bruny island energy forum · trial on a page arena funded under research & development round...
TRANSCRIPT
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March 2020
Bruny Island Energy Forum
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Agenda
• The CONSORT project: learnings and outcomes
• The cable: Current status, future plans
• Round table discussion
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Trial on a page
ARENA funded
Under Research & Development round
~7.9m total value. $2.9m ARENA funding
April 2016 – April 2019
3 year research/2 year trial
Manage cable load and Diesel use
Collaboration: ANU, USyd, UTAS, Reposit Power,
TasNetworks
~150 kW battery capacity
~35 customers
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The network
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Installation
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Technically: how did we go?
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Controlling a battery for fun and profit
Electricity price (tariff)
Solar generation
Battery actions (charge/discharge)
Icons made by Freepik, prettycons from www.flaticon.com is licenced by CC 3.0 BY
The Repositcontroller
takes inputs
And determines how to use them
to save money using the battery
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Controlling a battery for fun and profit – network version
Electricity price (tariff)
Solar generation
Battery actions (charge/discharge)
Now battery also responds to
network events
Icons made by Freepik, prettycons from www.flaticon.com is licenced by CC 3.0 BY
Add a network input
Network constraint
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Value-reflective payments
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What’s phase anyway?
Customers are connected between two phases
But only one phase is constrained
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Why participate? Drivers
Financial Environment/Sustainability Community care/value Interest in technology Desire to be part of the trial
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And how did you feel about it all?
Relaxed, confident with minimal criticisim
3%
Relaxed, confident with some criticisim
70%
Anxious, cautious but offset by other
benefits 21%
Anxious, cautious and unconvinced
6%
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What’s next – for demand response
• Operationalisation
Reduce cost
Increase diversity of sources
• Explore other parts of the network
• East coast
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What’s next – for Bruny Island
• Participants Customers own Solar/battery systems. While cable is being replaced demand response is still valuable
• Cable failure/future plans Michael will talk about
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What happened, what’s next
Presenter: Michael Verrier – Senior Asset Strategy Engineer
Cable Failure
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Tinderbox-Dennes Point 11kV submarine cable fault
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Tinderbox-Dennes Point 11kV submarine cable fault
• On Saturday 2nd November, a red phase to earth fault occurred
• Testing confirmed that the fault was within the submarine cable.
• Divers were sent down to investigate at estimated location.
• What they found…….
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Tinderbox-Dennes Point 11kV submarine cable fault
Video of suspect @ 13:26
Faulted section Original cable sample
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Tinderbox-Dennes Point 11kV submarine cable fault
• We have mobilised additional diesel generators to support the island under contingency situations.
• We have recently installed more remote operated devices on Bruny Island which will assist with faster restoration times should a fault occur.
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Tinderbox-Dennes Point 11kV submarine cable fault
• There is a need to replace the failed cable now to return to a secure supply arrangement.
• We have sent divers down to inspect and report back on the remaining in-service cable.
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Tinderbox-Dennes Point 11kV submarine cable fault - replacement
• Lots to consider, including;• Marine survey (Bathymetry)
• Geotech survey
• Heritage, aboriginal and environmental considerations
• On-land considerations • Feeder and substation demands
• Route/s
• Constructability - Specialised installation method and crew
• Operability
• Maintainability
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Tinderbox-Dennes Point 11kV submarine cable fault - replacement
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Future plans
Presenter: Michael Verrier
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Future plans
• We are still undertaking preliminary investigations into maintaining security of supply to Bruny Island
• This includes investigating replacing the second cable and alternatives.
• We are committed to engaging with all stakeholders once there is more information to share.
• And expect we will be in a position to share more information on the failed cable replacement with you again early in the new financial year
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Future plans
• You can contact our customer contact centre at any time on 1300 137008 to discuss further with us.
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Discussion starters: questions
• About CONSORT
• Did any learnings surprise you? Is there perspective you can add?
• About demand response
• As our only active demand response scheme: Can you give us any thoughts on a wider rollout?
• About the cable failure:
• Any burning questions on future Island supply needs?
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Thank you