Current Situation and Improvement Measures of Lightning Protection of On-Pole Switching Kiosk for Electrified Railway
Lightning strokes could jeopardize the safety operation of on-pole switching kiosk which is a novel traction power supply facility,there are currently no document study the lightning protection of it.The high voltage caused by direct lightning strike can be absorbed by the surge arresters on the incoming outgoing lines and catenary connection point.Secondary integrated automation devices are threatened through capacitive coupling,inductive coupling and grounded potential rising by high current that lightning striking the grounded part of on-pole switching kiosk causes.With 2-layer iron shielding box installed,lightning wave current threat to automation devices is effectively reduced.Thus current lightning protection measures are generally effective.If sufficient project budget is provided,installing extra shielding wire and extra SPD on controlling circuit could better protect on-pole switching kiosk from lightning strikes.
万方数据
维普
