Model-Based Voltage Quality Analysis and Optimization in Post-Fault Reconfigured N-Level NPC Inverter

Chen, Weiqiang; Bazzi, Ali M.

doi:10.1109/tpel.2021.3088673

Cited by 7 publications

(3 citation statements)

References 42 publications

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“…In this approach, mathematical models of the converter system are used for fault detection and an observer or state estimator is used to estimate unavailable current states [19,[51][52][53][54][55][56][57][58][59][60]. The reliability of this method depends on the accuracy of the model.…”

Section: Model Based Fault Diagnostic Methodsmentioning

confidence: 99%

A Review of Open-Circuit Switch Fault Diagnostic Methods for Neutral Point Clamped Inverter

et al. 2022

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Due to numerous advantages, a neutral point clamped (NPC) inverter is a preferred choice for high-power applications and renewable technology. The reliability of the NPC inverter is a major concerning factor during the assessment of system performance as power semiconductor switches are vulnerable to abnormal conditions. Open-circuit (OC) switch faults are not as dangerous as short circuit (SC) faults but eventually have enough potential to cause cascaded failure to other components in the system and thus need to be supervised carefully. The OC faults result in a distortion of voltage and current signals in the NPC converter. Based on these signals, over the past few years, many efforts have been made to identify and localize the OC switch fault to the switch level in the NPC topology. In this paper, a review of different OC switch fault diagnostic methods is provided. Starting from the NPC inverter operation under healthy and faulty conditions, the various possible and unavailable switching states along with the deviation in pole voltage under different switch fault conditions is discussed. Then, based on the approach used for system-based fault detection, the OC fault detection methods are classified. The various OC methods are further discussed on the basis of signal, i.e., current, voltage or a combination of both signals used as a signature for fault detection. Emphasis is given to the principle involved, diagnostic variables utilized, the implementation approach and the diagnostic time required. Finally, the approaches are tabulated so as to provide a quick reference for NPC fault diagnostics.

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Section: Model Based Fault Diagnostic Methodsmentioning

confidence: 99%

A Review of Open-Circuit Switch Fault Diagnostic Methods for Neutral Point Clamped Inverter

et al. 2022

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“…However, due to the poor reverse recovery characteristics of the body diode, those that are MOSFET-based have a risk of device failure, which is related to the phase-leg shoot, and this may cause false triggering of the gate voltage. Therefore, conventional H-bridge converters often use IGBTs [14][15][16][17]. The dual boost/buck converter can avoid the shootthrough problem effectively, and the freewheeling current flows through the independent diode to resolve the MOSFET body diode reverse recovery problem [14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, conventional H-bridge converters often use IGBTs [14][15][16][17]. The dual boost/buck converter can avoid the shootthrough problem effectively, and the freewheeling current flows through the independent diode to resolve the MOSFET body diode reverse recovery problem [14][15][16][17][18][19][20][21]. However, due to the two inductance structures of the dual boost/buck converter, the volume and weight of the converter will increase.…”

Section: Introductionmentioning

confidence: 99%

A Family of Five-Level Pseudo-Totem Pole Dual Boost Converters

Zhao,

Miao,

Dai

et al. 2023

Electronics

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In this paper, based on the pseudo-totem pole (PTP) circuit, a family of five-level PTP dual boost converters (PDBC) is proposed. A dual boost converter has some unique advantages, such as having no risk of bridge arm shoot-through and no problems related to switch body diode reverse recovery; thus, it has a good potential for applications. First, the derivation process, working principle, modulation and strategy of the topology are analyzed. Further, the number of power devices, switch voltages and current stress of the proposed topology is analyzed. Finally, a representative five-level PDBC experimental prototype is designed with AC input 220 V/50 Hz, DC output 400 V/1 kW, and peak efficiency of 98.27%. The experimental results show that the five-level PDBC proposed in this paper has higher efficiency and the correctness of its topology is verified.

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A fault-tolerant topology for single-phase H-bridge inverters addressing open- and short-circuit failures for industrial applications

Djaghloul,

Khan,

El Khamlichi Drissi

et al. 2025

Franklin Open

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Model-Based Voltage Quality Analysis and Optimization in Post-Fault Reconfigured N-Level NPC Inverter

Cited by 7 publications

References 42 publications

A Review of Open-Circuit Switch Fault Diagnostic Methods for Neutral Point Clamped Inverter

A Review of Open-Circuit Switch Fault Diagnostic Methods for Neutral Point Clamped Inverter

A Family of Five-Level Pseudo-Totem Pole Dual Boost Converters

A fault-tolerant topology for single-phase H-bridge inverters addressing open- and short-circuit failures for industrial applications

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