Reconfiguration of NPC Multilevel Inverters to Mitigate Short Circuit Faults Using Back-to-Back Switches

Chen, Weiqiang; Hotchkiss, Ethan; Bazzi, Ali M.

doi:10.24295/cpsstpea.2018.00005

Cited by 27 publications

(8 citation statements)

References 26 publications

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“…Different methods are proposed for fault tolerance and reconfiguration when a switch fault occurs in previous studies 14–23 . In previous works 14–17 having fault‐tolerant strategies corresponds to DC‐DC converters, 18 belongs to flying capacitor MLI, 19 suitable for two‐stage converters, 20 related to T‐type converter, 21 suitable for multiphase inverter, 22,23 and suitable for DCMLI. Madhukar and Sivakumar 24 proposed a topology that connects two switches and a center‐tapped transformer when a switch fault occurs.…”

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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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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“…The Multilevel Inverters have low dv/dt, high efficiency, improves the quality of output [2]. The three classical topologies NPC [3,4], FC [5,6], CHB [7,8] are widely using in many applications. For more levels of output, the CHB, NPC, and FC requires more gate driver circuits, semiconductor devices, and facing problems in balancing the capacitor voltages [9].…”

Section: Introductionmentioning

confidence: 99%

An Improved Single Phase Self-balancing Switched Capacitor Based Step-up Nine Level Inverter

Shaik¹,

Mani²,

Mopidevi³

2020

JESA

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The improved single phase switched capacitor based nine level inverter is presented in this article. A low DC input voltage is transformed into AC and boost up to the high output voltage without any Boost converter, inductors, transformers. The self-balancing process is involved in the states of charging and discharging of the capacitors. The presented topology does not have any H-bridge configurations which result in the low Total Standing Voltage (TSV). The Phase Disposition Carrier based PWM (PDCPWM) control technique is applied to the presented nine level inverter. The conduction loss, switching loss, efficiency and capacitor ratings are analyzed mathematically. The comparative analysis of the number of semiconductor switches, Total Standing Voltage, Peak Inverse Voltage between the presented topology and existing topology is explained in detail. Finally, using MATLAB/SIMULINK the proposed nine level inverter is simulated to realize the performance of the presented topology.

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“…A study on an autonomous photovoltaic system in an urban area of Mexico was led by Alberto et al in 2018 [31]. Research on the reconfiguration of a multi-state converter was carried out by Chen et al in 2018 [32].…”

Section: General Introductionmentioning

confidence: 99%

Hybrid Systems Optimization: Application to Hybrid Systems Photovoltaic Connected to Grid. A Mali Case Study

et al. 2019

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Access to electricity and supplying reliable energy are the key elements that support local economic development and contribute to reducing poverty. Moreover, the problem of environmental protection can be considered as a factor of sustainable development. In response to these many challenges, appropriate national and regional policies, as well as mechanisms, have been implemented. In Mali, strong dependence on the importation of oil, growth in demand, and the low rate of electrification have pushed the highest authorities to think of diversified technological solutions like renewable energy for the satisfaction of energy demands, especially photovoltaics, for which the country has significant potential. The hybrid systems used is a compromise, because the emission rate of carbon dioxide emitted by thermal power plants must be reduced and limited to preserve supernatural disasters. For this, hybrid photovoltaic systems coupled to the grid increased, but the management of the production of these photovoltaics poses a lot of problem due to its intermittent status. It is in this context that we conducted an optimization study of a hybrid system photovoltaic connected to the grid. We applied our approach to the most extensive distribution post of Mali capital. For the simulation, we used the modeling and simulation tool named HOMER.

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Reconfiguration of NPC Multilevel Inverters to Mitigate Short Circuit Faults Using Back-to-Back Switches

Cited by 27 publications

References 26 publications

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

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

An Improved Single Phase Self-balancing Switched Capacitor Based Step-up Nine Level Inverter

Hybrid Systems Optimization: Application to Hybrid Systems Photovoltaic Connected to Grid. A Mali Case Study

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