Abstract :
Summary form only given, as follows. The present session deals with the Power Quality (PQ) aspects related to transportation and isolated systems. The electric traction plants constitute one of the largest ??? both in terms of extension and power - application of the electric energy, and quality problems are very important for the reliability and the safety of the service. As an example, it is possible to highlight the possible interference between harmonics generated by the traction drives and the signaling systems devoted to the train traffic control. Also the isolated systems ??? as for example the electric power plant on board of ships or aircrafts or the electric supply system on off-shore installations ??? are very susceptible to disturbances on currents and voltages, where the absence of an interconnected network does not provide the mitigation effects. The pamel session, after a general overview on PQ problems in the above mentioned electric energy systems, introduces the traction applications. In particular, the ac 15 kV ??? 16 2/3 Hz supplied systems and the ac 25 kV ??? 50/60 Hz ones are relevant to high-speed trains, while the dc 1.5 kV concerns the metro-transit services. Then, the PQ evaluations on ships and aircrafts are presented and discussed both in terms of negative effects description and propagation analysis in order to provide useful and effective protections. A record of the panel discussion was not made available for publication as part of the conference proceedings.
