1 IEEE Traction Power Subcommittee for Rail Transit Meeting March 25th & 26th, 2015 Joint Rail Conference and Valley Transportation Authority SAN JOSE CALIFORNIA, USA Ramesh Dhingra, P.E. Systems Design Manager Valley Transportation Authority San Jose, CA
2 VTA-LRT YARD SUBSTATION 3 MW UNIT Photos
VTA-LRT YARD SUBSTATION 3 MW UNIT 3 Photos
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8 VTA’s Silicon Valley Berryessa Extension (BART Systems) Project
What are BART Systems? 9 Traction Power Delivery of Power to the Trains Automatic Train Control Train Operator / Protection Speed Control Mechanism Communications Telephones, CCTV, Revenue Collection, etc. Train Status to Patrons/Central Control 9
SVBX Traction Power System Overview To PG&E 3 High Voltage 115 kV Line Substations WSX SVRT HVS SRC 34.5 kV Subtransmission SWS SWA SKR SRR SME SHO 1000 V DC To PG&E 115 kV Line HVS SMR 6 Traction Power Substations SBE 10
SVBX Traction Power Components 2 High Voltage Substation 6 Traction Power Substations – Transformer-Rectifier units step down to 1000 V dc – 34.5 kV, 1000 V dc Breakers – DC Cables feed 1000 V dc Contract Rail – Running Rail serves as the return Contact Rail (3 rd Rail) provides power to BART 11
SVBX Traction Power System Modeling 12
SVBX SV BX Tr Trai ain n Co Cont ntro rol l Ov Over ervie view TRAIN CONTROL HOUSE WARM SPRINGS SVBX TRAIN CONTROL ROOM EXTENSION EXTENSION MILPITAS WARM S24 SPRINGS S27 S37 S25 S20 S26 S28 S40 BERRYESSA S44 S45 S55 S50 CROSSOVER TRAIN CONTROL HOUSE ~3000 sqft 13
Automatic Train Control Blocks WSX SVRT S23 S25 S20 S24 S24 S26 TZP ZONE TZB ZONE TM2 S23 S25 P A F SL15 SL16 SL17 SL1 SL2 SL3 SL4 SL5 SL6 SL7 SL8 SL9 SL10 SL1 SL2 SL3 SL4 SW223 S2 SW227 B R B TM1 V D G S1 SW123 SR16 SR17 SL18 SR1 SR2 SR3 SR4 SR5 SR6 SR7 SR8 SR9 SR10 SR1 SL2 SR3 SR4 SW127 H T C TZV ZONE TZC ZONE TRACK CIRCUITS (BLOCKS) - Length varies by location, 40-1100 feet. - Current Track Circuits • Use both rails in a current loop • Delimited by current shunts - Voltage Track Circuits • Use a single track and return conductor 14 • Delimited by insulated joints
Simple Track Circuit Operation 15
Simple Track Circuit Operation 16
ATC Speed Control Speed Control - Signals carried through rails at Hundreds of mA - 4 Audio Frequency pairs between 5 and 10 kHz - 8 speed codes: 0, 6, 18, 27, 36, 50, 70, 80 Mph 17
Trackside Train Control Equipment Track Circuits Signal Switch Machine
Track Bumper for the What if… 19
Communication Systems - BARTnet Data Intrusion Detection Video Ventilation Control Panel Closed Circuit Emergency Backup Panel Television Yard Emergency Trips Portal Intrusion Train Control Detection BARTnet Platform Trip Stations Railroad Intrusion Elevator Monitoring Detection Blue Light Stations SCADA Audio PBX Telephones Emergency Telephones Radio System Expansion Fire Telephones Public Address 20
Network Elements 21
BARTnet (Fiber Backbone) 144 SM Fiber TO OCC S24 S28 S44 TO OCC S26 S40 S50 22
BART SVBX Systems Cables 1000V DC Cables (30 miles) Intrusion Detection (7 miles) 34.5 kV Cables UPRR (80 miles) Train Control and Communications Cabling Fiber Optic Cables (110 miles) (130 miles) Total al Cable ble Quant antity ty = 3 350 0 Miles es 23
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