trials results: virtual net metering & local network … · annual energy cost outcomes by...
TRANSCRIPT
TRIALS RESULTS: VIRTUAL NET METERING & LOCAL NETWORK CREDITS
Jay Rutovitz, Institute for Sustainable FuturesAll Energy Conference 2016, Melbourne, Oct 4th 2016
The bigger picture
Background - the project & the concepts
Results
− Winton
− Cogeneration (Willoughby)
− Community solar garden
isf.uts.edu.au
OUTLINE
THE BIGGER PICTURE
TODAY:
HIGHLY CENTRALISED
NETWORK
THE FUTURE:
DECENTRALISED
NETWORK
…WITH FAR MORE
LOCAL ENERGY
Local
Energy
CLIMATE POLICY & NETWORKS
Paris Agreement: To keep global temp. rise "well below" 2oC & "endeavour to limit" rise to 1.5oC
Net zero carbon energy sector ~2050 >
• Current RE: 15%
• Future RE: 100%
We will need new REcapacity everywhere - how do we maximise the value of existing network?
isf.uts.edu.au
BACKGROUND: THE PROJECT
Local Network Credits
Local Electricity Trading
THE PROJECT: WHO’S INVOLVED
PROJECT
LEAD
MAIN
SPONSOR
CITY OF
SYDNEY
Essential Energy
Ausgrid
Energy Australia
Origin Energy
Winton Council/ LGIS
Australian Energy Council
Electricity Networks Association
Clean Energy Council
Coalition for Community Energy
Objective: To facilitate the introduction of local network charges* & Local Electricity Trading**
WHAT DID WE DO?
Five case studies, or “virtual trials”
A recommended methodology for Local Network Credits
An assessment of requirements & costs for Local Electricity Trading
Economic modelling of benefits & impacts
Increase stakeholder understanding and support for Local Network Credit rule change
** also called Virtual Net Metering or VNM
** implemented as Local Network Credits paid to the generator
THE CONCEPTS
Local Network Credits:export credits for energy
generated & consumed ‘locally’;
recognises the value in reducing
future network costs
isf.uts.edu.au
affects this
part
affects this
part
$ network
charges
$ energy
costs
$ retail
TYPICAL MAKEUP OF
ELECTRICITY BILL
Local Electricity Trading** netting off generation from one site
at another site on a time-of-use
basis, so that Site 1 can ‘sell’ or
assign generation to nearby Site 2
**also known as Virtual Net Metering (VNM)
NEEDS A CHANGE IN
ELECTRICITY MARKET
RULES
CAN HAPPEN NOW –
SOME RETAILERS
OFFER SIMPLE
VERSIONS
LGNC RULE
CHANGE PROPOSAL
Submitted July 2015 by City of
Sydney, Total Environment Centre,
and the Property Council of
Australia
Local network charges achieved via
a CREDIT TO GENERATOR
AEMC draft determination 22nd
September – rejected proposal
Need your input to the consultation!
LET: UTS ‘CUSTOMER LED RENEWABLES’
isf.uts.edu.au
Competitive procurement: specified PPA in with bill “netting off”
200kW Singleton Solar Farm Dr Chau Chak Wing Building
12% of
demand
Local Electricity Trading
Increase consumer choice
− customers can choose where their power
comes from, making energy ‘personal’
− unlocks local energy projects
− Enables stand alone community energy projects
Competitive advantage for retailers offering LET
(esp. local govt, large corporates, community
energy customer groups)
POTENTIAL BENEFITS OF LET
Local Network Credits
• Reduce future network costs and consumer costs
• Reduce load defection and maintain network
utilisation
• Unlock new local energy projects
• Unlock new product offerings e.g. neighbourhood
energy storage, LET
POTENTIAL BENEFITS OF LNC
THE TRIALS
- WINTON RESULTS
- DISPATCHABLE GENERATION
(COGEN)
- ONE TO MANY
THE TRIALSWINTON - FRINGE OF GRID
Tech Geothermal
Network Ergon Energy
Retailer Ergon Energy
Model 1 1
BYRON
Tech PV
Network Essential
Retailer Origin Energy
Model Council 1 1
WILLOUGHBY
Tech Cogen + PV
Network Ausgrid
Retailer Energy Australia
Model Council 1 1
MOIRA/SWAN HILL
Tech PV
Network Powercor
Retailer AGL
Model 1 Many
WANNON WATER
Tech Wind
Network Powercor
Retailer AGL
Model 1 2
21.9c 22.3c
19.6c18.0c
15.3c 15.2c
$0
$50,000
$100,000
$150,000
$200,000
$250,000
$300,000
$350,000
$400,000
$450,000
$500,000
Annua
l e
ne
rgy
co
st, a
ll site
s Private wire repayments & O&M
Generation costs minus income
Energy volume charge
Network volume charge (note 1)
Network capacity charge
Network & retail fixed charge
Average electricity cost (net) c/kWh
WITH LOCAL GENERATIONWITHOUT
LOCAL GENERATION
