Publications Archives - Page 27 sur 33

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

Communications2018-09-03T10:00:15+02:00February 22nd, 2018|Publications, Systèmes de câbles haute tension|

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.

Optimal Supercapacitor Pack Sizing for Modular Multilevel Converter with Integrated Energy Storage System

Communications2021-08-11T17:00:36+02:00February 20th, 2018|Electronique de puissance & convertisseurs, Publications|

In the new electrical grids, series/parallel converters architectures can be considered for medium and high voltage power conversion. Dual Active Bridge (DAB) topology is a serious candidate to be implemented within these converters.

Numerical investigations of ReBCO conductors with high limitation electric field for HVDC SFCL

Communications2021-08-11T17:00:43+02:00February 14th, 2018|Appareillage électrique haute tension, Publications|

Superconducting fault current limiters (SFCL) are already in operation in alternative current medium voltage applications and their use in HVDC grids is very promising due to their capability of reducing high short-circuit currents.

Comparison between numerical and analytical methods of AC resistance evaluation of medium frequency transformers : validation on a prototype

Communications2021-08-11T17:00:50+02:00January 24th, 2018|Electronique de puissance & convertisseurs, Publications|

In the future, medium-frequency transformers (with a frequency range of 5-100 kHz) will be major components in dc-dc converter applications, for both medium-voltage direct current and high-voltage direct current networks.

Analysis of voltage and current unbalance in a multi-converter topology for a DC-based offshore wind farm

Communications2021-08-11T17:00:59+02:00January 24th, 2018|Electronique de puissance & convertisseurs, Publications|

High Voltage Direct Current (HVDC) is increasingly being used for electric power transmission over long distances.

State of the art of gate-drive power supply for medium and high voltage applications

Communications2021-08-11T17:01:09+02:00January 24th, 2018|Electronique de puissance & convertisseurs, Publications|

Gate-drive power supplies in medium voltage and high voltage direct current (MVDC / HVDC) applications require medium to high voltage insulation.

Influence of Electric Field on Space Charge Distribution in Alumina-filled Epoxy Resin for Application in HVDC GIS

Communications2021-08-11T17:01:32+02:00December 11th, 2017|Appareillage électrique haute tension, Publications|

The present paper deals with space charge in alumina filled epoxy resin for HVDC applications.

Evolution of the Cathode Spot Distribution in an Axial Magnetic Field Controlled Vacuum Arc at Long Contact Gap

Communications2021-08-11T17:01:41+02:00December 11th, 2017|Appareillage électrique haute tension, Publications|

The evolution of the cathode spot distribution is an important aspect of the behavior of vacuum arcs controlled with an axial magnetic field.

Measurement and Analysis of Partial Discharges in HVDC Gas Insulated Substations

Communications2021-08-11T17:01:51+02:00December 11th, 2017|Appareillage électrique haute tension, Publications|

The measurement of Partial Discharges (PD) in Gas Insulated Substation (GIS) enables to identify and analyse various types of defects that can result in electrical breakdown.

Effective ionization coefficients and limiting field strength of Fluoronitriles-CO2 mixtures

Communications2021-08-11T17:02:08+02:00December 11th, 2017|Appareillage électrique haute tension, Publications|

The density normalized Effective ionization coefficients and critical breakdown electric field of the Heptafluoro-iso-butyronitrile (Fluoronitriles), and Fluoronitriles-CO2 mixture are investigated using the steady state Townsend (SST) experimental setup, over a range of the density normalized critical electric field (E/N) from 200-1066 Td (E is the electric field and N the gas density).

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