SuperGrid Institute hosts the 11th Quarterly review of NanocompEIM 2

2019-07-25T17:33:19+02:00July 25th, 2019|High Voltage Substation Equipment, HVDC Cable Systems|

Since October 2016, SuperGrid Institute has been involved in the NanocompEIM 2 project. The goal of the project is to develop nanocomposites (Nanocomp) for electrical insulation materials (EIM) in order to reduce CO2 emissions and improve system reliability and availability. Financed at 50% by Innovate UK, a government organisation dedicated to research and innovation in the United Kingdom, the overall budget of the project is around 1M£ (1.1M€).

Study of convective condensation in a thermosiphon loop

2020-01-16T14:10:10+01:00July 24th, 2019|Power Electronics & Converters, Publications|

In this article, we focus on the condenser of a loop thermosiphon designed to cool power electronic component. The objective here is to condense Novec 649, our chosen working fluid for this loop. It is a fluid recently developed by 3M, which is known for having low environmental impact and non-flammable. We first present a theoretical analysis with the calculation and the hypotheses leading to the design of the multi-tubular condenser. Then we present a full size thermosiphon built for experimental validation. A discussion then addresses some of the design hypotheses. Three main parameters are studied : the tilting angle of the condenser (from horizontal to vertical orientations), the temperature of the coolant and finally the mass flow effect at different saturation temperatures. In our setup, we dissipate up to 2.4 kW at the evaporator level. The produced vapor is then condensed in the heat exchanger using cold water flowing at countercurrent. A number of measurements are made via thermocouples and pressure sensors located at both ends of the condenser to measure the average heat exchange coefficient.

SuperGrid Institute collaborates with Edouard Branly School’s undergraduate students for their end of year project!

2019-09-17T16:52:23+02:00July 18th, 2019|All|

Last year, SuperGrid Institute signed a framework agreement with the Digital Department of Edouard Branly School with the aim of developing educational modules in the field of electrical engineering. This year for their final project the undergraduate students from the Digital Department worked on an interactive learning application based on High Voltage Direct Current cable systems and junctions. The final project counts for a significant proportion of the students’ overall credits for the year.

Michel MERMET-GUYENNET’s keynote speech at PEDS 2019

2019-07-12T14:49:20+02:00July 12th, 2019|Conference, Power Electronics & Converters|

This Tuesday the 10th of July, Michel MERMET-GUYENNET presented a keynote speech at the 13th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2019) in Toulouse, following the invitation of Bernado COGO from the Antoine de Saint Exupéry Institute of Technology (IRT Saint Exupéry). In his paper, Michel MERMET-GUYENNET presented power electronics technologies for MV and HV grids.

SuperGrid Institute’s participation at AGP21

2019-07-12T14:38:21+02:00July 9th, 2019|All|

The Association Grand Projects 21 – Major Programmes and Projects for the 21st Century (AGP21) met this Thursday in Versailles to discuss the development of interconnected electricity networks on a global scale. SuperGrid Institute was invited to present its vision and discuss the appeal of multi-terminal HVDC technologies in the design and construction of future energy highways. The subsea node concept developed at SuperGrid Institute was also introduced as an essential building block for extending offshore networks and integrating renewable energies on a wide-scale.

Phd Priscillia DANIEL “Electrical properties study of cross-linked polyethylene insulated cables in presence of gaseous cavities aged under DC or DC with harmonic voltages”

2019-07-09T16:00:23+02:00July 5th, 2019|High Voltage Substation Equipment, HVDC Cable Systems, Phd|

This study aims to examine possible impact of these harmonics in presence of microcavities. Depending on their size and on the electrical field, partial discharges (PD) can occur in these microcavities. Two types of cables have been aged: a medium voltage AC (MVAC) cable with millimetric cavities induced artificially and a model cable with an HVDC XLPE grade.