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Andy Kondola
A network perspective
State Government-owned corporation that builds, maintains and operates electricity network throughout majority of south Western Australia
Governed by an independent Board and reports to Minister for Energy, as owner’s representative
Serving more than one million customers across a network area of 254,920 km2
Customer-orientated organisation that provides a safe, reliable and affordable electricity supply to Western Australians
Provides an essential service through transmission and distribution of electricity across our vast infrastructure of poles, wires, substations and depots
Who we are – Western Power
2
Western Power - What we do
Power Generation Retailer
Western power An energy trading platform
Our Customers
While PV installation rate increasing
Power consumption plateauing
Western Power Network Trend Change in Peak Load Demand
1
CAGR = Compound Annual Growth Rate; FYE = Financial Year Ending
Alternative regression measures of trend growth suggest trend growth rate between 1% to 2% per year
Underlying connection growth rate is 3.8% per year
FYE1999 -2003
2003 -2007
2007 -2011
2011 -2015
CAGR 5.4% 6.5% 2.8% 0.2%
Grid volumes are declining
Western Power’s per connection residential grid consumption has declined 17% over the last 5 years.
Total grid consumption is expected to continue to decline, despite population growth increasing connections.
Source: Western Power forecasts 2016
SWIS per connection consumption is declining
6,223
3,500
4,000
4,500
5,000
5,500
6,000
6,500
2009 2011 2013 2015
kWh
SWIS residential consumption trendAnnual, per capita 2009-2015
Commercial consumption per connection is also forecast to decline by ~1% a year.
17%
Peak demand is placing upwards pressure on investment2
Peak demand
MW
Peak demand is increasing in certain areas
Peak network demand is primarily a function of climate extremes year on year but exhibits small underlying growth rate in line with WA population trends, despite decreasing consumption. Peak demand is increasing in 6 of 15 load areas.
Network peak demand
Source: Western Power forecasts 2016
Peak demand can be extremely volatile
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
0
5,000
10,000
15,000
20,000
25,000
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
Actual electricity consumption
Forecast electricity consumption
Peak demand (MW)
PoE10 Forecast
Total grid consumption
GWh
PV installation rates for WA increasing
Source: Australian Energy Council Solar PV Report – June 2016
WA
QLD
VIC
Economics of emerging technologies in WA
Non network solutions make economic sense in edge of grid areas
Large areas of the network cost more to replace/maintain than the revenue collected by Synergy through the retail tariff
Current SWIS model• Central mesh
network • Long transmission
links and branch network radiating from core area
• Fully integrated, sharing generation capacity
Future model with small number of islanded systems
• Bulk of network unchanged
• SPS and islanded micro-grids created at periphery
• Outlying branches disconnected to avoid capital expenditure
Extreme model without centralised network
• Multiple micro-grids / smaller connected systems
Stand alone power systems
(SPS)
Micro-
gridMesh
network
Branch network
Future model with variable network types
• Some SPS and micro-grids in periphery of network
• Thin pipe connections to areas with local generation and storage
Integrated Network Fringe Disconnection Modular Network Fully Decentralised
Possible evolution of WA’s network
The Western Power of the future…
Modular Network Future model with variable network types:
Strongly meshed urban distribution networks;
Some SPS and micro-grids in periphery of network;
Thin pipe connections to areas with local generation and storage;
Micro-grids developing with infill projects; and
Continued relevance of transmission networks in some areas.
Stand alone power systems (SPS)
Micro-grid
Mesh network
Branch network
Our emerging tech projects
MicrogridWhite Gum Valley
BESS battery storage Perenjori
Large scale MicrogridKalbarri
Demand Management trialMandurah
Microgrid with scale renewablesCarnegie Wave Farm
Stand Alone Power SystemRavensthorpe
Mandurah
White Gum Valley
Fremantle
Perenjori
•••
•
•
•
Power flow
Critical circuit
LEGEND
Kalbarri’s Microgrid
GERALDTON
New
New
Existing
Existing
Business
Homes
Key assumptions
1. Generation will be over-sized for town’s peak to provide a commercial incentive to private generation.
2. The 33kV line will remain in service as the predominant operating mode (Kalbarri as a day-time generation centre).
3. Battery and energy management system will address (under commercial arrangements with generators) voltage and frequency support for the system.
4. The microgrid is intended to provide reliability of supply comparable to that of Geraldton – ie not a perfect solution.
Battery Energy Storage System (BESS) Pilot - Perenjori
Will help us gain experience using battery storage on the network, how does it interact and perform?
We expect this to improve power reliability for our customers in Perenjori
We expect this will successfully defer capital investment
Perenjori•
Stand alone power system pilot
The trial will test
Reliability improvements for customers
Costs and benefits compared to maintaining overhead powerlines
If it is the right solution for specific customers in rural and regional areas
Budget: $4.0 M
Timeline: June 2017 – pilot complete
Great Southern and Southern Wheatbelt
ONGERUP
Emerging tech gives us opportunities to defer capital expenditure
Stand alone power systems may present a lower-cost alternative to rebuilding long rural supply lines
Mandurah non-network options project seeking consumer-side peak management alternatives to traditional network expansion
Working with developers to explore options to reduce the peak demand impacts of new developments
Exploring the potential for microgrids and network-scaled energy storage to deliver reliability improvements that have hitherto been unattainable because of the cost of traditional options
Potentially reducing the need to build traditional poles and wires solutions
Electricity Networks Corporation trading as Western Power
ABN 18 540 492 861
24/7 Emergency Line 13 13 51
General Enquires 13 10 87
TTY 1800 13 13 51
TIS 13 14 50
Email [email protected]
Website westernpower.com.au