Advanced control concept for shoreside power supply of ships

Economical and ecological motives are pushing shoreside power supply by power electronics systems for merchant ships as well as for cruise ships. Also, final tests of on-ship power systems and generation are simplified considerably. Fault scenarios on-ship and within the harbour grid and the variability of the parameters of on-ship distribution - each ship is special, and large consumers or generators are switched on and off - require fast and robust control. Oszillations in the filters ship-side and harbour-grid-side of the power electronics may result from transients - and can be mitigated by the advanced control schemes. The paper introduces the a flux-based control concept and applies it to the typical structure of a shoreside power supply system, verifying excellent characteristics and robustness even under asymmetric fault conditions by simulation. The quality of the simulation results is cerified by comparison to laboratory experiments.