Interest of using a micro-meter spatial resolution to study SiC semi-conductor devices by Optical Beam Induced Current (OBIC)

2019-09-30T11:44:23+02:00September 30th, 2019|Power Electronics & Converters, Publications|

In this paper we present a new test bench called micro-OBIC used to characterized wide band gap semi-conductor. Micro-OBIC allows to scan an Optical Beam Induced Current (OBIC) signal with a microscopic spatial resolution. We used micro-OBIC to characterize peripheral protection such as MESA, JTE or JTE in high voltage SiC device.

Static and Switching Characteristics of 10 kV-class SiC BJTs and Darlingtons

2019-09-30T11:48:18+02:00September 30th, 2019|Power Electronics & Converters, Publications|

This paper reports the device design, fabrication and characterisation of 10 kV-class BJT. Manufactured devices have been packaged in single BJT, two paralleled BJTs and Darlington. The static and switching characteristics of the resulting devices have been measured. The BJTs (2.4mm² active area) show a specific on-resistance as low as 198 mΩ·cm² at 100 A/cm² and room temperature for a βMax of 9.6, whereas the same active area Darlington beats the unipolar limit with a specific on-resistance of 102 mΩ·cm² at 200 A/cm² (β=11) for a βMax of 69. Double pulse tests reveal state of the art switching with very sharp dV/dt and di/dt. Turn-on is operated at less than 100 ns for an EON lower than 4mJ, whereas the turn-off takes longer times due to tail current resulting in EOFF of 17.2 mJ and 50 mJ for the single BJT and Darlington respectively when operated at high current density. Excellent parallelisation have been achieved.

The SuperGrid Institute girls are #1 in their category at the Inter-company Challenge!

2019-11-22T09:51:32+01:00September 25th, 2019|Event|

This Tuesday, the 24th of September, the Villeurbanne Inter-company Challenge took place in Parc Miribel, France. Once again, SuperGrid Institute took part in the relay race with 8 registered teams and for the first time, they claimed a place on the podium! Congratulations to Anaïs, Carole, Eleonore and Kirsty, who won first place in the women’s team category with a time of 0h46'35''.

Liquid spray injection in the expansion volume of a CO2 high voltage circuit breaker

2019-09-06T14:02:18+02:00September 6th, 2019|High Voltage Substation Equipment, Publications|

Most high voltage gas circuit breakers (HVCB) in operation use SF6 as the arc interruption medium because of its high dielectric strength and good arc interruption properties. However, SF6 also displays a high global warming potential which motivates the investigation of possible alternatives to this gas.

The EPE flag handover at EPE’19, Genova: SuperGrid Institute takes the reins for EPE 2020 ECCE Europe in Lyon, France

2019-09-09T14:16:14+02:00September 6th, 2019|Conference, Power Electronics & Converters, Supergrid Architecture & Systems|

At the closing session, Abdelkrim Benchaib, General Chairman of EPE’20, received the EPE flag, on stage, from Mario Marchesoni, General Chairman of EPE’19, in the presence of Leo Lorenz, President of the EPE association. During this conference, Abdelkrim Benchaib was also elected as a member of the executive committee of EPE ECCE Europe for 4 more years.

Power Hardware In-the-Loop validation of DC-DC power converter for offshore wind energy

2019-09-02T15:12:38+02:00September 2nd, 2019|Power Electronics & Converters, Publications|

he paper describes the development of a power converter small scale mock-up and a real time model of an off-shore wind farm. A Power Hardware In-the-Loop validation is proposed for a demonstration of grid architecture and control principles. The paper presents the design methodology of the PHIL test bench and underlines the contribution of PHIL in the design flow of power converter development for DC grid application. Experimental results of preliminary PHIL tests are presented.

Influence of the operating frequency on DC-DC converters for HVDC grids

2019-09-02T15:10:02+02:00September 2nd, 2019|Power Electronics & Converters, Publications|

This paper proposes an analytical methodology that allows to assess rapidly the comparison of DC-DC converters. It was applied to evaluate two modular DC-DC structures, one isolated circuit and one non isolated circuit, focusing in the variation of the operating frequency for different DC voltage transformation ratios.

Tuning of Droop Parameters Using Virtual Capacitor Control to Improve Voltage Dynamics

2019-09-02T14:59:48+02:00September 2nd, 2019|Publications, Supergrid Architecture & Systems|

This paper proposes a new approach to tuning voltage droop parameters in an MMC-based multi-terminal HVDC system. Using the new degree of freedom offered by the virtual capacitor control, the transient behavior of the DC voltage can be improved without adverse effects on the connected AC grids.

Comparaison and assessment of implementation techniques for dynamics MMC type models

2019-09-02T14:54:06+02:00September 2nd, 2019|Publications, Supergrid Architecture & Systems|

Modeling Modular Multilevel Converters requires a special attention due to the strong associations between the accuracy and the complexity of models on one hand and the accuracy and simulation speed on the other hand. This paper investigates different implementation techniques for MMC models and gives an overview about their development and rapidity.