The document summarizes a presentation given by David Surplus about a compressed air energy storage (CAES) demonstration project in Northern Ireland. It provides background on B9 Energy and their wind and gas projects. It then discusses the STORY EU Horizon 2020 project, which is demonstrating CAES to alleviate distribution network constraints in the Lecale area. It outlines the CAES control strategy to provide load or generation on demand based on signals from the distribution network operator. Finally, it discusses plans for replicating the project at other substations and establishing a legacy arrangement after the demonstration project ends in 2020.

1. David Surplus OBE,
B9 Energy Storage Ltd
CAES Demo presentation to
Sector Group Intelligent Energy
12/10/2016, Belfast

2. 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
2

3. Background to B9 Energy
Wind farms in Northern Ireland developed by B9 Energy
3
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

4. Background to B9 Energy
AD and landfill gas projects developed by B9 Energy
4
Landfill Gas Utilisation Sites:
Craigahullier 0.8MW
Craigmore 0.8MW
Ballymacvea 0.8MW
Green Road 0.8MW
Drumnakelly 0.635MW
Culmore 0.635
North Kerry 0.3MW
Granville
AD – 3MW

5. Sustainable Energy Horizon Study
recommendations:
1. Increased interconnection (N/S and E/W)
2. Energy Storage
3. Demand Side Management
4. All working as part of an intelligent energy system
Better use can be made of the existing grid system through....

6. About EU Horizon 2020 Project STORY
www.horizon2020-story.eu
17.10.2016 6

7. Distribution Network Constraint
7
Map shows grid congestion in
Northern Ireland resulting in:
• High cost of connection
• Generation capacity constraints

8. Location of CAES
Lecale Area
8

9. 33kV network
33kV/11kV transformer
11kV network (monitored)
Solar PV
Wind turbine
Tidal turbine
300 houses load
Fish Factory load
STORY CAES
Bishopscourt Central
H2020 STORY CAES

10. 33/11kV
substation –
11kV busbar
CAES Location
remote from
sub-station
Distance along
11kV circuit
Voltage
CAES in
Generation
mode
L L L
L
L
L
L L
Low Load
condition
High Load
condition
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

11. G
GG G
33 kV
11 kV
CAES Control Strategy /Task 3.3.3
“Load on Demand“
L
L
L
L
L
L
L
L
L
L L
L

12. 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

13. 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
L
L L
L L L L

14. 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
L
L L
L L L L

15. 15
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

16. Curtailment and Grid Constraints
16
Annual 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”
MWhlost

17. CAES Control Strategy /Task 3.3.3
CAES control strategy overview
17
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

18. Real world challenge:
Stakeholder communication and collaboration
17.10.2016 18
• 11kV line voltage
• SONI dispatch
• DSU dispatch
• DSO dispatch
• Load on demand
• NIE 33kV intertrip
Statutory limits
Strategic Network Operation
Protection Regime

19. Lecale
area
Replication at similar sub-stations

20. 70 x Rural 33/11kV
sub-stations
Replication at similar sub-stations

21. Helps with 110kV constraint alleviation
110kV Line
110kV sub-station
275kV Line
275kV sub-station

22. Typical compression equipment
Ariel JGA/4 Reciprocating Compressor
22
Length 1.55m, Width 2.03 m, Average weight 2130 kg,
Max speed 1800 rpm, Max power 418 kW

23. Legacy arrangement
23
• 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