Infrastructure Projects
Crossrail Programme
Modelling &
Electrification
James Greatbanks – Designated Project Engineer
NR Crossrail Traction Power Supply Upgrade
jgreatba@bechtel.com
1
Crossrail
• New journey opportunities and 10% increase in rail capacity
• Up to 24 tph, each train 200m carrying up to 1500 passengers
• £14.9bn contributing £42bn in benefits
• Network Rail delivering £2.3bn enhancements:
– 28 station upgrades
– Electrification and power supply upgrade
– Signalling and telecom renewals
– Grade separation and junction improvements
2
Electrification and PSU
• 85 stkm Series 1 OLE
• 2 x 400kV supply points
• Autotransformer feeding: Stratford to Shenfield (30km) & Paddington to
Maidenhead (40km)
• £200m
KENSAL GREEN
400kV Supply Point
PUDDING MILL LANE
400kV Supply Point
Gidea Park
SATS
Slough ATS
Hayes SATS
Maidenhead
MPATS
Shenfield
MPATS
Ilford SATS
West
Ealing
ATS
Westbourne
Park
ATS
Stepney
Green
SATS
Plumstead ATS
3
Electrification Modelling
• Supply point loads
• Earth leakage
• Equipment loading
• Electrolytic corrosion
• Voltage profile
• Thermal loads
• Rail voltage
• Resonance
• Induced voltage
• Screening
• Stray current
• Conducted interference
• Staging / phasing
• Radiated emissions
• Import and export
• Train performance
• Failure modes
• Earth potential rise
4
Project Lifecycle
GRIP – Governance for Railway Investment Projects
Timetable /
Outputs
System
Design
Ratings
Staging
Commissioning
Hazard Management
5
System Design
400kV Grid
Standards
+ Policy
System Design
Route
System Design
Options:
- E&B Design
- HV Equipment
-OLE Sectioning
-Telecoms
-Signalling
Rolling Stock
Timetable
Outline Design
AIP
Detailed Design
6
System Design - Timetable
7
Time of Day
23
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0:
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22
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21
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20
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Half Hour AverageLoad(M
VA)
65MVA
19
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18
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17
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16
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15
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14
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13
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12
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11
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10
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09
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08
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07
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06
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05
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04
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03
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02
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01
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00
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00
System Design - Demand
67MVA
30 MVA
Kensal Green Supply Point
100.0
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
8
System Design – Outputs
9
System Design – Rail Voltage
10
System Design – S&T Circuits
11
AC/DC: South East Section
• 2km
• Parallel AC and DC lines
• New station
• Engineering Connection
• Corrosion Rates > 3000 years
• Negligible 50Hz
• No requirement for screening conductor
• No VLDs or OLE mast insulation
• Isolation tx at Abbey Wood station
• One new rectifier
12
Hazard Specific Modelling
• Inductive and conductive coupling to third parties
– London Underground
– DLR
– Heathrow baggage and air side services tunnels
• ATF cables
• Mark 3B OLE
• Reed track circuits
• Depot bonding
• Harmonic Resonance
13
Third Parties
•Joint Crossrail Ltd / Network Rail study
•Multi-frequency coupling
•Tailored to ‘victim’ equipment
14
Third Parties
15
Third Parties
16
ATF Cable
• Crossrail ATF is 12% cable
• Δ system design / outline design
• Earthing ATF cable at both ends
• ATF cable and S&T separation
ATF / S&T Separation (m)
6
5
4
3
2
1
0
0
5
10
15
20
25
Distance from Paddington (km)
30
35
40
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Summary
• System Design as early as possible
• Change is inevitable, so build in allowances
• Change to scheme outputs = big impact
• Modelling required throughout the project lifecycle
• Engage sensitive third parties
• Use system boundaries rather than contract boundaries
• Limited number of suppliers
• Shortage of resource
• Modelling £ < Testing £££
18