Download Low Carbon London - Isaac Newton Institute

DNO Challenges
Change is the only constant
Agenda
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Distribution Network Operators
Electricity supply chain
UK Power Networks
Regulation – Ofgem
How to manage a network
Changes bringing challenges
24 April 2013
 2011. UK Power Networks. All rights reserved
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Distribution Network Operators
• Manage the distribution networks
from 132 kV to 400 V
• Monitor these networks
• Restore supplies following a fault
• Enable distributed generation
• Provide new connections
• Provide a level of security
24 April 2013
 2011. UK Power Networks. All rights reserved
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System voltages
132kV
132kV
132kV
132kV
11kV
66/33/22kV
National
Grid
400/275kV
400/230V
11kV
25kV
traction
supplies
Industrial & large
commercial
400/230V
Domestic & small
commercial
24 April 2013
 2011. UK Power Networks. All rights reserved
About UK Power Networks
• Since 1 November 2010 UK Power
Networks has been owned by the
Cheung Kong Group (CKG).
• UK Power Networks plans, constructs,
operates and maintains three
distribution networks in our regulated
business.
• Altogether, there are 170,000 km of
underground cables and overhead lines
and more than 130,000 substations.
• We also carry out these services for
customers who have their own Private
Distribution networks in our unregulated
business.
• We have 5,500 employees.
24 April 2013
 2011. UK Power Networks. All rights reserved
Operations Centre
Tactical Centres
Emergency Resource
Centres
What we do
• Our regulated business is responsible
for distributing electricity to a quarter of
the UK’s population, providing power
to eight million homes and businesses
across London, the South East and
East of England.
• We own and operate the network of
underground cables and overhead
power lines that bring electricity to the
customer.
• We are one of the largest developers
of electricity networks in the UK.
24 April 2013
 2011. UK Power Networks. All rights reserved
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The Regulator - Ofgem
• The Office of the Gas and Electricity Markets.
• Protecting consumers is their first priority.
• They do this by promoting competition and regulating the monopoly
companies
• The interests of consumers are taken as a whole, including their
interests in the reduction of greenhouse gases and in the security of
the supply.
• Price Control Mechanisms are changing
– From 2015 RIIO ED1 comes into force
– Revenue = Incentives + Innovation + Outputs
• Emphasis on incentives to drive the innovation needed to deliver a
sustainable energy network at value for money to existing and future
consumers.
24 April 2013
 2011. UK Power Networks. All rights reserved
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Networks around Cambridge
24 April 2013
 2011. UK Power Networks. All rights reserved
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Schematic diagrams
24 April 2013
 2011. UK Power Networks. All rights reserved
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A Typical 11 kV Distribution Network
24 April 2013
 2011. UK Power Networks. All rights reserved
A Typical LV Distribution Network
24 April 2013
 2011. UK Power Networks. All rights reserved
Typical Primary Substation Demand Curve
How much demand is masked by generation?
DG with CB postcodes numbers 2600 and 8.5 MW mostly PV.
24 April 2013
 2011. UK Power Networks. All rights reserved
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Distributed Generation
• Small scale Generation connected to the low voltage and
11kV networks.
• Connected to domestic and commercial premises
• What impact do they have?
• Clusters
• Reverse power flow
• Triggers network investment
24 April 2013
 2011. UK Power Networks. All rights reserved
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Increased Levels of Distribution Monitoring
24 April 2013
 2011. UK Power Networks. All rights reserved
14
The Next Twenty Years
• What could the network look
like?
• Work of Supergen 1 scenarios
• DECC Foresight workshops
• How much of the network will
change?
• Targets of 20% by 2020 and
beyond
• Will the network be flexible
enough?
24 April 2013
 2011. UK Power Networks. All rights reserved
What are we doing about it?
• Currently we model the worse case scenario
• Does PV assist the network during peak demand
periods?
• Could we do something different?
• Ofgem Introduced Low Carbon Network Fund
• UK Power Networks has three tier 2 projects
– Low Carbon London
– Flexible Plug and Play
– Smarter Network Storage
24 April 2013
 2011. UK Power Networks. All rights reserved
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Low Carbon London - A learning
journey
Learning how to create a smart low carbon city
Low Carbon London
A pioneering demonstration project,
trialling new technologies, commercial
innovation and strategies…
 Distributed generation
 Electric vehicles and heat pumps
 Smart meters
 Demand Side Management
 Wind Twinning
 Learning Lab
 Video
 Conclusions
24 April 2013
 2011. UK Power Networks. All rights reserved
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Flexible Plug and Play
Cheaper and faster
connection of
renewable generation
to the network by
trialling smart
technologies and
smart commercial
agreements
24 April 2013
 2011. UK Power Networks. All rights reserved
Existing renewable
generation projects:
 100 MW
Proposed renewable
generation projects:
 200 MW
Trial Location
Characteristics:
 Thermal/Voltage
Constraints
 Reverse Power Flow
 Legacy protection
arrangements
Smarter Network Storage
Storage Hardware
Storage
Commercial
Models
Smart Control &
Operating
Systems
24 April 2013
• Storage Technology assessments and procurement
• Installation and commissioning of storage unit at Leighton Buzzard
primary (6MW / 10MWh expand to 8MW / 24 MWh)
• Investigation of the value in a range of different ownership and
operating models, leveraging benefits from:
• Peak-lopping for network support – avoiding UKPN
reinforcement
• Transmission system stability and reserve – STOR and
Frequency Response
• Energy arbitrage and market trading opportunities
• Investigation and development of smart control and operating system
to maximise the value from storage, and facilitate shared utilisation,
network visibility and management
 2011. UK Power Networks. All rights reserved
Smart Meters by 2019
• Every domestic and SME will have a smart meter.
• Energy suppliers will have accurate kWh profiles
• Small scale generation will no longer be assumed use
• Will this produce value for the DNO?
• Will customers wish to participate in ToU tariffs?
24 April 2013
 2011. UK Power Networks. All rights reserved
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Challenges facing us
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Tsunami of data approaching
Storage of necessary data
Facilitate DG connections
Understand the impact of Demand Response
How can we increase our network awareness with
limited monitoring?
24 April 2013
 2011. UK Power Networks. All rights reserved
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