Network Connected Batteries
Alistair Steele
SSEPD Energy storage projects
1 MW NaS Battery
2 MW Lithium Battery
2011
2008
2010
2012
3 x 25 kW
Lithium
Batteries
100 kW Flow Battery
Shetland 1MW
Battery
Installed 1 MW / 6 MWh NaS battery
• Significant safety incident in Japan has halted progress
• Currently awaiting results of detailed investigation
before making a decision on project status
LV Connected
Energy Storage
Project drivers
• The uptake of low carbon technologies is already having an impact
on how we operate our LV networks:
- Solar PV
- Heat pumps
- Electric vehicles
• Traditional solution is to replace cable / associated plant
• Can energy storage be used to mitigate these effects?
• Is there an operational / economic case over existing solutions?
Overview
•
Small array to prove functionality
• 3x single phase, 25kVA batteries
connected at 230V
•
Located towards the end of the circuit
for SSE Zero Carbon Homes project
•
Determine operational issues and
benefits:
• Peak lopping demand &
generation
• Voltage support from real /
reactive power
• Aggregated reduction in peak
demand and phase balancing
Low voltage connected battery project
Network location of the batteries
Low voltage connected battery project
Network location of the batteries
Low voltage connected battery project
Site photographs
Low voltage connected battery project
Installation photos – Chalvey, Slough
Low voltage connected battery project
Installation photos – Chalvey, Slough
Low voltage connected battery project
Communications schematic
Low voltage connected battery project
G59/2 commissioning
Low voltage connected battery project
G59/2 commissioning
Low voltage connected battery project
Safety & comms testing
Next steps
• Presently have a comms fault internal to the battery in two of the
units
• Working with manufactured to resolve situation
• Basic test programme started July 2012 – moving into detailed
testing of the units to flatten demand and manipulate voltage
• Learning will feed into the larger project rollout under Tier 2
Summary
• Project within timescales / budget
• Safety case / risk assessment completed
• All three battery units successfully installed
• Manufacturer commissioning and G59 compliance completed
• Radio communications working as intended
• Enmac integration complete
• Test programme to run for 2 years
• Formal learning report released 2014
Orkney Energy
Storage Park
Orkney battery - Technology
Orkney battery - Service Based Contract
• Battery not owned or operated by network business
• Service procured – Constraint management
• Battery owner free to trade across multiple markets
Thank you very much
for your attention