level Inverters to Mitigate Total Harmonic Distortion

A Novel Fault Tolerant Asymmetrical 21-Level Inverter Topology With Reduced Components

A Review of Control Techniques and Energy Storage for Inverter-Based Dynamic Voltage Restorer in Grid-Integrated Renewable Sources

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