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Bertrand Raison
Centre national de la recherche scientifique
94Publications
18H-index
1,565Citations
Publications 94
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#1Alberto BertinatoH-Index: 1
Last.Bertrand Raison (UGA: University of Grenoble)H-Index: 18
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Symmetrical monopolar is nowadays one of the most common architecture employed in HVDC point-to-point interconnectors using Modular Multilevel Converter (MMC) technology. Future HVDC grids built in a stepwise approach, starting from the connection of the existing and future symmetric monopolar HVDC links, are therefore a possibility that can be taken into account. In such symmetrical monopolar configuration, a pole-to-ground fault in a DC link results in a low steady state DC fault current but i...
#2Bertrand Raison (UGA: University of Grenoble)H-Index: 18
Last.Nuno Silva (Bosch)H-Index: 2
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In this paper, fault detection and localization methods for a Low Voltage (LV) smart distribution grid are presented. Two fault detection approaches were examined based on current measurements at the beginning of the feeder and on the highest voltage drop across the feeder branches. The localization method was based solely on nodal rms voltage measurements. Five influencing factors were considered: location of the fault, time of the day, fault resistance value (ranging from 0.1 \Omega to $1 k...
#1Nikolaos Sapountzoglou (CNRS: Centre national de la recherche scientifique)
#2Bertrand Raison (CNRS: Centre national de la recherche scientifique)H-Index: 18
In this paper, a fault diagnosis method for grid-connected photovoltaic (GCPV) systems is presented. The method is based on the monitoring of the ac electrical variables and especially on the measurements of the currents and voltages at the output of the inverter. After a short introduction on the topic, the necessary steps to build a GCPV system model are described; the photovoltaic (PV) array is connected to the grid through a boost converter and an inverter. Four categories of faults were stu...
#1Bertrand Raison (UGA: University of Grenoble)H-Index: 18
#1Olivier Arguence (CNRS: Centre national de la recherche scientifique)H-Index: 1
#2Florent Cadoux (CNRS: Centre national de la recherche scientifique)H-Index: 4
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The contribution of decentralized generators in the provision of ancillary services, such as voltage and frequency regulations, is currently growing in many power systems. The impact of these new regulations on islanding detection is generally investigated by calculating the nondetection zone (NDZ) of the protective relay located at generator level. This subject has already been studied in the literature, but has been generally treated by means of steady-state calculations only. As demonstrated ...
This study proposes a non-selective protection strategy for multi-terminal high voltage direct current grids based on resistive-type superconducting fault current limiters (SFCLs). Located at the output of AC/DC converters, the SFCL limits the current contribution from the AC grid in case of DC fault. With this approach, the fault clearing time constraint is relieved allowing the use of mechanical DC circuit breakers for fault current interruption. Furthermore, the breaking capability and energy...
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