Download - Network Investment Plan
-
8/2/2019 Network Investment Plan
1/16
Network Investment Plan2010-2015
-
8/2/2019 Network Investment Plan
2/16
Contents
1. Welcome Page 3
2. The Electricity Supply Industry Page 4
3. Our Assets and Key Facts Page 5
4. Our Investment Programme and its Structure Page 6
4.1 Load Related Programme
4.1.1 Customer Connections
4.1.2 General Reinforcement
4.1.3 Distributed Generation
4.2 Non Load Related Programme
4.2.1 Asset Replacement
4.2.2 Losses
4.2.3 Flooding
4.2.4 Quality of Supply
4.2.5 Visual Amenity
4.2.6 Diversions
4.2.7 Environment
4.2.8 Safety
4.2.9 Operational IT
4.3 Network Maintenance
4.3.1 Inspections & Maintenance
4.3.2 Faults
4.4 Trees
4.5 Non Operational Programme
4.6 R&D
4.7 Programme Deliverables
5. Contact Us Page 15
2 Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
3/16
We are entering an interesting and exciting period in the
industry with climate change and green energy playing a
greater part in our plans together with the application of new
technology. Over the next ve years, we intend to efciently
invest over 1.4 billion in the region to meet the challenges
posed by the move to a low carbon economy, changes in the
pattern of demand for electricity and the needs of servicing an
ageing network.
Longer-term, we foresee a number of signicant future
challenges for the industry which could radically change both
the networks we own and the way they are operated. We plan
to produce a longer-term outlook report later this year which
will set out our views to 2050.
1. Welcome
Our plans are based on delivering against the recently
concluded price control negotiated with Ofgem for the 2010-
2015 period and incorporating initiatives based on feedback
gained at previous stakeholder workshops.
Our plans are based on achieving several simultaneous targets
in terms of the performance of the network, its condition
and utilisation, as well as meeting all our legal and statutory
responsibilities. This document sets out our plan in terms of
the planned investment by driver, detailing the rationale for
each and the resulting plans.
We would be delighted to hear your views. If you wish to
contact us, a number of different ways are listed at the back
of this document.
Steve Johnson
Chie Executive Ofcer
Welcome to Electricity North WestsInvestment Plan Statement for 2010 2015.
The aim of this document is to explain our
role in the energy industry and detail what
assets we own. It will then outline how we
manage our assets and our resulting network
investment plan for the 2010 2015 period.
3Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
4/16
2. The Electricity Supply Industry
The electricity industry in Great Britain is structuredinto four main groups;
The generators, who own the major power stations and
produce electricity from a variety of fuel sources.
The National Grid, who own and operate the 400kV and
275kV transmission network that links the major power
stations and transports electricity in bulk across the UK.
The 14 Distribution Network Operators (DNOs), who own
and operate the remaining electricity network, connectingthe remaining generators and the national grid to every
electricity customer in the UK.
The suppliers, who buy the electricity produced by the
generators, sell that electricity to their customers and
pay the network operators for the transportation of that
electricity across their networks.
The electricity market is regulated by the Gas and Electricity
Markets Authority (the Authority), which governs and acts
through the Ofce of Gas and Electricity Markets (Ofgem).
In the electricity market, suppliers contract with generators
(for wholesale power) and with transmission and distribution
network businesses (for delivery services), in order that they
can provide energy to nal consumers. Distribution operators
are directly regulated by Ofgem and their charges for use
of their networks are subject to a ve-year price control
mechanism.
We are one of the fourteen DNOs and a private limited
company. We are owned by a consortium of funds controlledby the Commonwealth Bank of Australia and IIF International
Holding GP Ltd which is a constituent of JP Morgan
Infrastructure Investments Fund.
We have an indirect nancial relationship with customers
as we charge suppliers for the use of our network and the
suppliers in turn charge their customers the total cost for all
elements in the supply chain. We account for approximately
15% of the nal bill for electricity for domestic consumers.
We use these revenues to operate and maintain the network,
together with delivering an investment programme of renewal
and expansion as detailed in this document.
4 Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
5/16
Our network comprises of the following key assets:
Over 13 000km of overhead lines
Almost 44 000km of underground cables
Almost 84 000 items of switchgear
Over 34 000 transformers
Through this network we deliver over 25 TWh of electricityeach year to over 2.4 million customers across 12 500 square
kilometres of North West England.
