Study of Turn-to-Turn Electrical Breakdown for Superconducting Fault Current Limiter Applications

2018-11-06T16:01:51+00:00November 2nd, 2018|High Voltage Substation Equipment, Publications|

The rational insulation design of a resistive superconducting fault current limiter (r-SCFCL) requires data gathered from experimental setups representative of the final apparatus. Therefore, an experimental study was performed to characterize the electrical breakdown (BD) of liquid nitrogen (LN2) in the peculiar conditions of a quenching superconducting device.

Electrical properties of epoxy systems based on ionic liquids

2018-11-07T16:13:21+00:00October 12th, 2018|High Voltage Substation Equipment, Publications|

In accordance with their interesting properties, ionic liquids (ILs) have attracted in the recent years a great interest in the material field. Recently, few authors have demonstrated the reactivity of ionic liquids towards epoxy in order to form new epoxy-based networks...

PhD Etienne OUSS “Characterization of Partial Discharges and Defect Identification in High-Voltage Direct Current GIS”

2018-10-08T14:41:48+00:00September 25th, 2018|All, High Voltage Substation Equipment, Phd|

This thesis aimed to characterize partial discharges in DC gas-insulated substations, and to develop an automatic defect identification tool. The first step of this work was the development of a partial discharge measuring bench. The complete study has been performed in a GIS section, so that the results can be directly applied to industrial equipment.

Models of AC and DC cable systems for technical and economic evaluation of offshore wind farm connection

2018-09-03T10:30:20+00:00September 3rd, 2018|High Voltage Substation Equipment, HVDC Cable Systems, Publications|

Accurate cable modeling is a recurrent issue for electric architecture evaluation and design, especially in specific contexts, like offshore wind farms. This paper proposes optimal analytical cable models for the technical and economic assessment of offshore wind generation systems.

Space Charge Measurements for HVDC GIS Spacer using the Thermal Step Method

2018-09-11T14:29:58+00:00August 31st, 2018|High Voltage Substation Equipment, Publications|

High voltage direct current (HVDC) technologies are currently emerging to develop new energy transmission networks able to integrate renewable energy sources with remote locations from consumers. Gas Insulated Substations (GIS) have been widely used in alternating current (AC) transmission due to their low footprint and high reliability.

Uncertainty Quantification for the Eulerian-Lagrangian simulation of evaporating sprays

2018-08-24T10:34:21+00:00July 26th, 2018|High Voltage Substation Equipment, Publications|

Evaporating sprays can be almost routinely simulated using an Eulerian-Lagrangian approach which relies on a RANS modeling of the continuous phase and a Lagrangian description of the discrete phase, including a turbulent dispersion model to express the effect of turbulent fluctuations within the carrier phase on the spray particles and an evaporation model for the spray droplets.

An injection molding press for our Chemistry & Materials test platform

2018-08-09T17:44:00+00:00July 13th, 2018|High Voltage Substation Equipment, HVDC Cable Systems|

With a new semi-automatic injection mixer and an injection molding press, the material characterization and the processing of our samples will take less time – close to industrial production thanks to the Automatic Pressure Gelation (APG) method.

High Voltage Electrical Properties of Epoxy / h-BN Microcomposites

2018-08-22T09:40:27+00:00July 4th, 2018|High Voltage Substation Equipment, Publications|

Two high voltage properties – DC conductivity and AC breakdown strength – of epoxy composites filled with 30 wt% of micron sized hexagonal boron nitride (h-BN) are discussed in comparison to neat epoxy.

Testing phase after installation of SuperGrid Institute’s hyperbaric vessel

2018-08-09T17:44:02+00:00June 28th, 2018|High Voltage Substation Equipment, HVDC Cable Systems|

Our 10 tones, six meters long, hyperbaric vessel has been installed at our premises and is now going through final tests before commercial use.