The thinking caps are on this week at SuperGrid Institute with the “Fête de la Science” event! Over the last few days the institute has welcomed four classes of high school students who learnt about the work that we do through fun, interactive activities. This Saturday afternoon, we are opening our doors to the public to round of the week in style! Come along and see us!
The thinking caps are on this week at SuperGrid Institute with the “Fête de la Science” event! Over the last few days the institute has welcomed four classes of high school students who learnt about the work that we do through fun, interactive activities. This Saturday afternoon, we are opening our doors to the public to round of the week in style! Come along and see us!
Every year the French chapter of IEEE Power & Energy Society (PES), in collaboration with SEE (Society of Electricity, Electronics and Information and Communication Technologies), recognises outstanding PhD theses and hands out the “outstanding engineer of the year” prize at an annual evening ceremony. This Wednesday the 9th of October, Ahmed Zama was honoured with the IEEE “Doctorate Award” for his thesis work on “Modeling and Control of Modular Multilevel Converters (MMCs) for HVDC applications”.
Lightning studies are a critical part of any system involving overhead lines. As HVDC technologies develop, new problems and questions arise regarding the lightning performance of HVDC overhead lines. For instance, the installation of two separate HVDC circuits on the same transmission tower may become a popular alternative for the uprating of old AC lines to take advantage of the already existing Right-of-Ways. Double-pole flashovers may be particularly constraining in double circuit HVDC systems, since they could lead to the loss of both circuits at the same time due to the flashover of both poles of the same polarity having the same amplitude at all times (which is not the most likely case in AC systems). This corresponds to a 100% of loss of transmitted power, which could represent a threat for the system stability. This constitutes the main motivation for this work.
Lightning studies are a critical part of any system involving overhead lines. As HVDC technologies develop, new problems and questions arise regarding the lightning performance of HVDC overhead lines. For instance, the installation of two separate HVDC circuits on the same transmission tower may become a popular alternative for the uprating of old AC lines to take advantage of the already existing Right-of-Ways. Double-pole flashovers may be particularly constraining in double circuit HVDC systems, since they could lead to the loss of both circuits at the same time due to the flashover of both poles of the same polarity having the same amplitude at all times (which is not the most likely case in AC systems). This corresponds to a 100% of loss of transmitted power, which could represent a threat for the system stability. This constitutes the main motivation for this work.
Stage dating is back at SuperGrid Institute! Get your CV ready and come along to apply for one, or several, of our internships on Thursday the 24th October at our premises in Villeurbanne (69). Our internship tutors will be available for a whole afternoon, seeking new talents to help us shape the power transmission system of tomorrow!
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.
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.
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''.
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''.
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