Commuter Rail AC Electrification Load-Flow Simulation Report - RTD

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Commuter Rail AC Electrification Load-Flow Simulation Report Revision 1 The RR software uses a dynamic performance algorithm for adjusting the trains’ performance based on the instantaneous system electrical loading where most other simulators assume a fixed performance value irrelevant of actual train voltage. RR uses "snapshots" at one second intervals to increment the calculations of vehicle performance and the system electrical load. RR uses the train’s actual voltage and its corresponding current to determine the load on the traction power system. As these values change, the available tractive effort is re-calculated and applied to the performance of the train to determine the trains’ current requirements. This is performed individually for each train on the system at each snapshot. The calculations are modified each time there is a change to the system, and consequently, train locations vary slightly from run to run due to actual performance associated with each train’s actual train voltage. Therefore, each train on the system affects all other trains on the system and visa versa. Each train’s performance is individually calculated based on local conditions and the subsequent location of each train updated. The electrical system is then re-evaluated through a matrix calculation. The result is a more accurate representation of system performance under actual conditions as individual train performance is dependent on both the traction power system and other trains on the system. Train performance may appear to vary run to run, but this is actually representative of total system dynamics that will be seen in service. The simulation output is dependent on operating assumptions such as system population which is determined by headway, train consist, and train departure scheduling. The results presented in this report represent only one possible combination of such operating assumptions. Variable operator behavior, dwell times, passenger loads, and weather or track conditions, along with potential train bunching and special events trains will change actual system performance. Design standards were developed for minimum train voltage to try to allow for real-world performance and operation anomalies since there is no practical way to simulate every possible scenario or situation. 4.2 STUDY PROCEDURE The computer load-flow study simulations were performed in the following steps: • Development of study criteria • Collection of route alignment data, operation data, and train data • Conversion of collected data into computer input data • Trip duration computer runs and development of string charts • Analysis of trip duration and string chart results • Collection of electrical network parameters and system operations data • Conversion of collected data into computer input data • Electrical system computer runs, including: o All equipment in-service scenarios o Contingency conditions such as substations out-of-service 02/27/2009 FRSC Page 14 of 250
Commuter Rail AC Electrification Load-Flow Simulation Report Revision 1 • Analysis of electrical output results. The analysis included the following calculations: o Derivation of train voltage profile along each system route o Calculation of feeder and catenary currents o Determination of substation and autotransformer power demands o Determination of substation and autotransformer power ratings Based on the analysis of the electrical network results, the proposed electrification system conceptual design was verified. 02/27/2009 FRSC Page 15 of 250
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This document contains all RR input
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# Location Distance Grade Speed Sta
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Track Data For Track: East Corridor
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28Jan2009 Track: East Corridor - WB
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Track Data For Track: DUS - IB East
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Track Data For Track: DUS - OB East
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28Jan2009 Track: East Corridor - EB
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28Jan2009 Track: East Corridor - EB
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28Jan2009 Track: Gold Line - EB MP
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Track Data For Track: Gold Line - E
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Track Data For Track: Gold Line - E
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28Jan2009 Track: DUS - IB Gold Line
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28Jan2009 Track: DUS - OB Gold Line
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28Jan2009 Track: Gold Line - WB DUS
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28Jan2009 Track: Gold Line - WB MP
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Track Data For Track: Gold Line - W
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Track Data For Track: Gold Line - S
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Track Data For Track: North Metro -
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28Jan2009 Track: North Metro - SB M
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28Jan2009 Track: DUS - IB North Met
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28Jan2009 Track: DUS - OB North Met
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28Jan2009 Track: North Metro - NB D
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28Jan2009 Track: North Metro - NB M
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28Jan2009 Track: North Metro - Sing
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28Jan2009 Track: North Metro - Sing
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28Jan2009 Substations Substations R
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Data For AC Feeder: East Corridor -
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Data For AC Feeder: Gold Line - Eas
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Data For AC Feeder: North Metro Run
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Speed (mph) TE (lbs) Eff. (dec) 75
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Train 5 Train 6 Train 7 Train 8 Tra
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RR Trains Name Train 1 Train 2 Trai
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Train 10 Train 11 Train 12 Train 13
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RR Trains Name Train 1 Train 2 Trai
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Commuter Rail AC Electrification Load-Flow Simulation Report - RTD

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