PhD Loriane DESMARS « Study of electrical and thermal properties of epoxy-anhydride composite materials for high voltage insulation »

2019-04-12T10:42:28+00:00avril 2nd, 2019|Appareillage électrique haute tension, Phd, Systèmes de câbles & jonctions HVDC|

The work presented in this manuscript has been motivated by the necessity to develop more efficient electrical insulating materials compared to commercially available ones. An epoxy-anhydride matrix filled with micron sized alumina, often used to produce GIS solid insulators, has been used as a reference for this study.

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

2019-01-10T10:06:54+00:00septembre 3rd, 2018|Appareillage électrique haute tension, Publications, Systèmes de câbles & jonctions HVDC|

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.

Discharging micro cavities and electric field enhancement due to cavities in HVDC XLPE cables

2018-11-12T09:54:29+00:00août 31st, 2018|Publications, Systèmes de câbles & jonctions HVDC|

This paper presents simulation and calculation results of electric field enhancement due to various cavity shapes carried out on polymeric high voltage direct current (HVDC) cables. Two aspects are considered: partial discharges (PD) in microcavities and field enhancement factor under DC.

An injection molding press for our Chemistry & Materials test platform

2018-11-12T10:09:14+00:00juillet 13th, 2018|Appareillage électrique haute tension, Systèmes de câbles & jonctions HVDC|

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.

Testing phase after installation of SuperGrid Institute’s hyperbaric vessel

2018-11-12T10:09:36+00:00juin 28th, 2018|Appareillage électrique haute tension, Systèmes de câbles & jonctions HVDC|

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

Design of a 4-Phase Intercell Transformer Converter for a Space Charge Measuring System

2018-11-09T17:42:29+00:00février 22nd, 2018|Publications, Systèmes de câbles & jonctions HVDC|

This paper presents the design of a power electronics converter to produce strong current pulses (about 400A) in the core of a HVDC cable in order to use the thermal step method to evaluate the ageing state of the dielectric component. The described converter uses a magnetic coupler with intercells transformers and is current controlled. Index Terms—magnetic coupler; intercell transformer; high current pulses; thermal step method; dielectrics.

A novel hyperbaric vessel for SuperGrid Institute

2018-11-09T17:42:17+00:00janvier 29th, 2018|Appareillage électrique haute tension, Systèmes de câbles & jonctions HVDC|

Since 2016, SuperGrid Institute’s program 4 has intensely worked on the specification of a test platform with the capability to go up to 40bars of internal pressure and validate subsea node, a SuperGrid Institute concept for offshore meshed networks. Beside its imposing size, the particularity of this platform is that it allows combined testing functions on subsea high-voltage cable systems including water pressure, di