Our network covers a diverse range of terrain and customer
mix from isolated farms in Cumbria, to areas of heavy industry,
urban populations and city centres as shown in the map.
Our network assets range from large transformers to
individual services. All these assets are held in a register so
that we can manage ongoing maintenance through their lives
and up until they are programmed for replacement.
The investment programme is therefore managed through
different types of projects from bulk programmes for thereplacement of high volume low value assets through to
bespoke large projects for work at single sites.
In delivering the investment programme we manage
thousands of individual projects ranging in value up to
tens of millions of pounds.
On average, the network performs such that a customer
experiences a power cut every two years and is without
electricity for less than one hour every year (99.99% reliability)
Blackpool
Preston
Blackburn
Burnley
Manchester
Macclesfield
Wigan
Bolton RochdaleOldham
Ashton
Barrow
Lancaster
Kendal
Workington
Whitehaven
Carlisle
Stockport
3. Our Assets and Key Facts
We operate a distribution network built of overhead lines,underground cables, transformers, switchgear and ancillary
equipment.
5Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
6/16
4.1.1 CUSTOMER CONNECTIONS
New buildings require new electricity connections and, where
appropriate, enhancements to the existing network. Customer
connections are a competitive market area with a number of
different organisations providing alternative quotations for
new connections to our network.
Most connections however are
ultimately adopted as part of our
network. The size of this
investment programme is
dependent upon requests from
customers for supply and therefore
subject to economic conditions.
When work is undertaken to
provide new supplies most of
this is paid for by the customer
requesting the supply.
The chart opposite shows the number of new connections to
our network over a ten year period. The rst ve years of this
chart are actual gures and the remaining ve years are
based on forecasts. This highlights the effect of the recenteconomic recession and our forecast for a slow recovery.
We undertake investment forthree key reasons;
Expanding and replacing the network (4.1 and 4.2)
Maintaining and repairing it, and (4.3 and 4.4)
Supporting activities (4.5)
Our capital programme aims to expand the network to cater
for changes in demand for electricity and to provide new
connections. We term this load-related capital expenditure.
We are also investing signicant funds in replacing the
existing assets as they reach the end of their useful life,termed non-load related capital expenditure.
In addition to these dened programmes we invest in the
network by undertaking routine maintenance, the repair of
faults, non operational investment to purchase equipment
to help us undertake the work and undertake research and
development activities.
For the ve year period we are planning to invest around 1.4
billion across these areas as shown in the chart below. This
represents a 36% increase over the previous ve year period.
4. Our Investment Programme
ENW Investment Plan 2010-2015
Load Related Plan 2010-2015
During 2010 2015 we plan to invest over
400 million on load related projects as shown inthe chart above. This represents a 12% increase
over the previous 5 years.
4.1 LOAD RELATED PROGRAMMELoad related investment is undertaken to allow growth of the
network. This can take a number of forms but is mostly due to
the connection of new supplies to the network.
30%
47%
4%
14%
2%
2%
KEY
Load related
Non-load related
Non-operational
Network Maintenance
Trees
R&D
KEY
New Connections
DG Connections
General Reinforcement
51%
18%
31%
6 Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
7/16
We will continue to forecast future investment requirements
based upon general economic and market information and
conditions. As part of this we will liaise with housebuilders
and other stakeholders to better understand market trends.
We will continue to improve response times to connectors
requests and continue discussions with our regulator
regarding pre investment in known development areas.
During 2010 2015 we plan to invest over 200
million to connect around 84 000 new supplies.
4.1.2 GENERAL REINFORCEMENT
Existing customers change their usage of electricity over time
with reductions caused by using more efcient equipment, or
increases caused by doing more or using larger equipment.
The combined effect of all these individual changes results in
changing demand patterns on our network. Where increasing
demand causes our network to approach its capacity limits,
we will invest to increase the networks capacity.
Where we provide an electricity supply to customers it has to
be within a specied voltage range. On the infrequent
occasions where customers experience voltage outside these
limits, we will investigate and, where necessary, correct the
problem within a guaranteed period.
When we build the investment programme for general
reinforcement we go through a process of prioritisation.
This ensures that our investment targets those sites that have
the greatest need for some form of intervention.
This prioritisation takes account of a number of factors that
cover a comparison of demand against rm capacity, the
amount of time per year the demand is above rm capacity
and the number of customers.
