Commuter Rail AC Electrification Load-Flow Simulation Report - RTD

Commuter Rail AC Electrification Load-Flow Simulation Report Revision 1
8.0 ELECTRICAL SYSTEM SIMULATION RESULTS
8.1 GENERAL
The morning and evening rush-hour operation is assumed to be the same, i.e., the same train
consists at the same headways, as presented in Table 1 above, will operated in both periods of
time. Therefore, the results of the study apply to both rush-hours.
8.2 STUDIES PEFORMED
The following two sets of studies were performed:
• Set 1 – Two traction power transformers in Sandown substation and two traction power
transformers in Argo substation
o All systems in service
o Argo substation out of service
o Sandown substation out of service
• Set 2 - Two traction power transformers in Sandown substation and one traction power
transformer in Argo substation
o All systems in service
o Sandown substation out of service
It was not necessary to run the Argo substation out of service case in the study Set 2, as the
results would be the same as in the study Set 1.
8.3 SYSTEM VOLTAGES
The minimum train (pantograph to running rail) voltage for each commuter rail line during all
equipment in-service and for contingency operation of each substation out-of-service are shown
in the following Table.
Table 10 -
System Voltages
System Condition
2 Transformers in Sandown,
2 Transformers in Argo
East
Corridor
Gold
Line
Minimum Voltage (kV)
North
Metro
Corridor
2 Transformers in Sandown,
1 Transformer in Argo
East
Corridor
Gold
Line
North
Metro
Corridor
All Equipment-In-Service 24.5 24.8 24.5 24.4 24.4 24.1
Argo Substation Outage 24.1 24.0 23.9 24.1 24.0 23.9
Sandown Substation Outage 24.0 24.3 24.0 23.9 24.1 23.9
Voltage profiles along each corridor are presented in Appendices C, D, E, F and G.
8.4 CONDUCTOR CURRENTS
Normally, conductor temperatures vs. time are derived on transient basis using the one-second
output from the computer load-flow simulations. However, since the RMS currents were well
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