Reliability Analysis and Fault-Tolerant Operation in a Multilevel Inverter for Industrial Application

Fahad, Mohammad; Alsultan, Marwan; Ahmad, Shafiq; Sarwar, Adil; Tariq, Mohd; Khan, Irfan

doi:10.3390/electronics11010098

Cited by 8 publications

(4 citation statements)

References 32 publications

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“…A fifteen-level FT MLI topology (TP22) is proposed in [57], and it is shown in Figure 21. TP22 comprises four DC sources, one bidirectional switch, and ten unidirectional switches.…”

Section: Tp22mentioning

confidence: 99%

Single-Phase Fault Tolerant Multilevel Inverter Topologies—Comprehensive Review and Novel Comparative Factors

et al. 2022

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Multilevel inverters (MLIs) are used in a variety of industrial applications in high- and medium-voltage systems. The modularity, high-power output from medium voltages, and low harmonic content are some of the advantages of MLIs. The reliability of MLIs is quite important. The reliability is affected by different kinds of faults occurring in the MLIs. In MLI circuits, switching devices are the most vulnerable components and have a major involvement in all types of faults. As an outcome, it is necessary to take proper corrective action in the event of a fault. This work provides a comprehensive review of different fault tolerant (FT) solutions for MLIs in the event of switch fault. Moreover, various single-phase FT MLI topologies are reviewed, along with their constructional features, merits, and demerits. This work also proposes a comparison approach that integrates novel factors to account for fault tolerance quantitatively. A comparison investigation verifies the effectiveness of the proposed method. The FT operation of an existing five-level FT MLI topology is discussed, simulated, and experimentally verified.

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“…A fifteen-level FT MLI topology (TP22) is proposed in [57], and it is shown in Figure 21. TP22 comprises four DC sources, one bidirectional switch, and ten unidirectional switches.…”

Section: Tp22mentioning

confidence: 99%

Single-Phase Fault Tolerant Multilevel Inverter Topologies—Comprehensive Review and Novel Comparative Factors

et al. 2022

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“…These unplanned interruptions may cause significant safety concerns and an increase in system operation costs as well [9]. It is therefore clear that the push toward ever-more reliable power electronic products is critical for all industries power networks in rural areas, critical medical equipment power supplies, aircraft, and naval power systems, satellite systems with unfeasible maintenance, and wind and solar farm with extensive and widely distributed parts [10]. Considerable manufacturers have been getting a growing awareness of the protection efficiency and maintenance costs of power electronic devices [4].…”

Section: Introductionmentioning

confidence: 99%

Fault Management Techniques to Enhance the Reliability of Power Electronic Converters: An Overview

et al. 2023

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The reliability of power electronic converters is a major concern in industrial applications because of using prone-to-failure elements such as high-power semiconductor devices and electronic capacitors. Hence, designing fault-tolerant inverters has been of great interest among researchers in both academia and industry over the last decade. Among the three stages of fault management, compensating the fault is the most important and challenging part. The techniques for fault compensation can be classified into three groups: hardware redundancy methods which use extra switches, legs, or modules to replace the faulty parts directly or indirectly, switching states redundancy methods which are about omitting and replacing the impossible switching states, and unbalance compensation including the techniques to compensate for the unbalances in the system caused by a fault. In this paper, an overview of fault-tolerant inverters is presented. A classification of fault-tolerant inverters is demonstrated and major cases in each of its categories are explained.

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“…Similarly, control schemes, such as the use of a fuzzy-logic based gradient descent controller, have been proposed to protect the IBRs and enhance the grid resilience of the grid-tied IBRs during abnormal conditions [17]. Additionally, in the case of multilevel inverter-(MLC) based IBRS, the reliable five-level inverter topology, the hybrid control strategy which unites the nearest level control with PWM and a modulation-based scheme for withstanding open circuit fault due to failure of a switch [20][21][22], has also been proposed. The mentioned FRT schemes works efficiently in the GFL mode due to the low severity of the fault surges at the moment of fault recovery.…”

Section: Introductionmentioning

confidence: 99%

Design of an Optimal Adoptive Fault Ride through Scheme for Overcurrent Protection of Grid-Forming Inverter-Based Resources under Symmetrical Faults

Islam

Kim

2023

Sustainability

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As the integration of inverter-based resources (IBRs) is rapidly increasing in regard to the existing power system, switching from grid-following (GFL) to grid-forming (GFM) inverter control is the solution to maintain grid resilience. However, additional overcurrent protection, especially during fault transition, is required due to limited overcurrent capability and the high magnitude of spikes during fault recovery in IBRs, specifically in the GFM control mode. Furthermore, the power system stability should not be compromised by the employment of additional fault ride through (FRT) schemes. This article presents the design and implementation of an adoptive fault ride through (FRT) scheme for grid-forming inverters under symmetrical fault conditions. The proposed adoptive FRT scheme is comprised of two cascaded power electronic-based circuits, i.e., fault current ride through and a spikes reactor. This adoptive FRT scheme optimizes the fault variables during the fault time and suppresses the fault clearing spikes, without affecting system stability. A three-bus inverter-based grid-forming model is used in MATLAB/Simulink for the implementation of the proposed scheme. Further, a conventionally used FRT scheme, which includes fault current reactors, is simulated in the same test environment for justification of the proposed adoptive scheme. The adoptive FRT scheme is simulated for both time domain and frequency domain to analyze the response of harmonic distortion with the suppression of the fault current. Moreover, the proposed scheme is also simulated under the GFL mode of IBRs to justify the reliability of the scheme. The overall simulation results and performance evaluation indices authenticate the optimal, fault tolerant, harmonic, and spike-free behavior of the proposed scheme at both the AC and DC side of the grid-forming inverters.

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Reliability Analysis and Fault-Tolerant Operation in a Multilevel Inverter for Industrial Application

Cited by 8 publications

References 32 publications

Single-Phase Fault Tolerant Multilevel Inverter Topologies—Comprehensive Review and Novel Comparative Factors

Single-Phase Fault Tolerant Multilevel Inverter Topologies—Comprehensive Review and Novel Comparative Factors

Fault Management Techniques to Enhance the Reliability of Power Electronic Converters: An Overview

Design of an Optimal Adoptive Fault Ride through Scheme for Overcurrent Protection of Grid-Forming Inverter-Based Resources under Symmetrical Faults

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