Private wire reduces Winton
Council annual energy cost
by $105k BUT network loses
$282k. Paying LNC of ~$64k
leaves both parties better off
Reduces energy
cost by 6.7 c/kWh
TRIALS RESULTS – WINTON GEOTHERMAL PROJECT ANNUAL ENERGY
COST BY SCENARIO
ALL TRIALS – IMPACT ON PROPONENTS (TOTAL ENERGY COSTS)
50%
60%
70%
80%
90%
100%
110%
Byron Shire Council
Willoughby Council
Wannon Water andGlenelg Shire Council
Winton Shire Council
WITH LOCAL GENERATIONWITH LOCAL GENERATION
BAU annual energy cost
WITHOUTLOCAL GENERATION
RESULTS: DISPATCHABLE
LOCAL GENERATION
(COGEN CASE)
0c
2c
4c
6c
8c
10c
12c
14c
16c
18c
12
AM
1 A
M
2 A
M
3 A
M
4 A
M
5 A
M
6 A
M
7 A
M
8 A
M
9 A
M
10
AM
11
AM
12
PM
1 P
M
2 P
M
3 P
M
4 P
M
5 P
M
6 P
M
7 P
M
8 P
M
9 P
M
10
PM
11
PM
c/k
Wh
Time of day
Cogen: marginal O&M cost CoGen Marginal fuel Cost
LET income + Network income (LGNC) Energy income (LET)
Energy income (Current market)
COGENERATION – LGNC IMPACT ON MARGINAL
OPERATION
Marginal
operatin
g cost
COGEN – LGNC IMPACT ON MARGINAL OPERATION
• An LGNC could meaningfully shift the operating
profile of existing dispatchable generators to
make it available at peak times
• Operating profile changes could in turn shift
system design size for new systems, so that
proponents size for efficient heat utilisation
rather than zero electrical export.
RESULTS:
ONE-TO-MANY
SOLAR GARDEN
ONE–TO-MANY (COMMUNITY SOLAR FARM)
isf.uts.edu.au
Time of use basis
HOW DOES THE MONEY WORK?
isf.uts.edu.au
Community solar farm
Time of use basisElectricity “netted off”
according to share of farm
Households/ businesses invest in farm
If share of solar farm generation greater
than house/ business consumption,
electricity “exported” and gets FIT
If Local Network Credit is paid to generator,
goes to each premise according to their share
Local Generation Certificates go to
management company (and some
electricity output if there is a shortfall)
Appears as credit on electricity bill
Network charges etc are paid just as normal
– it is just the ENERGY portion netted off
1
2
3
4
56
WHAT YOU GET FOR EACH KWH SOLAR
isf.uts.edu.au
$ network volume charges
$ energy
costs
$ retail
BEHIND THE
METER
$ network volume charges
$ energy
costs
$ retail
$ network
$ energy
costs
$ retail
Local Electricity
Trading
LET AND Local
Network Credit
WHAT WE LOOKED AT IN THE TRIAL
Investor types- Residential at home weekdays
- Residential out weekdays
- Residential out weekdays with summer AC
- Business, 5 day week
- Business, 7 day week
With and without a Local Network Credit
A larger/ smaller share
How it works for the management company
isf.uts.edu.au
BUSINESS CASE OUTCOMES
isf.uts.edu.au
$0
$1,000
$2,000
$3,000
$4,000
$5,000
$6,000
$7,000
Res - outweekdays, 1.5kW
Business, 5d week
Annual energy cost outcomes by investor profile
Annual energy costpre investment
Annual energy costwith LET
Annual energy costwith LET and LNC
Annual energy cost(solar on own roof)
5.9%
12 yrs
IRR
Simple payback
8.3%
10 yrs
10.8%
9 yrs
12.9%
8 yrs
ANNUAL ENERGY COST - OUTCOMES BY INVESTOR TYPE
OVERALL BUSINESS CASE OUTCOMES
isf.uts.edu.au
Project size = 200 kW
Before
investing
Local Electricity
Trading (LET)
LET & Local
Network Credit
Annual energy
cost ($)$314 k $278 k $272 k
Simple payback
(years)11 yrs 10 yrs
Investment rate of
return (IRR)5% to 12.3% 7.5% to 14.2%
Lifetime benefit ($) $757 k $887 k
Project cost = $382,000
94 residential and 12 business investors
KEY INFLUENCE ON INVESTOR OUTCOMES
Generator cost
What you pay for your energy without solar
What proportion of netted of electricity you
consume at your home/ business
isf.uts.edu.au
Behind the meter has better return
Not suitable for large business because
energy volume charge is low
The more LET electricity you consume on
site, the better the payback
CONCLUSION
KEY FINDINGS FROM TRIALS
Potential for distributed generation projects to meet local
consumption needs, unlikely to be realised in today’s market
Cogen likely to be undersized without something to
incentivise exports
An Local Network Credit could maintain utilisation of the grid,
and help reduce perverse incentives to go behind the meter
LET (and LNC) could unlock community energy sites and
increase access to renewable energy
isf.uts.edu.au