Laurie Curro

General Manager Power System Services

Horizon Power

High RE Penetration in Horizon’s Remote Power

Systems

CS10# 4781077

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

• 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

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

Horizon Power – Expertise in Microgrids

6

Insatiable Demand for PV

& Hosting Capacity

Increasing investment

in renewables

Decreasing demand for centralised generation

Rising electricity

prices

Falling cost

of new technology

KEY

TRENDS

2015 2025 2050

Standalone

Distributed Energy Resources

Centralised

HOW WE RECEIVE ELECTRICITY WILL CHANGE

2015 2025

453,655 SOLAR CONNECTIONS IN WA BY

2025

↑142%

2015 2025

<1%

>11%

11% OF TRANSPORT NATIONALLY IS EV BY 2025

Latest Trends

Latest Trends

9

New Technology Cost Curve

CSIRO – Modelling the Future Grid Forum Workshop

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

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

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

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

Blueprints

Business as Usual

Centralised Renewables & Storage

Centralised

battery and PV

plant

Centralised

battery and PV

plant

Communications Network

Distributed Energy Resources (DER)

Blueprints

2016 2025 2050

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

Renewable Energy Optimisation

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?

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

Current Value Chain

Fuel Fuel

Gen Gen

Self

Generation

& Battery

Self

Generation

& Battery

Customer Customer

Sub

Customer

Group A

Customer

Group A

2 way flow

of energy

Third party

load

Third party

load

22

Transformer Transformer

Substation Substation

Customer

Group B

Customer

Group B Customer

Group C

Customer

Group C

Transformer Transformer Transformer Transformer

Customer Customer

Customer Customer

Self

Generation

& Battery

Self

Generation

& Battery

Customer Customer

3rd party

Renewable

Generation

Intermittent

3rd party

Renewable

Generation

Intermittent

3rd party

Renewable

Generation

Intermittent

3rd party

Renewable

Generation

Intermittent

Sw Sw

X X

Network Topology without PV/Battery

(Base Case)

Total No. of Distribution Transformers: 23

Network Topology without PV/Battery

(Optimised)

Total No. of Distribution Transformers: 12

Network Topology with PV/Battery

(Optimised Charging, Peak Load)

Total No. of Distribution Transformers: 10

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

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

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.

DER Long Term Vision

Present Day

Intelligent System Control –

Feed in Management and Storage

Battery Battery

Store excess power

Intelligent System Control - Feed in Management

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

The Highgarden Trials

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

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)

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