New Connections
During 2010 2015 we plan to invest over 100
million to reinforce our network.
0
5000
10000
15000
20000
25000
2005-06
2006-07
2007-08
2008-09
2009-10
2010-11
2011-12
2012-13
2013-14
2014-15
Within the general reinforcement programme the largest
single project is the Wigan 132kV Reinforcement project
(which is expected to cost around 20 million).
There is a need to reinforce the network in the Wigan area.This will be achieved by building a new large substation in
the Upholland/Orrell area of Wigan which will be supplied
by a new circuit to be installed to connect to the national
grid at Kirkby.
This scheme is part of a strategy to uprate the capacity of
the Lancashire area as a whole. Another scheme for a new
Bulk Supply Point (BSP) at Preston to support the northern
end of the group was constructed in 2008. In combination,
the two schemes will relieve Wigan, Wrightington, Leyland
and Ribble BSPs (serving a total of 247 000 customers)
which are all currently loaded at the limit of their capacity.
7Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
8/16
Our Investment Programme continued
4.1.3 DISTRIBUTED GENERATION (DG)Climate change and an increase in environmental awareness
have led to a change in the mix of fuel sources for electricity
generation and also a change in the scale of generation
plant. Many new generators are much smaller than traditional
power stations and therefore connect to the lower voltage
distribution networks, such as that owned by ourselves, rather
than the higher voltage transmission network owned by
National Grid.
Electricity generators connected to the distribution networks
are called distributed generation (DG). Most new DG produce
renewable energy and/or low carbon combined heat and
power.
We recognise the importance of the roll out of DG in meeting
renewables targets and will continue to provide suitable
network connections to meet the needs of the connectors
of DG. We will also continue to work with the regulator and
the rest of the industry on innovative solutions for network
development to provide a more exible network that can
accommodate the wide range of connections envisaged in
some of the future scenarios.
DG installation capacity (MW) by type 2010-2015
0
50
100
150
200
250
300
350
Micro
CHP
(dom
estic)
Othe
r(notCHP)
Waste
incineration
Photovoltaic
Landfillg
asand
biogas
Biomass(not
CHP)
SmallCHP
(1MW)
Onsho
rew
ind
Offsho
rew
ind
The size of this investment programme is dependent upon
requests from customers for supply and therefore subject to
economic conditions. When work is undertaken to provide new
supplies most of this is paid for by the customer requesting
the supply.
During 2010 2015 we plan to invest around
80 million to enable the connection of 1GW of
generation sites to our network.
The chart below gives a breakdown of DG capacity by
technology type. This shows the capacity of DG that we expect
to connect to our network based on proposals by the developers
of DG sites and our own assessment of the market drivers.
8 Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
9/16
4.2 NON-LOAD RELATED PROGRAMMEThe non-load related programme is undertaken for a variety of
different reasons. A large component of the programme is for
the replacement of old assets in poor condition. Other parts
of the non-load programme are for specic improvement
initiatives.
There are some programmes that are currently at an
embryonic stage and as such are not listed separately in
detail because the spend forecast for the ve years is so low.
During 2010 2015 we plan to invest about
680 million on non-load related projects as
shown in the chart above. This represents a
52% increase over the previous ve years.
9%
70%
5%
1%
2%
1%1%
0%
12%
KEY
Asset ReplacementLossesFloodingQoS
DiversionsEnvironmentVisual AmenitySafetyOperational IT
Non-Load Related Plan 2010-2015
0
200
400
600
800
1000
1200
1920
1923
1927
1931
1935
1939
1943
1947
1951
1955
1959
1963
1967
1971
1975
1979
1983
1987
1991
1995
1999
2003
2007
Age prole for high voltage ground mounted circuit breakers
4.2.1 ASSET REPLACEMENTAll physical network assets have a nite lifespan before they
become unt for purpose. Our asset replacement investment
is designed to replace those assets at the end of their life and
replace them with their modern equivalent in order to maintain
the networks capacity and performance levels.
Through good asset management practices, we have
been able to extend the life of many of our network asset
components, however we are now in a period where we
need to replace an increasing number of assets. This reects
previous historic investment linked to UK economic cycles,
including the post-war prosperity boom and electrication
programmes of the 1960s. This can be seen in the chartbelow which shows the age prole of ground mounted high
voltage circuit breakers.
