David Surplus OBE, B9 Energy Storage Ltd

CAES Demo presentation toSector Group Intelligent Energy

12/10/2016, Belfast

Table of contents• Background to B9 Energy• MATRIX Recommendation• About EU Horizon 2020 Project STORY• Distribution Network Constraint• Location of CAES• CAES control strategy overview• Curtailment and constraint• Replication at similar sub-stations• 110kV constraint alleviation• Typical compression equipment• Legacy arrangements

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Background to B9 EnergyWind farms in Northern Ireland developed by B9 Energy

Also in the Republic of Ireland:• Cark I&II Co.Donegal• Milane Hill

Co Cork• Taurbeg Co Cork• Beenageeha Co Kerry

And Canada:• Kettles Kill

Alberta

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Background to B9 EnergyAD and landfill gas projects developed by B9 Energy

Landfill Gas Utilisation Sites:Craigahullier 0.8MWCraigmore 0.8MWBallymacvea 0.8MWGreen Road 0.8MWDrumnakelly 0.635MWCulmore 0.635North Kerry 0.3MW

Granville AD – 3MW

Sustainable Energy Horizon Study recommendations:

1. Increased interconnection (N/S and E/W)2. Energy Storage3. Demand Side Management4. All working as part of an intelligent energy system

Better use can be made of the existing grid system through....

About EU Horizon 2020 Project STORY

www.horizon2020-story.eu

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Distribution Network ConstraintMap shows grid congestion in Northern Ireland resulting in:• High cost of connection• Generation capacity constraints

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Location of CAESLecale Area

33kV network33kV/11kV transformer11kV network (monitored)Solar PVWind turbineTidal turbine300 houses loadFish Factory loadSTORY CAES

Bishopscourt CentralH2020 STORY CAES

33/11kV substation – 11kV busbar

CAES Location remote from sub-station

Distance along 11kV circuit

Voltage

CAES in Generation

mode

L L L

LL

L

L L

Low Load condition

High Loadcondition

Large effect on voltage

Low effect on voltage

11kV

Reason for locating CAES at sub-station

Location of CAES

Re-locate CAES to sub-station

G

GG G

33 kV

11 kV

CAES Control Strategy /Task 3.3.3“Load on Demand“

L

L

LL

L

L

L

L

L

L L

L

G

GG G

33 kV

11 kV

G

L

LIFO Constrained off

Reverse power trigger

CAES

Dispatch from DNO

CAES Control Strategy /Task 3.3.3“Load on Demand“

L

L

L

L

L

L

L

L

L

L

L

L

G

GG G

33 kV

11 kV

G

L

Reverse power trigger

CAES

Dispatch from DNO

Overload trigger

CAES Control Strategy /Task 3.3.3“Load on Demand“

L

L

L

L

L

L

L

L

L

L

L

LL L

L L L L

G

GG G

33 kV

11 kV

G

L

CAES

Dispatch from DNO

Overload trigger

CAES Control Strategy /Task 3.3.3“Generation on Demand“

L

L

L

L

L

L

L

L

L

L

L

LL L

L L L L

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Load on demand for wind

Load on demand for PV

Load to assist DNO’s Managed Connections

Generation on demand to avoid grid upgrades

Peak-Shaving Generation

Demand reduction and standby generation

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Curtailment and Grid ConstraintsAnnual MWh losses in Ireland due to curtailment and grid constraints in 2013

Solutions are: Local “load on demand” for reverse power flow constraint, or

local “generation on demand” for thermal overloading constraint

Solution is: General “load on demand”

MW

h lo

st

CAES Control Strategy /Task 3.3.3CAES control strategy overview

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CAES Internal control system

CAES Plant

Compressor Expander

C E

Real-time CAES

External control system

Day ahead Simulator

with predictive algorithms

G59

• Wind forecast• Solar forecast• Tidal forecast• Ambient temperature

forecast• Historical load profiles

• Time of day• Ambient temperature• 11kV line voltage• SONI dispatch• DSU dispatch• DSO dispatch• Load on demand• NIE 33kV intertrip

Real world challenge:Stakeholder communication and collaboration

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• 11kV line voltage

• SONI dispatch

• DSU dispatch

• DSO dispatch

• Load on demand

• NIE 33kV intertrip

Statutory limits

Strategic Network Operation

Protection Regime

Lecale area

Replication at similar sub-stations

70 x Rural 33/11kV sub-stations

Replication at similar sub-stations

Helps with 110kV constraint alleviation

110kV Line110kV sub-station275kV Line275kV sub-station

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Typical compression equipment

Ariel JGA/4 Reciprocating Compressor

Length 1.55m, Width 2.03 m, Average weight 2130 kg, Max speed 1800 rpm, Max power 418 kW

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Legacy arrangement

• CAES demonstration project will terminate in 2020• The book value will have depreciated to zero • Local Charity CEMES set up to provide legacy arrangement• CEMES = The Centre for Excellence in Microgrids & Energy

Storage