Nos publications scientifiques
Full-selective protection strategy for MTDC grids […] DC circuit breakers
A novel protection strategy for multi-terminal high voltage direct current (HVDC) grids based on the implementation of breaking modules (BM) with both limiting and breaking capabilities will be presented. It incorporates a resistive-type superconducting fault current limiter (SFCL) in series with a mechanical DC circuit breaker (DCCB). The proposed arrangement of BMs allows an intrinsic selective fault identification criteria based on the quenching of the SFCL. The fault current limitation reduces the breaking capability, speed and energy requirements for the DCCB. Furthermore, a continuous grid operation can be assured by adding DC inductors and capacitors, assuring a constant power flow during and after the fault event. In this paper, a primary protection scheme is conceptually described and off-line simulation studies performed in EMTP-RV® are discussed.
A Review of Modular Multi-Level Converter (MMC) Modeling for HVDC Application
A Review of Modular Multi-Level Converter (MMC) Modeling for [...]
Hysteresis modelling of a medium frequency single-phase transformer
The article describes a feedback Preisach hysteresis model equivalent circuit implementation of a medium frequency single-phase transformer being a part of a high power and high efficiency DC-DC converter.
EPF 2017 “Influence of size distribution […] high voltage epoxy insulators”
Epoxy resins crosslinked with acid anhydride hardeners are widely used in high voltage insulation. They have excellent dielectric, electrical and mechanical properties up to relatively high temperatures. However, neat epoxy systems exhibit low thermal conductivity and unsuitable coefficient of thermal expansion (CTE) when used with metallic materials such as high voltage conductors.
EPF 2017 “Influence of size distribution […] high voltage epoxy insulators”
Epoxy resins crosslinked with acid anhydride hardeners are widely used in high voltage insulation. They have excellent dielectric, electrical and mechanical properties up to relatively high temperatures. However, neat epoxy systems exhibit low thermal conductivity and unsuitable coefficient of thermal expansion (CTE) when used with metallic materials such as high voltage conductors.
APEC 2017 “Robustness of SiC MOSFET under Avalanche Conditions”
This paper presents the experimental evaluation of SiC MOSFETs from different manufacturers operated in avalanche.
SimHydro 2017: Choosing the right model in applied hydraulics
This paper focuses on the set up and the validation of a numerical model for the analysis of the flow in reversible Francis pump-turbines in the S-Shape region. For such operating conditions the flow inside the pump-turbine is characterized by highly unsteady flow separations and complex rotor/stator interactions.
SimHydro 2017: Choosing the right model in applied hydraulics
This paper focuses on the set up and the validation of a numerical model for the analysis of the flow in reversible Francis pump-turbines in the S-Shape region. For such operating conditions the flow inside the pump-turbine is characterized by highly unsteady flow separations and complex rotor/stator interactions.
Power Electronics and Applications (EPE’16 ECCE Europe)
The paper presents a tool for technical and economic assessment of offshore wind power connecting architectures; they highly influence cost effectiveness of offshore wind generation, particularly when power electronic converter based transmission technologies and long distance transmission cables are employed.
Surface charge measurement on epoxy spacer in HVDC GIS/GIL in SF6
The design of reliable high voltage equipment remains a challenge nowadays. The surface charge accumulation at gas/solid interface is a major problem of HVDC GIS/GIL. The electric field can be distorted and the dielectric strength of the system can be thus reduced dramatically due to surface charges.
