Alistair Steele

Network Connected Batteries

2008

SSEPD Energy storage projects

2010

2011

2012

100 kW Flow Battery

1 MW NaS Battery 2 MW Lithium Battery

3 x 25 kW Lithium Batteries

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

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

Low voltage connected battery projectCommunications schematic

Low voltage connected battery projectG59/2 commissioning

Low voltage connected battery projectG59/2 commissioning

Low voltage connected battery projectSafety & comms testing

• 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

Next steps

• 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

Summary

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