TECHNOLOGIES WITH POWER CONVERTER-GRID CONNECTION IN THE ELECTRIC ENERGY SUPPLY, CONSIDERATIONS CONCERNING THE FUEL-CELL POWER-STATION - OBSERVATIONS REGARDING THE FUEL-CELL POWER-STATION AND THE SUPERCONDUCTIVE MAGNETIC ENERGY ACCUMULATOR

Fuel-cell power stations in the efficiency range of some MW, at presen t still as demonstration plant, may reach in future an important role in the local energy supply. As environmentally acceptable technology w ith high efficiency, an economical use of the fuel cell in the unit co mbined heat and power station is expected. It is conceivable to use th e superconductive magnetic energy accumulator (SMES) as large-scale ac cumulator on a long-term basis, and as medium-scale or small-scale acc umulator on a medium-term basis, too. Both application cases have the grid connection through efficiency electronic power converters in comm on. For this problematic nature, especially interesting in the MW-rang e, the connections with the power converter/grid interaction are prese nted.