MV/LV DC distribution grids
Dipl.-Ing. Wolfgang Voß, Siemens Energy
Why MV/LV DC distribution grids in marine/offshore and land-based applications can benefit from each other. LV DC distribution grids have been used successfully in ships since 2008.
MVDC distribution system has also been developed for larger classes of ships, which can be combined with the proven LVDC system.
DC distribution grids have become established on ships because they offer much greater flexibility and frequency-independent operation. This allows generator sets to be operated at variable speeds, significantly reducing fuel consumption and CO2 emissions. The shore power supply gets simpler and complex converter solutions are not required on land. Significant space savings are also achieved by eliminating transformers and switchgear. Safety and resilience can also be improved by implementing a DC distribution network.
The rapid decline in electrification also requires new approaches to be taken in land-based applications. The AC grid infrastructure is the most challenging part for energy transition.
Coming from marine the first point of interaction would be within the harbor infrastructure for getting the required power connections for cold ironing or charging of the vessels.
Here, MVLVDC distribution networks can also help to overcome the challenges of electrification, de-load and support the existing AC infrastructure. The experience gained and the existing components from marine applications complement the new applications well.
The presentation will compare DC solutions from the marine sector with future DC applications in the offshore or land-based sectors, such as port charging infrastructure, PtX, PV+battery, data centers, industry, or in the DSO distribution network sector, and highlight synergies.
The presentation will also discuss the contribution that DC distribution grids can make to improving resilience. Finally, it offers a good initial overview of possible DC distribution grids in, and above all, outside of naval applications and highlights the sharp increase in new potential applications for DC distribution grids.
