Transcript Tram movement calculation (VISION)

Stage 1 – CBD and Sports Precinct
Traction Power System Analysis
for Commonwealth Games
Background data to Stage 1
Combined team of Yarra and Arup engineers
Commenced November 2004
Model simulations commenced beginning April 2005
Pass Assets used in building the model
Simulation tests devised by Yarra Trams
Simulate worst case running conditions for the Games
Ongoing dialogue between Yarra and Arup to resolve data supply
problems
Project Objectives
• Modelling and simulation of the tram operations in the
Melbourne CBD and Sports Precinct
• Assessment of existing traction power network
• Recommend possible improvements and/or upgrades to
allow a safe and reliable 2006 Commonwealth Games
service
Scope of Work Undertaken by Arup
• Gather System and Vehicle Data
• Build Tram Movement Model
• Build Traction Power Model
• Model Power Under Normal and Failure Conditions
• Carry Out Simulation Tests
• Analyse Simulation Results
• Identify Possible Power System Deficiencies
• Report to Yarra Trams
Simulation Software
• Traction power simulation consists of two functions:
Tram movement calculation (VISION)
Power network analysis (OSLO)
• The linkage between these two functions forms the
structure of traction power system simulation
VISION - Tram Movement Simulator
• VISION stands for
Visualisation and Interactive
Simulation of
Infrastructure and
Operations on tram
Networks
• VISION can simulate
Yarra’s extensive tram
network including real time
representation of tram
services throughout the
system
OSLO – Traction Power Simulator
• OSLO stands for Overhead System LOading
• The program was initially produced to predict the
performance of an AC electrified system
• The program has now been developed to predict the
performance of a DC electrified system
Sub R Instantaneous Power - Commonwealth Games Timetable, Normal Feeding
1600
1400
1200
Power (kW)
1000
800
600
400
200
0
07:00:00
07:28:48
07:57:36
08:26:24
Time (hh:mm:ss)
08:55:12
09:24:00
Input Data Supplied by Yarra Trams
• Substation Data
• Traction Power Network Data
• Tram Vehicle Data
• Tram Stop and Timing Point Data
• Track Infrastructure Data
• Timetable Information
• Simulation Scenarios
Typical Output Data From Model
• Tram Pantograph Operating Voltages
• Trolley Wire Current Ratings
• Substation Equipment Ratings
• Feeder Cable Current Ratings
Substation Sb Busbar Voltage Profile - Scheduled Timetable, Normal Feeding
660
650
Voltage (V)
640
630
620
610
600
07:00:00
07:30:00
08:00:00
08:30:00
Time (hh:mm:ss)
09:00:00
09:30:00
Timetable
• Scheduled Daily Timetable
• Modelled between 6:30am to 9:30am
• 310 trams enter the CBD and Sports Precinct
• 20 seconds dwell time at each tram stop
• Commonwealth Games Timetable
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•
•
•
•
Modelled between 6:30am to 9:30am
325 trams enter the CBD and Sports Precinct
20 min. peak running period from 8:00am to 8:20am
90 seconds headways on Flinders St. and Clarendon St.
Modern low floor trams on routes 48, 70, 75, 112, and 96
Simulation Scenarios
• Normal Power Scenario (all substations in service)
• Power Failure Scenario
• Rectifier unit at Crombie Lane substation out of service
• Westgate Freeway substation out of service
• Main feeder at Flinders Street tie substation out of service
• Tram Entry Time Perturbation Approach
•
•
•
•
Used to simulate the real situation on the tram network
20% of trams enter the simulation on time
80% of trams enter the simulation 1 to 59 seconds late
Entry time perturbation can be changed
Simulation Results
• Normal and Failure Scenarios for Scheduled Timetable
and the Commonwealth Games Timetable
• Data processed:
•
•
•
•
•
•
•
Substation Voltages
Substation Loadings
Feeder Cable Currents
Overhead Conductor Currents
Parallel Cable Currents
Tram Pantograph Voltages
Tram Power Loadings
Typical Graphical Outputs – Power Graphs
Sub Wf Instantaneous Power - Commonwealth Games Timetable, Normal Feeding
Substation Wf Instantaneous Power - Scheduled Timetable, Normal Condition
3500
2400
2200
3000
2000
1800
2500
Power (kW)
Power (kW)
1600
1400
1200
1000
2000
1500
800
1000
600
400
500
200
0
07:00:00
07:30:00
08:00:00
08:30:00
09:00:00
Time (hh:mm:ss)
Scheduled Timetable
09:30:00
0
07:00:00
07:30:00
08:00:00
08:30:00
09:00:00
Time (hh:mm:ss)
Games Timetable
09:30:00
Typical Graphical Outputs – Voltage Graphs
Substation Wf Busbar Voltage - Commonwealth Games Timetable, Normal Feeding
Substation Wf Busbar Voltage Profile - Scheduled Timetable, Normal Feeding
660
650
650
640
640
630
Voltage (V)
Voltage (V)
630
620
610
620
610
600
590
600
580
590
570
580
07:00:00
07:30:00
08:00:00
08:30:00
09:00:00
Time (hh:mm:ss)
Scheduled Timetable
09:30:00
560
07:00:00
07:30:00
08:00:00
08:30:00
09:00:00
Time (hh:mm:ss)
Games Timetable
09:30:00
Typical Graphical Outputs – Journey Log Graphs
Journey Log Route 96 (Tram 322) - Commonwealth Games Timetable, Normal Feeding
Journey Log Route 96 Up (Tram 212) - Scheduled Timetable, Normal Feeding
Voltage
Voltage
Power
Power
800
700
700
600
Voltage (V) / Power (kW)
Voltage (V) / Power (kW)
600
500
400
300
200
500
400
300
200
100
100
0
0
0.5
1
1.5
2
2.5
3
Distance Travelled (km)
Scheduled Timetable
3.5
4
0
08:00:00
08:05:00
08:10:00
08:15:00
Time (hh:mm:ss)
Games Timetable
08:20:00
Simulation Results
The analysis suggests:
• The network may require some additional feeder and
parallel cables to accommodate the Commonwealth
Games timetable
• Some adjustments to the tram headways may have to
be made
• Yarra Trams should consider converting the existing
Flinders Street tie substation to a full substation at some
point in the future to improve the power network
reliability
Discussions With Yarra Trams
• Simulation results have been presented to Yarra Trams
• Discussions have been held with Yarra electrical and
power engineers
• Yarra engineers are happy with the model approach and
with Arup’s recommendations
• We need to run the latest version of the Commonwealth
Games timetable
• Confirm possible upgrades to the network