Improvement of Post-Fault Performance of a Cascaded H-bridge Multilevel Inverter

Ouni, Saeed; Zolghadri, Mohammad Reza; Khodabandeh, Masih; Shahbazi, Mahmoud; Rodríguez, José; Oraee, Hashem; Lezana, Pablo; Schmeisser, Andres Ulloa

doi:10.1109/tie.2016.2632058

Cited by 72 publications

(23 citation statements)

References 25 publications

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“…The reliability of the inverter is one of the important factors for the stable operation of the photovoltaic system [1]. Multilevel converter has the advantages of less harmonic content of output voltage, lower switching loss, and lower stress, and it is considered to be the best choice for medium-high voltage and high power occasions [2]. One of the viable topologies is the 24-switch five-level NPC inverter [3].…”

Section: Introductionmentioning

confidence: 99%

Fault Tolerant Control of Five-Level Inverter Based on Redundancy Space Vector Optimization and Topology Reconfigruation

Wei

2020

IEEE Access

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Compared with two-level and three-level inverters, five-level inverters have more redundant space vectors to implement flexible control strategy. A fault tolerance method for open circuit fault of power tube in Neutral Point Clamped (NPC) five level inverter is proposed. The open circuit fault of inverter is divided into type Ⅰ and type Ⅱ in this paper. Redundant space vector optimization and topological reconfiguration fault tolerance strategies are used for type I and type II failures, respectively. The basic vector of the synthetic reference vector Uref is reoptimize according to the redundant vector, and get a new control strategy after the decision. This method enables the inverter to achieve fault-tolerant operation without modifying hardware or adding bridge arms. The output performance of the inverter after fault is guaranteed and the cost of fault tolerance is greatly reduced. The feasibility and effectiveness of the proposed fault-tolerant method are verified through experiments.

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Section: Introductionmentioning

confidence: 99%

Fault Tolerant Control of Five-Level Inverter Based on Redundancy Space Vector Optimization and Topology Reconfigruation

Wei

2020

IEEE Access

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“…In order to develop FPSC with other modulation techniques, two methods based on space vector modulation and selective harmonic elimination (SHE) techniques have been proposed in [20, 21]. Modified FPSC solutions have been suggested in [22–24] for post‐fault operation of CHB in photovoltaic power plants and variable‐speed induction motor drives.…”

Section: Introductionmentioning

confidence: 99%

Improved post‐fault operation strategy for a cascaded H‐bridge based STATCOM

Neyshabouri

Iman‐Eini

Chaudhary

et al. 2020

IET power electron.

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“…Recent topologies of MLIs have been explored with an objective of fault tolerance capability [13][14][15]. Various solutions have been presented for FT operation [11,[16][17][18][19][20][21][22]. As per the type of hardware redundancy, these solutions are generally categorised into four cases [16]: (a) switch level, (b) leg level, (c) module level, and (d) system level.…”

Section: Introductionmentioning

confidence: 99%

Approach to synthesis of fault tolerant reduced device count multilevel inverters (FT RDC MLIs)

Dewangan

Gupta

2019

IET Power Electronics

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Multilevel inverters (MLIs) are rapidly acquiring techno-economic feasibility for both high-power and medium-power applications. Increased number of power switches has been cited as one of the most important limitations of MLIs; and to overcome it, a whole new class of MLI topologies has come up. These topologies are commonly called 'reduced device count' MLIs (RDC-MLIs). As the number of controlled switches is significantly reduced in RDC-MLIs, the redundant states are also reduced. Hence, the possibility of fault tolerant operation is severely affected. This study looks at the possibility of imparting fault-tolerant characteristics to RDC-MLIs. In this study, some of the recently proposed RDC-MLI topologies are first analysed for the possibility of fault tolerant operation in the case of 'any single switch open-circuit fault (ASSOF)'. Thereafter, an optimal addition of power switch is proposed which enables fault tolerant operation in the event of ASSOF. Furthermore, these modified RDC-MLIs are verified under normal and faulty conditions using software simulations and experimental setups and these results are presented.

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Improvement of Post-Fault Performance of a Cascaded H-bridge Multilevel Inverter

Cited by 72 publications

References 25 publications

Fault Tolerant Control of Five-Level Inverter Based on Redundancy Space Vector Optimization and Topology Reconfigruation

Fault Tolerant Control of Five-Level Inverter Based on Redundancy Space Vector Optimization and Topology Reconfigruation

Improved post‐fault operation strategy for a cascaded H‐bridge based STATCOM

Approach to synthesis of fault tolerant reduced device count multilevel inverters (FT RDC MLIs)

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