1. Laurie Curro
General Manager Power System Services
Horizon Power
High RE Penetration in Horizon’s Remote Power
Systems
CS10# 4781077

2. Agenda
• Who is Horizon Power
• History of Renewable Energy
• Insatiable demand for Renewable Energy
• Trends
• Storage – a game changer
• Multi-flow networks
• Control systems
• Trials and projects

3. • Western Australia's regional and remote electricity provider
• State Government-owned and commercially focused
• 38 systems of which 36 are remote microgrids
• Serve 35,000 residential connections and 9,000 businesses,
including major industry over 2.3 million square kilometres
• One customer every 53.5 square kilometres of terrain!
• Responsible for the generation, procurement, distribution and
retailing of electricity
Introduction to Horizon Power

4. POWER SYSTEMS DATA
Total installed capacity: 435MW
Total Peak Load: 275MW
Current limit on Hosting Capacity:
88MW
Comprising of
Centralised 40MW
Distributed (PV) 48MW
Current Installed Renewable Energy
Generation: 48MW
Comprising of
Hydro – 30MW
Wind – 9MW
Solar – 1MW centralised
Solar – 8MW distributed PV
Renewable Energy Hosting Capacity
All Networks

5. Horizon Power – Expertise in Microgrids
6

6. Insatiable Demand for PV
& Hosting Capacity

7. Increasing
investment
in
renewables
Decreasing
demand for
centralised
generation
Rising
electricity
prices
Falling cost
of new
technology
KEY
TRENDS
2015 2025 2050
Standalone
DistributedEnergy
Resources
Centralised
HOWWERECEIVEELECTRICITYWILLCHANGE
2015 2025
453,655SOLAR
CONNECTIONSIN WA BY
2025
↑142%
2015 2025
<1%
>11%
11%OFTRANSPORT
NATIONALLYIS EV BY 2025
Latest Trends

8. Latest Trends
9
New Technology Cost Curve
CSIRO – Modelling the Future Grid Forum Workshop

9. Smart Inverters
• Shift of intelligence and capability to the inverter
• Fronius SYMO
• Connectivity and monitoring Systems
• Home energy management
• Easy interface with Energy Storage
• Smart grid ready
• Open Data Communications – Sunspec Alliance,
SCADA and Home Automation
Reposit Power
SunVerge

10. Storage Benefits
Spinning Reserve
Peak Shifting
Renewable Smoothing
Delay Diesel Start
Network Support
Value $
Transition path to distributed energy future and storage
Diesel off options
will increase these
benefits
Storage – a Game Changer
Benefits
11

11. Continuing Journey of Storage at Horizon Power
• Carnarvon Energy Storage Trial project
– (2000kWh 2MW of Battery Storage to
optimise spinning reserve of power station
and trial utility scale renewable energy
smoothing)
• Carnarvon saturation trials
• Onslow distributed RE and storage

12. Renewable Energy Stability impact
fOPF x kWD
(Output
Fluctuation)
fDIV x ( kWA + kWB + kWC + kWD )
(Diversity Factor)
kW A
kW B
kW D
kW C
Local issue
- Voltage
fluctuations
- Power quality
- Ability to Export
Local issue
- Voltage
fluctuations
- Power quality
- Ability to Export
Upstream issues
- Voltage
fluctuations
- Frequency
response
- Reverse Power
Upstream issues
- Voltage
fluctuations
- Frequency
response
- Reverse Power

13. Blueprints

14. Business as Usual

15. Centralised Renewables & Storage
Centralised
battery and PV
plant
Centralised
battery and PV
plant
Communications Network

16. Distributed Energy Resources (DER)

17. Blueprints
2016 2025 2050
Graphs: Breakdown of Horizon Power systems per most economic business future including a 25% reduction in LCOE for DER systems.

18. Renewable Energy Optimisation

19. Distributed Generation New Network Study
• Objective: Define the most economically efficient
way to design a system as customer density and
customer PV penetration increases.
• Key Questions: Customer Density? Additional
Equipment? Suitability of existing networks?
Technical Limitations?

