Optimisation des pertes par commutation dans un convertisseur modulaire multiniveaux
Optimisation des pertes par commutation dans un convertisseur modulaire multiniveaux [...]
A Comparative Assessment of […] for Modular Multilevel Converter
Thanks to scalability, performance and efficiency, the Modular Multilevel Converter (MMC), since its invention, becomes an attractive topology in industrial applications such as high voltage direct current (HVDC) transmission system.
A Novel Modular Multilevel Converter Modelling Technique Based on Semi-Analytical Models
In this work, a novel dynamic models for MMC is proposed. The proposed models are intended to simplify modeling challenges related to the high number of switching elements in the MMC. The models can be easily used to simulate the converter for stability analysis or protection algorithms for HVDC grids.
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 HVDC Application [...]
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.
