Previous research activity revealed that a new measurement system, based on a phototube sensor, can detect break arcs between the pantograph and the contact line. Test runs were performed on board of an ETR500, a high-speed train of Italian Railways, with a double pantograph and an acquisition system on board of a measurement coach. Measurement apparatus has been modified: a second phototube sensor has been mounted on the top deck of the locomotive, for detecting both the entering break arcs and the exit break arcs. In such a way the arcs are revealed more precisely and the ?twin phototube sensor? increases its reliability. As a second step an analysis of the harmonics in the current line has been performed, revealing a meaningful correlation between the occurrence of break arcs and the harmonics. A statistical analysis of the data has revealed the effectiveness of the proposed sensor for detecting the losses of contact, in order to evaluate and test the performance of running pantographs and of the contact wires. The correlation between break arcs and harmonics in the line currents was evidenced via an accurate analysis of data collected during high-speed runs. A relevant outcome of the research is the kilometre-to-kilometre detection of arcs. Examples of distributions per kilometre in case of losses of contact are computed and plotted.
Pantograph-catenary monitoring: correlation between break arcs and harmonics in the traction currents
LANDI, ALBERTO;SANI, LUCA;
2001-01-01
Abstract
Previous research activity revealed that a new measurement system, based on a phototube sensor, can detect break arcs between the pantograph and the contact line. Test runs were performed on board of an ETR500, a high-speed train of Italian Railways, with a double pantograph and an acquisition system on board of a measurement coach. Measurement apparatus has been modified: a second phototube sensor has been mounted on the top deck of the locomotive, for detecting both the entering break arcs and the exit break arcs. In such a way the arcs are revealed more precisely and the ?twin phototube sensor? increases its reliability. As a second step an analysis of the harmonics in the current line has been performed, revealing a meaningful correlation between the occurrence of break arcs and the harmonics. A statistical analysis of the data has revealed the effectiveness of the proposed sensor for detecting the losses of contact, in order to evaluate and test the performance of running pantographs and of the contact wires. The correlation between break arcs and harmonics in the line currents was evidenced via an accurate analysis of data collected during high-speed runs. A relevant outcome of the research is the kilometre-to-kilometre detection of arcs. Examples of distributions per kilometre in case of losses of contact are computed and plotted.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