We will continue to invest in our network to maintain its
overall health, continuing our historically good performance
and safety standards. We will also continue to invest in our
asset management systems to ensure we improve the timing
and efciency of any investment we make.
We continue to review our asset replacement policies,
particularly with regard to the rebuilding of overhead lines
to ensure they are resilient to storm conditions and climatic
change.
9Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
10/16
Our Investment Programme continued
4.2.3 FLOODINGAn increased environmental risk with climate change is that
of ooding from river or coastal sources. A number of our
major sites are located near to water sources as they were
installed at power stations that required water for cooling
purposes. Our smaller sites are located close to customers,
many of whom live in homes built on ood plains.
We have identied those major sites at risk of ooding and are
delivering an ongoing programme to improve ood defences
at those sites. We are working locally and nationally with a
number of environmental agencies to ensure our modelling is
up to date with the latest available information and that our
plans are prioritised accordingly.
During 2010 2015 we plan to invest around
7 million to protect those sites most at risk of
ooding.
When we dene the investment programme for asset
replacement we go through a process of prioritisation.
This ensures that our investment targets those parts of
the network that have the greatest need for some form of
intervention. This prioritisation takes account of a number
of factors that cover safety to the public and our personnel,
condition of the assets, environment, operating history,
previous faults on the same type of asset, availability
of spare parts and local knowledge.
During 2010 2015 we plan to invest around
470 million on the replacement of poor
condition assets.
4.2.2 LOSSES
Electricity owing through a conductor generates heat, whilst
a transformer can generate both heat and noise. This results
in approximately 5% of the electricity entering our network
being lost. Although these losses cannot be totally eliminated,
they can be reduced by installing more expensive plant and
equipment that is designed to operate with lower losses.
During 2010 2015 we plan to invest around
2 million to install equipment as a trial that will
reduce losses at two key substations.
10 Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
11/16
4.2.4 QUALITY OF SUPPLYQuality of supply investment is undertaken with the aim
of improving the overall quality of service experienced by
customers.
This will be achieved by investing in projects that can reduce
the number of customers affected by faults, reduce the length
of time customers are off supply in the event of a fault and
also reducing the likelihood of faults on the network.
In addition we are planning to undertake specic investment
to improve the service received by those customers who
experience the worst reliability on the network. These are
generally located in very rural locations and at the end of long
overhead line networks.
The quality of supply experienced by customers is measured
based on the number of interruptions (CI) to supply and the
length of time customers are without supply, or customer
minutes lost (CML).
It should be noted that the programme of planned asset
replacement will impact this performance due to the required
network outages when replacing assets. These forecasts
exclude for the effect of planned outages, which for the
ve years to 2015 reect the increased programme we are
planning for the replacement of overhead lines. With the effect
of planned work excluded, the underlying change to CI and
CML performance is a 6% improvement.
During 2010 2015 we plan to invest around
4 million on projects that will improve the service
experienced by customers, particularly to speed up
supply restoration following a fault.
0
10
20
30
40
50
60
2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
4.2.5 VISUAL AMENITYIn 2005, a specic limited programme of undergrounding
overhead lines, identied by regional stakeholders, within
statutory National Parks and Areas of Outstanding Natural
Beauty commenced.
Funding for this programme was allowed by Ofgem up to a
value of 5 million following their customer willingness to pay
survey and a review of the various environmental obligations
placed upon the industry.
The two photographs below show an example of such a
project before and after investment.
15 year CI CML performanceWe support this initiative as a model of public-
private partnership and have planned for its
continuance at a level equivalent to the current
programme in 2010 2015. This is around
7 million during the ve years.
4.2.6 DIVERSIONS
Sometimes when development work is planned for either
building or new road developments, our network assets
may be in the path of these developments. Assets therefore
need to be diverted to an alternative location to allow these
developments to proceed. We plan for this type of work based
on historical trends and any known large projects.
Diversions projects mostly involve diverting underground
cables and occasionally overhead lines and substations.
During 2010 2015 we plan to invest around30 million on diversions activities.
4.2.7 ENVIRONMENT
Environmentally-driven investment takes place to ensure
compliance with environmental legislation. We plan to invest
to guard against oil leakage from our sites and to mitigate
noise where appropriate.
During 2010 2015 we plan to invest around
12 million on environmental projects.
11Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
12/16
Our Investment Programme continued
4.2.9 OPERATIONAL ITThe operational IT programme is aimed at the replacement
and improvement of those IT systems that are used for
the real time control of the network. The ability to operate
the network remotely offers benets in terms of the security
of supplies and is used to minimise disruptions experienced
by customers.
BT Group PLC are migrating their existing network toa system known as 21st Century Network. This new
network will be unable to offer guaranteed times for
the transfer of data signals. Our control and protective
systems require a level of certainty in the time taken for a
signal to transfer from our control centre to a substation
on the network so that we can continue to safely and
securely operate our networks.
In order to maintain these signal transmission times we
will construct our own data network over which we have
total control. This will be done by providing a new bre
system where signal transmission times are well within
the specication of the protective systems.
4.2.8 SAFETYWe operate a safe and efcient network. We have a strong
safety record and we will continue to invest appropriately
to maintain that record.
Most of our safety related investment over the next ve years
is to ensure our overhead lines maintain safe horizontal and
vertical clearances in line with the Electricity Safety Quality
and Continuity Regulations (ESQCR) 2002.
We operate within a modern social environment. Unfortunately,
there is an increasing trend of vandalism and other anti social
behaviour in and around our substations. With the recent rapid
increase in world metal prices we, like all other utility
companies, have seen a signicant increase in the theft of
metalwork from our substations. Our major sites may also be
considered a suitable target for some terrorist organisations.
We will continue to invest in an ongoing programme of security
strengthening at identied sites. We will also continue to work
with community partners to reduce anti social behaviour
around our installations and reduce the value of our
equipment to thieves.
During 2010 2015 we plan to invest over
80 million on projects to improve safety.
During 2010 2015 we plan to invest almost
60 million on operational IT projects.
12 Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
13/16
4.4 TREESOne of the main external impacts
on our overhead lines is trees.
We have a routine programme of
vegetation management where
we cut and prune trees growing
in the vicinity of the overhead lines
to maintain public safety and to
reduce the risk of trees causing
faults on the lines. We believe we
may be beginning to see early
climate change effects, in that the
growing season is extending and that the number and severityof storms may be on the increase.
We are working with the rest of the industry to update historic
practices and develop enhancements such as resilience,
where more trees are managed to reduce the risk posed by
falling trees in heavy storm conditions.
During 2010 2015 we plan to invest over
26 million on projects to maintain clearances
from trees.
4.5 NON OPERATIONAL PROGRAMME
The non-operational programme aims to deliver projects in
areas that will support delivery of the operational investment
and management of the business.
During 2010-2015 we are planning to invest in the following:
Accommodation and maintenance of our buildings
Improvement of existing IT and the introduction of new
systems
Tools to maintain existing stocks and introduce new tools
and instruments to improve working practices, customer
service and safety
The replacement of 500 vehicles out of a eet of around
750 ranging from cars and small vans to large trucks and
specialist vehicles
By having the right balance of these resources in place
we will optimise the way we are set up and operate to be
able to efciently deliver the investment programme during
2010 2015.
During 2010 2015 we plan to invest almost
60 million on non-operational projects.
4.3 NETWORK MAINTENANCE4.3.1 INSPECTIONS & MAINTENANCE
We routinely inspect and maintain the assets that make up our
network to ensure they remain safe and continue to provide a
high level of service.
Occasionally some assets need to be turned off to do this
safely which may result in an interruption to supply. Where
this is necessary, we give customers at least two days notice
of the interruption and its length to allow them to make any
alternative arrangements they feel are necessary.
We will also continue to invest in training and systems to
ensure inspection information is efciently collected and used
to continually improve the management of the network.
During 2010 2015 we plan to invest over
110 million on inspecting and maintaining
the existing network assets.
4.3.2 FAULTS
Occasionally faults occur on parts of our network caused
either by deterioration or by a number of outside inuences.
Fortunately loss of supply is an infrequent occurrence. We
have a network availability of over 99.99% with, on average,
a customer experiencing one power cut every two yearsand being without electricity for about two hours for each
occurrence. As these are averages, most customers receive
a better service but some customers do unfortunately
receive worse.
Dedicated teams respond to faults when notied either by
customer calls or by alarms generated by the network itself.
These teams attempt to identify the source of the problem,
restore supplies to customers as quickly as possible and then
repair the network back to normal.
