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Flow Batteries Operational experience at the edge of the grid - PowerPoint PPT Presentation

Flow Batteries Operational experience at the edge of the grid Chris Winter RedFlow Limited Smart Grid, Smart Cities Project - Australia Aim: to gather information about the benefits and costs of different smart grid technologies


  1. Flow Batteries Operational experience at the edge of the grid Chris Winter RedFlow Limited

  2. Smart Grid, Smart Cities Project - Australia • Aim: to gather information about the benefits and costs of different smart grid technologies (including 20 ESS energy storage) in different Australian urban settings 40 ESS • 2 sizes of Energy Storage o Distributed – kW class residential 1 ESS o Network – 200kW container

  3. 7 Aims of Energy Storage Trial in SGSC is to quantify… Reduction in peak demand – energy storage as a cost-effective and 1. reliable alternative to network capacity expansion 2. Improvement in network reliability/voltage/power factor/power quality – cost-effectiveness and value of energy storage Energy supply during peak price events – net benefit to retail sector 3. Minimisation of customers’ energy bills – with innovative tariffs e.g. 4. time of use together with energy storage. 5. Combined benefit between consumer, retail and network sectors Investigation of large capacity (~1MVA) storage – extra cost and 6. other benefits compared to smaller capacity storage Intermittent generation support – optimisation of renewable energy 7. sources value

  4. RedFlow Energy Storage Deployments Newcastle Installations • 61 x 5kW/10kWh ZBM ESS installed in Newcastle, Scone and Sydney • Sydney: Newington Smart Home operational 20 months • Newcastle: ESS operational since February 2012 (staggered daily cycling) • Scone ESS: Will test island operation of network

  5. Results – System Availability ZBM and ESS Availability - Newcastle and Scone 50 Number of Units 40 30 20 10 0 29-Feb 4-Mar 8-Mar 12-Mar 16-Mar 20-Mar 24-Mar 28-Mar 1-Apr 5-Apr 9-Apr 13-Apr Newcastle ZBM Available Newcastle ESS Available Scone ZBM Available Scone ESS Available ZBM and ESS Availability - Newcastle and Scone 60 Number of Units 50 40 30 20 10 0 29-Feb 4-Mar 8-Mar 12-Mar 16-Mar 20-Mar 24-Mar 28-Mar 1-Apr 5-Apr 9-Apr 13-Apr Newcastle ZBM Available Newcastle ESS Available

  6. Results – 15% Evening Peak Reduction Grid-Feed Period – Monday 9 April 2012 65 Residential customers 90 80 Peak Reduction: 70 15.19% 60 50 kW 40 30 4 ESS Charge 20 2kW / ESS (8kW total) 2am – 8am Mon-Fri 10 0 3:40 PM 4:10 PM 4:40 PM 5:10 PM 5:40 PM 6:10 PM 6:40 PM 7:10 PM 7:40 PM 8:10 PM 8:40 PM 9:10 PM 9:40 PM 10:10 PM Real Power (kW) with Storage Real Power (kW) without Storage 4 ESS grid-feed 3kW / ESS (12kW total) 9kW: 4pm – 7:20pm 3kW: 7pm – 10:20pm Monday-Friday

  7. Results – Interesting Observation Automatic Off-Peak Hot Water Systems 140 120 Off-Peak Hot Water Systems 100 43.29% increase of 6pm peak 80 kW Peak Reduction in Previous Slide 60 40 20 Monday 9 April Tuesday 10 April Wed 11 April 0 12:00 AM 6:00 AM 12:00 PM 6:00 PM 12:00 AM 6:00 AM 12:00 PM 6:00 PM 12:00 AM 4 ESS grid-feeding Real Power (kW) with Storage Real Power (kW) without Storage 3kW / ESS (12kW total) 9kW: 4pm – 7:20pm 3kW: 7pm – 10:20pm Monday-Friday

  8. Results – Effect of Energy Storage Effect of Storage on Grid Real Power 120 Off-Peak Hot Water Systems 100 80 kW 60 40 20 Friday 6 April Saturday 7 April Sunday 8 April Monday 9 April Tuesday 10 April Wed 11 April Thursday 12 April Fri 13 Apr 0 12:00 AM 3:30 AM 7:00 AM 10:30 AM 2:00 PM 5:30 PM 9:00 PM 12:30 AM 4:00 AM 7:30 AM 11:00 AM 2:30 PM 6:00 PM 9:30 PM 1:00 AM 4:30 AM 8:00 AM 11:30 AM 3:00 PM 6:30 PM 10:00 PM 1:30 AM 5:00 AM 8:30 AM 12:00 PM 3:30 PM 7:00 PM 10:30 PM 2:00 AM 5:30 AM 9:00 AM 12:30 PM 4:00 PM 7:30 PM 11:00 PM 2:30 AM 6:00 AM 9:30 AM 1:00 PM 4:30 PM 8:00 PM 11:30 PM 3:00 AM 6:30 AM 10:00 AM 1:30 PM 5:00 PM 8:30 PM 12:00 AM 3:30 AM 7:00 AM Real Power (W) with Storage Real Power (W) without Storage 4 ESS grid-feeding 3kW / ESS (12kW total) Embedded Generation 11kW Solar 9kW: 4pm – 7:20pm 11kW Solar 3kW: 7pm – 10:20pm Monday-Friday

  9. Learnings – overall a successful deployment • Employ specialist installers o This has been highly beneficial in the roll-out of systems • Battery system supplier should have real-time access to project data o Open transfer of project data should be established prior to project commencement • Most ESS faults due to power electronics and system issues, not ZBM o Work with utility-qualified System Integrators • Ensure alert system also responds to minor faults o Alert system exists for major faults but minor operational faults have been time-consuming to find • Importance of load study prior to project commencement o Although this is only a demonstration project, peaks on this feeder actually occur during off-peak times

  10. RedFlow - Expanding towards MW-scale

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