Commuter Rail AC Electrification Load-Flow Simulation Report - RTD

Commuter Rail AC Electrification Load-Flow Simulation Report Revision 1
below the ampacity of the overhead system conductors, as shown in Table 11, and annealing of
the conductors is highly unlikely, the predicted conductor temperatures were not calculated.
Table 11 - Conductor Ampacities and RMS Currents – All System In Service, Two
Transformers in Sandown Substation, Two Transformers in Argo Substation
Substation
Sandown
Argo
Feeder
Approximate Ampacity (A) Maximum RMS Current (A)
Feeder Catenary Feeder Catenary
Track 1-West
3.4 23.2
Track 2-West 3.4 36.0
Track 1-East 23.8 75.6
Track 2-East 23.8 83.8
730 870
Track 1-West 9.4 57.6
Track 2-West 9.4 53.0
Track 1-East 38.6 70.2
Track 2-East 38.6 77.2
Results for two transformers in Sandown substation, and one transformer in Argo substation are
not presented, as the results are not substantially different from the results shown.
8.5 SUBSTATION POWER DEMANDS
The substation transformer power demand for Sandown and Argo substations are shown in the
following Tables. In order to define the transformer continuous and overload ratings, the onesecond
power demands were averaged over 2-hour, 1 hour, 15-minute, and 1-minute time
intervals, as shown in Tables 12 through 14. For the power utility billing interval, 15 minutes,
the power factor is also given.
02/27/2009 FRSC Page 24 of 250