Nos publications scientifiques
SFCL‑based full-selective protection strategy for multi-terminal HVDC grids: A case study
A protection strategy for high voltage direct current grids using superconducting fault current limiters as main protection component is presented in this work.
A protection strategy for multi-terminal hvdc grids based on mechanical dc circuit breakers
A protection strategy for multi-terminal HVDC (MTDC) grids based on AC/DC converters without fault blocking capability such as half-bridge MMC converters is presented in this paper.
Surge and extended overvoltage testing of HVDC cable systems
In this contribution we give a short status update of the Cigré JWG B4/B1/C4.73. This joint working group deals with investigating the surge and extended overvoltage testing of HVDC cable systems. We present a historic overview over the standardization situation for HVDC cable systems.
Surge and extended overvoltage testing of HVDC cable systems
In this contribution we give a short status update of the Cigré JWG B4/B1/C4.73. This joint working group deals with investigating the surge and extended overvoltage testing of HVDC cable systems. We present a historic overview over the standardization situation for HVDC cable systems.
Technical and economic analysis of the R-type SFCL […] in HVDC grids
Mainly used in AC grids, resistive type superconducting fault current limiters may be still more interesting for DC systems due to their capability to reduce high short circuit currents appearing in case of DC cable fault. This limiter reduces the breaking capability, speed, and energy requirements of the required DC circuit breaker allowing the implementation of electro mechanical breakers for fault current interruption. These breakers have lower breaking capability, on load losses, and investment costs in comparison with hybrid circuit breakers based on power electronics. This paper presents a technical and economic analysis of a superconducting fault current limiter used in a radial three terminal high voltage DC grid to protect a cable link. Based on simulation studies using an electro magnetic transient program, an effective system protection will be demonstrated with special attention to the continuity of power flow through healthy parts of the grid.
Thermal Management Optimization of a 5 MW Power Electronic Converter
High Voltage Direct Current (HVDC) is a replacement of the existing Alternating Current (HVAC) solutions for the transport of electricity using underwater cables. An example is the connexion of off-shore wind turbines to the electrical network...
Thermal Management Optimization of a 5 MW Power Electronic Converter
High Voltage Direct Current (HVDC) is a replacement of the existing Alternating Current (HVAC) solutions for the transport of electricity using underwater cables. An example is the connexion of off-shore wind turbines to the electrical network...
Protruding Ceramic Substrates for High-Voltage Packaging of Wide-Bandgap Semiconductors
With the development of wide bandgap semiconductors, voltage ratings of 10kV and more become realistic. As a consequence, it is now mandatory to propose a suitable packaging. Ceramic-metal substrates are an established technology for voltages up to 3.3kV, but they exhibit some weaknesses for higher voltages.
SiC power devices packaging with a short-circuit failure mode capability
The failure mode of press-pack-type packages dedicated to SiC devices is experimentally analyzed in order to investigate their use for HVDC applications. Single SiC Schottky diode samples have been submitted to short-circuit conditions and continuous current flow test.
A multi-vendor protection strategy for HVDC grids based on low-speed DC circuit breakers
A protection strategy for Multi-terminal HVDC (MTDC) grids based on AC/DC converters without fault handling capability such as half-bridge MMC converters is presented in this paper. The key components of the proposed strategy consist of DC breakers located at each converter station DC side and at each transmission line (overhead line or cable) end, all of them based on low-speed mechanical DC breaker technology with no fault current limiting devices.