20. Distributed Generation – Network Design
Load Scenarios
Peak Load Average Load Minimum Load
Generation Scenarios
Maximum Gen
Output
Average Gen
Output
Minimum Gen
Output
Storage Scenarios
Maximum
Storage
Output
Minimum
Storage
Output
Balancing Charging

21. Current Value Chain
FuelFuel
GenGen
Self
Generation
& Battery
Self
Generation
& Battery
CustomerCustomer
Sub
Customer
Group A
Customer
Group A
2 way flow
of energy
Third party
load
Third party
load
22
TransformerTransformer
SubstationSubstation
Customer
Group B
Customer
Group B
Customer
Group C
Customer
Group C
TransformerTransformerTransformerTransformer
CustomerCustomer
CustomerCustomer
Self
Generation
& Battery
Self
Generation
& Battery
CustomerCustomer
3rd party
Renewable
Generation
Intermittent
3rd party
Renewable
Generation
Intermittent
3rd party
Renewable
Generation
Intermittent
3rd party
Renewable
Generation
Intermittent
Sw Sw
X
X

22. Network Topology without PV/Battery
(Base Case)
Total No. of Distribution Transformers: 23

23. Network Topology without PV/Battery
(Optimised)
Total No. of Distribution Transformers: 12

24. Network Topology with PV/Battery
(Optimised Charging, Peak Load)
Total No. of Distribution Transformers: 10

25. Multi-Flow Network Design
Base Network Optimized
Network
Optimized
Network +
Battery
Total Cost ($) 3.0 million 2.3 million 2.0 million
No. of
Transformer
23 12 10
Total Transformer
KVA
7,245 kVA 2,935 kVA 1,715 kVA
Max transformer
required
630 kVA 315 kVA 315 kVA
Conductor Size Smaller
conductor used
wherever
possible
Smaller
conductor used
due to reduced
flow

26. Multi-Flow Network – Technical Issues
• Power Quality & Fault Level Issues
– Reduced Protection Sensitivity
– Motor Starting
– Voltage Control
– Frequency Control
– Harmonics & Flicker
– Black Start
– Earthing
• Voltage & Frequency Control
• Network Optimisation, Network Losses, Optimal Generator Placement
• Real Power Balancing & Load Control
• Managing Network Demand & Customer Expectations

27. Customer & Stakeholder Expectations
• Customers are looking to take greater control of their
energy to reduce energy costs.
• Consumer demand for renewable energy is growing.
• Customers expect a choice of energy options, including
more renewable energy options.
• Customers want fewer restrictions to taking up solar.
• Customers want to see transparency, and active
communication and education of the community on
renewable and other energy options.
• Energy costs should be as affordable as possible.

28. DER Long Term Vision
Present Day

29. Intelligent System Control –
Feed in Management and Storage
BatteryBattery
Store excess power

30. Intelligent System Control - Feed in Management

31. Project Highgarden
PV on
AMI
Distributed PV & Battery Trial
(Meekatharra)
Micro-Grid Trial
Intelligent System
Control
‘Distributed Energy
Resources’ Business Future
Multi-Flow Network
DER Technology
Trial
Stand-alone Power
Systems
Modular Generation
Capacity
High Penetration
Renewable Energy &
Storage
1.Business Model Development
2.Market Platform
Intelligent Consumer
Services
Onslow
Demonstration
1.DER Monitoring and
Control
2.Protection Studies
3.Remote Sensing
4.Feed-In Management
1.Distributed Generation
Review
1.Network Design
Optimisation
1.Generation Philosophy
2.Commercial Model
Assessment
1.Esperance SPS
Trial
2.NIS SPS Trial
Onslow DER

32. The Highgarden Trials

33. Customers – Technical Requirements
• Feed in Management
• Sunspec
• New requirements under AS4777 – Settings
• Inverter reactive power capability
• Extended Ramp Rate Installations
• Changeover switches
• Updated Testing Requirements
• Updated Information requirements for Class III

34. Onslow Microgrid Works
Main elements of scope:
• To be constructed in 2017 (already tendered –
award planned for December 2016):
– Power station located in Lot 555 (expandable
for the future)
– Transmission line (tendered both O/H & U/G
– TBA)
– Zone substation located in Lot 880
– Network extensions into the town (U/G)
• To be constructed in 2018:
– Solar and Battery Storage (siting feasibility
studies underway – construction 2018)
– Gas lateral: 23km 4” pipeline (complete - by
others) and 87 km of 6 inch pipeline (existing)

35. 38
Thank You & Questions
Laurie Curro
General Manager Power System Services
0061 8 6310 1530
laurie.curro@horizonpower.com.au
Marble bar centralised solar farm at night