In an average twelve month period we respond to around
14 000 faults, averaging forty to fty faults per day.
During 2010 2015 we expect to invest about
95 million on work to rectify faults across the
range of network assets.
13Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
14/16
4.6 R&DWe are investing signicant amounts of time and money in
a variety of research and development programmes funded
under Ofgems Innovation Funding Initiative. Since 2004 we
have invested over 6 million in a range of projects that are
designed to enhance the performance of our network in
a variety of ways. We are planning to increase our R&D
investment during 2010-2015 under Ofgems new Low
Carbon Networks Fund scheme as we prepare the way for
electricity distribution networks to help deliver the low carbon
electricity system that is required to meet national climate
change objectives.
There are two Tiers to the Low Carbon Network Fund:
the First Tier of the Fund allows us to manage the small scale
deployment of new technologies and the Second Tier is for
large agship Smart Grid Projects.
Our research and development projects cover three primary
activities. Asset Management, Quality of Supply and Smart
Grids.
Under Asset Management we have a number of projects that
are, for example, researching new ways to manage our asset
base from investing in biodegradable alternatives to mineral
insulating oil, developing new techniques to better understand
the condition and ageing of network assets and investigatinghow we may be able to deliver more capacity from our network
by understanding and quantifying the cooling effects of wind
and weather on our assets to avoid upgrading where possible.
We have a number of projects under Quality of Supply. We are
developing a range of instruments that can detect and locate
defects on our underground cable network before the defect
turns into a fault and customers are disconnected. We are
also developing a device for intermittent cable faults, the Fuse
Restorer, that can automatically replace a standard fuse into
a faulted circuit to restore supplies and then send a text
message to an engineer to tell them the location of the fault
and the type of fault event.
For Smart Grids we are developing a number of projects,
funded by the First Tier of the Low Carbon Networks Fund,
delivering new technologies including the UKs rst super-
conducting fault current limiter installed on our network at
Bamber Bridge near Preston. This can assist with the
connection of large amounts of local renewable energy
generation to allow us to reduce our reliance on fossil fuels
for electricity generation. In addition we will develop proposals
and seek funding from the Second Tier of the Low Carbon
Networks Fund to manage Smart Grid Projects in the NW.
During 2010 2015 we plan to invest up to
30 million on R&D projects
Our Investment Programme continued
4.7 PROGRAMME DELIVERABLESOur programme aims to replace and refurbish a range of
existing network assets, install new assets, restore assets
back to service following faults and continue maintaining
assets in order to manage network capacity and maintain
the condition, performance and safety of the network.
Additional network assets will result from the DG and
Customer Connections programmes but these cannot be
accurately quantied in advance as these depend on exactly
what supplies are requested, but more importantly where and
also on what network capacity may already be available there.
During the ve years, excluding Connections and DistributedGeneration, we are planning to undertake some form of
intervention (replace/refurbish/install new) on:
Over 5 300 items of switchgear
Over 1 400 transformers
Almost 5 500km of overhead lines
Almost 1 000km of underground cables
Additionally as part of the ongoing maintenance programme
we will:
Respond to around 14 000 faults annually on the network
Inspect 176 000 spans of overhead line and undertake
tree cutting to maintain safe clearances for 75 000 spans
Continue to undertake routine scheduled maintenance
of the network assets in accordance with our Codes of
Practice
We forecast that this investment will allow us to manage
the condition and utilisation of our network. Over the next
ve years, we will be measuring this through a range of
indicators comprising Health Indices (HIs) and Fault rates for
specied asset types, and Load Indices (LIs) for the loading of
network elements. This is in accordance with Ofgems newly
introduced Network Outputs regime for 2010-2015.
14 Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
15/16
5. Contact Us
We are interested in views onthis document and our future
plans, including whether there
are any areas you feel we have
missed, or other priorities and
factors we should consider.
YOU CAN:
Write to us at the following address:
Head of External Communications
Electricity North West
304 Bridgewater Place
Birchwood Park
Warrington
WA3 6XG
E-mail us at the following address:
Or via the link on our website which also includes details
of previous stakeholder events:
www.enwl.co.uk
We look forward to hearing your views!
15Electricity North West Network Investment Plan 2010 to 2015
-
8/2/2019 Network Investment Plan
16/16
Electricity North West
304 Bridgewater Place
Birchwood Park
Warrington
WA3 6XG
www.enwl.co.uk