London Infrastructure Development
Robert Kemp
Head of System
Development
UK Power Networks
Stephen Bradley
Head of Major Connections
UK Power Networks
Central Area Supergrid Substations
St Johns Wood
Back Hill
City Road
Hackney
West Ham
West End
City of London
Victoria
Bankside
Wimbledon
New Cross
Central area supply network
St Johns Wood
Back Hill
City Road
Hackney
85%
West Ham
80%
20%
15%
West End
City of London
70%
Victoria
30%
Wimbledon
Bankside
New Cross
EHV (132kV) network enhancements
St Johns Wood
City Road
Back Hill
Hackney
85%
West Ham
80%
20%
15%
West End
City of London
70%
Victoria
30%
Wimbledon
Shorts Gardens
Tunnel
Farringdon
Tunnel
New Cross-Finsbury
Market cable tunnel
Bankside
New Cross
Increased Resilience
+2 SGT’s
2017
St Johns Wood
Back Hill
City Road
Islington
+3 SGT’s
Hackney
2011
45%
60%
20%
West Ham
10%
West End
City of London
20%
50%
15%
30%
Brunswick
Wharf
Victoria
50%
Wimbledon
Bankside
New Cross
+1 SGT 2014
Work in Progress
Schemes in Progress
Substation
Limeburner Lane
Osborn Street
Kingsgate House
Moreton Street 'B'
Fisher Street
St Pancras
Newington House
Townmead Road *
Montford Place 'B' *
New Transformers MVA
Forecast
Existing
no.
rating
Total
Increase Completion
132/11kV
0
3
66
198
198
2015
132/11kV
60
3
66
198
138
2016
132/11kV
0
2
66
132
132
2015
132/11kV
0
2
66
132
132
2014
132/11kV
60
3
33.3
100
40
2015
Total Central District
640
132/11kV
120
3
66
198
78
2017
20/11kV
45
4
25
100
55
2014
66/11kV
45
1
30
30
30
2014
33/11kV
60
2
30
60
60
2013
Total Outter Circle
223
Net new transformer capacity (MVA)
863
Additional Requirements
•
Additional operational sites
•
Continue and enhance co-operation in gaining new
sites within new and existing developments that can
feed out onto the network.
•
Third party consents for tunnels, new sub-station works
and modifications to existing operational sites.
Future: Calshot St Establish 132/11kV Substation
Future: Farringdon satellite 11kV switchboard
Wider EHV Network
Willesden
+1 SGT 2016
Islington
+3 SGT’s 2017
+2 SGT’s
St Johns Wood
Back Hill
City Road
Hackney
2011
Fulham tunnel
White City
West Ham
45%
60%
20%
10%
West End
Millennium
tunnel
City of London
Isle of Dogs
20%
50%
15%
30%
Victoria
Proposed new
Thames X’ing tunnel
50%
Bankside
Pimlico tunnel
VNEB
New Cross
+1 SGT 2014
Wimbledon
Planned +240MVA SGT
capacity 2018
Central EHV Network: Summary
• 860MVA of new transformer capacity by 2016
• Matched by new National Grid supergrid exit capacity
• City of London supply diversity facilitated by the New CrossFinsbury Market cable tunnel
• New resilient 33kV network to accommodate large point loads
• Planned new installations at Calshot St 86MW firm & Farringdon
• Further new substations being designed
• Further sites required, obtaining consents in a timely way.
33kV Network Delivery
• Dedicated Project Team to deliver the 33kV feeder
infrastructure and dedicated services
• Frequent Client Liaison
–Including Progress Reporting
–Project Plans
–Spend Profiles
–Risk Management
• Close collaboration and assistance from CoL and TfL.
33kV network feeder spines
Central London – 33kV network
Comprises of 3 new feeder groups
• Red
– Lights on Q3 2012, full functionality Q3 2013
– Committed load, five customers, 59MVA
• Green
– Lights on Q4 2012, full functionality Q4 2014
– Committed load, five customers, 63.2MVA
• Blue
– Osborn Street upgrade dependant, post 2017
– Currently receiving enquiries
15
Red Route Progress
• Ducts and cables installed from Back Hill to junction of
Camomile Street.
• Final jointing in progress to energise from Back Hill
• Switchgear for first customer has been manufactured delivery and commissioned within the next two months.
• All switchgear has been ordered for the other customers.
• Final section from Camomile Street to Finsbury Market
will be completed after the Olympics.
16
Green Route Progress
• Ducts installed from Great Sutton Street to Fan Street.
• Expected completion from Great Sutton Street through to
Finsbury Market by August 2012.
• First two feeders to be live by end 2012 to connect one
customer via temporary circuit breakers.
• The rest will be made live following the completion of the
new switchboard at Finsbury Market July 2013.
• Excavation from Great Sutton Street to Back Hill to take
place in 2013.
17
This excavation by Murphy Ltd in December 2010 was at the junction of Cheapside
and King Street in the City of London and forms part of the Pinnacle 33kv route; as
you can see there are many existing services present making trench excavation very
difficult along with the installation of trench support prior to duct installation.
This excavation in Cheapside was
adjacent to St Mary-Le-Bow Church
and shows the additional trench
support required for a deep
excavation along with steel beams
and nylon straps to support existing
services.
The excavation at this point was
moving from the Westbound
carriageway into the Southbound
carriageway; a shallow bank of
approx 30 telecoms ducts with a
concrete surround was uncovered in
the middle of the road; beside this
was a large Water main followed by a
large Gas main therefore the only
space available for our new ducts (26
in total) was a 250mm gap below the
exposed mains and just above the
Victorian brick built sewer approx 3.5
meters deep.
The trench had to be extended to
approx 5 meters wide to create
enough room for the ducts to be
installed in a flat formation by 3.5
meters deep; an excavation of this
size required a temporary works
design and this section alone took
approx three weeks to complete.
This excavation in Cheapside by Laing O’Rourke shows the four x 200mm and 6 x
89mm ducts for the Pinnacle 33kv scheme along with 16 x 11kv ducts installed as
part of the One New Change scheme; the 4 x 200mm ducts laid flat in the trench are
ready to be connected following the installation of a cement bound sand bed.
This section of work in
Worship Street Hackney was
completed by Compass
Infrastructure (formally
Nacap) and shows 200mm
ducts installed for four
separate 33 kv schemes, 4
ducts for the Pinnacle Tower
(red route); two ducts to
Bishops Place (Green Route);
two ducts to the Interxion
Data centre at Brick Lane and
four ducts for the Blue route;
the 89mm ducts for the pilot
cables were installed shortly
after; all 12 33 kv ducts have
been surrounded by cement
bound sand.
Also noticeable in the photo
each side of the 200mm
ducts is a layer of very hard
dark coloured aggregate
which is believed to be the
original 17th century road
construction as confirmed by
the Museum of London
archaeologist who visits site
on a regular basis.
This photo shows 24 x 500 metre drums of 33kv Copper cable recently delivered to
our contractors Compass Infrastructure (formerly Nacap) and currently stored in
Bishopsgate adjacent to the Pinnacle Tower; cable installation has now started and
will continue into 2012.
Compass did provide overnight and weekend security.