Fault-Tolerant Structure for Cascaded H-bridge Multilevel Inverter using Relays

Patel, Monika D.; Pandya, Dharmesh J.; Raval, Dhaval Y.; Yagnik, Niral Yagnesh

doi:10.1109/iccpeic45300.2019.9082384

Cited by 5 publications

(5 citation statements)

References 10 publications

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“…A single-phase seven-level FT MLI is proposed in [84], and it is shown in Figure 48. It comprises three DC sources, sixteen relays, and twelve unidirectional switches.…”

Section: Tp53mentioning

confidence: 99%

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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 single-phase seven-level FT MLI is proposed in [84], and it is shown in Figure 48. It comprises three DC sources, sixteen relays, and twelve unidirectional switches.…”

Section: Tp53mentioning

confidence: 99%

“…During faulty operation, relays are used to reroute conducting paths. It is important to note that T S1 to T S7 are single-pole, single-throw (SP-ST) relays, and T D1 to T D9 are single-pole, double-throw (SP-DT) relays [84]. The PD-SPWM scheme is used for creating the gating pulses in the topology.…”

Section: Tp53mentioning

confidence: 99%

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

et al. 2022

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“…Redundancy is obtained if the cell of the H-bridge containing the defective component can be bypassed, preventing a cascade failure and allowing normal operation to continue. Patel et al 8 proposed a fault-tolerant framework for the Cascaded H-bridge multi-level inverter with three phases in their paper. If one of the three modules fails, the other two healthy modules will continue to supply output voltage with the same amplitude and voltage level when all three modules are working well.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Patel et al 8 proposed a fault-tolerant framework for the Cascaded H-bridge multi-level inverter with three phases in their paper. If one of the three modules fails, the other two healthy modules will continue to supply output voltage with the same amplitude and voltage level when all three modules are working well.…”

Section: Literature Reviewmentioning

confidence: 99%

Reliable speed control of a separately excited DC motor using advanced modified triple modular redundancy scheme in H-bridges

Saeed

Usman

Amin

2022

Advances in Mechanical Engineering

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The risk of danger in industries is increasing due to the unexpected shutdowns owing to the unwanted faults in the components. These faults can also lead to a complete failure of the system causing costly production losses and safety issues. Therefore, Fault-Tolerant Control (FTC) techniques are used for such systems to get better reliability, and safety to prevent faults. This paper presents a Modified Triple Modular Redundancy (MTMR) based fault-tolerant system for a separately excited Direct Current (DC) motor with a Fault Detection and Isolation (FDI) unit that can detect, isolate, and replace the faulty switch with the standby switches to prevent the unwanted shut down of the system and support the process continuity thereby increasing reliability. The proposed MTMR will still be able to provide output with only one healthy switch with the other two in the faulty conditions. MATLAB/Simulink software was used for the experimentation process to check the performance of the system. The presented work establishes that the MTMR-based fault-tolerant H-bridge with the FDI unit is a highly reliable solution for the speed control of a separately excited DC motor. The comparison of the proposed work with existing works also demonstrates its superior performance.

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“…However, this topology has more number of switches to faulty states. A new fault‐tolerant structure with relays has been proposed in Patel et al 29 Note that this topology has reduced the number of levels during the faulty period and needs to add relays to detect the fault. Kumar et al 30 proposed a new fault‐tolerant topology with reduced device count, and this topology applies to T‐type converters only.…”

Section: Introductionmentioning

confidence: 99%

Grid integration of three phase solar powered fault‐tolerant cascaded H‐bridge inverter

Rajesh

Nakka

Kishore

2022

Circuit Theory & Apps

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Grid integration of solar photovoltaic (PV) systems is becoming popular recently due to the merits of stable support to conventional grid, limiting global warming and reduced emissions. However, maintaining capacitor voltage balancing, unity power factor, sinusoidal grid current, and harmonic profile improvement are challenging tasks owing to change in irradiation conditions. Multilevel inverters (MLI) in grid-connected systems will enhance the system's power quality in terms of voltage and current total harmonic distortion (THD). One of the most promising multilevel topologies for renewable energy applications is the cascaded H-bridge (CHB) inverter. Since CHB inverters include many components, they have a higher risk of failure, lowering system reliability. Due to the change in irradiation condition, the voltage across the corresponding DC link capacitor may vary. Therefore, the DC-link capacitor balancing is mandatory and done by an individual control scheme. This paper presents a highly reliable, robust, and modular solar PV-fed faulttolerant CHB inverter with an individual voltage/current control strategy for grid integration. Higher reliability and modularity, power factor correction, and harmonic profile improvement are the main objectives of the proposed system. The proposed system has been simulated in MATLAB/Simulink and validated with experimental results on the developed prototype for different irradiation conditions.

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Fault-Tolerant Structure for Cascaded H-bridge Multilevel Inverter using Relays

Cited by 5 publications

References 10 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

Reliable speed control of a separately excited DC motor using advanced modified triple modular redundancy scheme in H-bridges

Grid integration of three phase solar powered fault‐tolerant cascaded H‐bridge inverter

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