britain’s first smart grid - scottish and southern
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18th May 2012
Britain’s First Smart Grid: Sharing the Knowledge
John Scott john.scott@chilternpower.com
www.dnvkema.com
No
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win
dfa
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European Marine Energy Centre (EMEC) is a Scottish Government-backed research facility that has installed a wave testing system at Billia Croo on the Orkney Mainland and a tidal power testing station on the island of Eday.
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Cons
train
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Th
e 3
3k
V n
etw
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Wind farm with rating in MW
2.7MW
Single turbine with rating in MW WESTRAY
9.95MW SANDAY
Open
Marine Energy with rating in MW
Fossil Fuel generator ROUSAY Tidal 4MW
0.9MW
EDAY
point
STRONSAY with rating in MW
0.9MW
15.3 MW BURGAR HILL
Potential Constrained 2.55 MW
Cable 0.9MW
0.9MW 0.9MW
4.5 MW
SHAPINSAY
Constrained cable
0.9MW
KIRKWALL
STROMNESS Diesel 15MW 0.9MW
Wave 7MW
SCORRADALE ST MARYS
NORTH HOY 0.85 MW
0.9MW LYNESS FLOTTA
2.0 MW Gas 10.5MW
11kV circuit
33kV circuit
33kV interconnector to Scotland
33/11kV sub station
Map by Martin Lee 1992 to 2011
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Sc
he
ma
tic
North Hoy Lyness 0.9MW wind
Flotta Oil Terminal 10.5MW Gas Turbines
Flotta 2.0MW wind
St Marys 1.75MW wind
Kirkwall 16MW Diesel 0.9MW wind
Shapinsay
Shapinsay 0.9MW wind
Stronsay
Stronsay 2.25MW wind
Stronsay 0.9MW wind
Sanday
Sanday 9.95MW wind Eday
Eday 4.0MW Tidal
Westray 2.7MW wind
Rousay 0.9MW wind Burgar Hill
12.5MW wind
Hammars Hill 4.5MW wind
Stromness 0.9MW wind 7.0MW wave
Open point
Scorradale
Voltage Regulators
Hoy
Ba
ck
gro
un
dThe ANMThe ANM
• The Active Network Management scheme is a smart grid solution to Orkney network congestion
Beyond BAU
Beyond BAU
• Conventionally, further generation would haverequired a new submarine cable to the mainland
OutcomeOutcome
• Generation connections beyond traditional ‘firmcapacity’ limits have been enabled
ContextContext
• Implemented in a commercial environment • With close stakeholder engagement
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Ba
ck
gro
un
dBAUBAU
• Conventional inter-tripping arrangementsenabled 21MW of additional capacity to beconnected
ANMANM
• A further 20 MW of renewable generation hasbeen enabled by the ANM scheme
££££££
• Cost of ANM scheme c. £500k • Cost of subsea cable reinforcement c. £30m
TimeTime • 5 years from concept to active operation
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T
ec
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ANMANM
• The scheme monitors the network and curtails generation to maintain network security
DesignDesign
• Fail-safe was the design mantra: for plant, staff,connected consumers and the wider public
PLCsPLCs • The controller utilises Programmable Logic
Controllers (PLCs)
Not SCADA
Not SCADA
• Decision-making in real time cannot readily beprovided by SCADA systems
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C
om
me
rcia
l o
utl
ine
LIFOLIFO
• A range of alternatives was considered • Curtailment is on a LIFO basis (Last in First out) • It is simple and has a ‘feels fair’ quality
AnalysisAnalysis
• The curtailment analysis was accepted by lendersfor the commercial investment cases
ChoicesChoices
• Alternatives to LIFO could be explored but there will likely be ‘devil in the detail’
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C
om
me
rcia
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utl
ine
QueuesQueues
• A place in the LIFO stack is key to generators butis complex where there are many parties
EntryEntry
• Clear requirements for queue entry needed • Planning consent confirmation and a deposit
EngagementEngagement
• Local stakeholders have collaborated with commercial ventures
• Hammars Hill Energy Ltd (4.5MW) includes localshare ownership
5 x 900kW Enercon wind turbines
R
eg
ula
tory
ou
tlin
eRPZRPZ
• At the time of scheme conception Ofgemoperated the Registered Power Zone (RPZ)incentive arrangements
BoundingBounding
• The RPZ status was considered helpful • It bounded the special arrangements
LIFOLIFO
• Ofgem indicated their support for a simple LIFOarrangement for this project
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It
s O
pe
rati
on
Control Room
• A distinctively new facility for control staff • DNO planning/control room staff early
involvement
Security
• Training packages built and delivered by SGS • Fail-safe operation to a stable operating condition
is important for operator's confidence
Events
• Loss of BT private wire communication has been the main cause of unnecessary output reductions
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It
s O
pe
rati
on
Control Room
• Generators would like more information about scheme operation in real time
Security
• Is the scheme operating as intended – or is revenue being lost needlessly?
• When will normal operation be resumed?
Events
• No malfunctions of the system have beenobserved
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L
ea
rnin
g P
oin
tsDesign
• Redundancy wise for communications channels • Consider remote IT access for contractors
Response
• When the scheme goes to fail safe mode, capability for self-restart on resolution is helpful
• Pinpoint the failed element where a third party provides a key service
Stakeholders
• Messaging in plain language benefits all parties • Induction training is important, with periodic
refreshment, especially in community schemes
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De
ve
lop
me
nt
Extend
• Opportunities identified to extend the scheme further eg State Estimation, DSM, Storage
Integrate
• Reactive power management of the wind turbines could be incorporated in the control strategy
Platforms
• There is scope to develop the processing architecture (a Java platform perhaps)
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Break up into Streams
• Commercial stream: Remain in Riverside Room
• Technical stream : Move to Faraday Room
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