Traction power supply for Tri-Met Portland Westside and Hillsboro light rail extensions

摘要: The Tri-Met Westside and Hillsboro Light Rail extensions were opened for revenue service in September, 1998. 18 mile long line extends the existing Banfield Eastside rail from downtown Portland to Hillsboro. Primary power is provided by utilities at 12.5 kV rectified mainline 750 kW traction substations deliver DC trains. alignment includes at-grade street crossings, street-running operation, fully grade separated sections a 3-mile tunnel. This paper provides general description discussion of supply system. major items discussed are: dual primary feeders with automatic transfer supplying tunnel auxiliary systems, substation features, buildings, PLC controls, wayside distribution, testing energization. Also are advantages built-in-place buildings versus pre-fabricated substations. These include integration stations where demand greatest, reduced land costs, "hotel" loads fed thereby simplifying electrical services reducing electric utility construction vicinity stations, resulting overall costs.