As owner of the quaysides at the Port of Hamburg, the Hamburg Port Authority (HPA) commissioned Siemens AG to construct the corresponding systems. The use of shoreside electricity substantially reduces the emissions of a docked ship. As soon as the electricity is connected, the diesel generators usually used for power on board can be switched off. This reduces not only air pollution and greenhouse gases, but also reduces noise emissions to a minimum.
Shore-side power stations are an effective and sensible solution for emissions-free layovers. They eliminate the emission of nitrogen oxides, sulphur dioxide, soot particles and greenhouse gases while ships are docked. Their workings are technically complex – it is not enough to use a long, thick cable and two plugs; large container ships require as much power as a small city.
Background: in international seaborne transport, approximately 75 percent of all ships are equipped with 60 hertz on-board power systems. Yet only a quarter of all countries’ electrical grids operate on this frequency: Germany, for example, uses 50 hertz. This means the land frequency and on-board frequency must be adapted – a complex undertaking that requires a high degree of safety.