This poster describes the DC-DC converter technology intended for Medium Voltage Direct Current grids. The benefits of the proposed technology are highlighted for the DC collector for offshore wind farms.
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.
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.
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.
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.
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
Multi-terminal high voltage direct current (MTDC) grids, or supergrids, are considered an interesting solution to integrate large amounts of renewable power and release congestion of existing AC power grids. Nonetheless, safe and reliable operation of such grids require the development of new DC protection systems.
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.
High Voltage Direct Current (HVDC) is increasingly being used for electric power transmission over long distances.
Gate-drive power supplies in medium voltage and high voltage direct current (MVDC / HVDC) applications require medium to high voltage insulation.
