Renewable Integration: DeGrussa Solar Project

2017-03-21 – Andrew Drager (Director)

juwi at a Glance

Wind Energy

2,000 MW of installed capacity;

100 wind parks (900 turbines);

Solar Energy

2,000 MW of installed capacity;

1,500 PV Installations;

Company

1,000 employees worldwide;

$8 billion investment volume;

Top 10 largest solar EPC.

Location: Arizona (USA) 25 MWp, single axis tracker, Ronneburg (Germany) 20 MWp,

Malaysia 10MWp Carport, Oiniades (Greece) 3MW

4,000 MWp renewable energy completed worldwide

Off-Grid Projects

Off-grid Projects: Rwanda, Chile, Namibia, Egypt, Germany

Renewable Energy Integration

6

Exit.

Speed Control

Voltage Control

Gov

Crank

AVR Sp

Ctrl

Fuel

Sync

Load Share

Unit

Vac

Vac

P%

Opn/Close

Close

Engine Controller /PLC

VacGen

VacBus

Close

Diesel Generator Control Hardware

The good old days Today

7

Speed Control

Droop CT

Close

Speed Control

Droop CT

Close

Battery Solar

Advantages

• Simple

• No Plant Controller

• No Communication

Disadvantages

• Limited Control

• Frequencey droop

Diesel Parallel Operation Droop Operation

8

Battery Solar

Diesel Parallel Operation Isochronous Operation

Advantages

• Fixed Frequency

• Optimised Dynamics

• Stability

Disadvantages

• Complex Control system

• Higher Capex

CAN-Bus

DeGrussa Solar Project

The Mine

Degrussa Mine:

Mining: Gold and copper;

Location: Doolgunna Region, WA;

Customer: Sandfire Resources NL;

Distance: 900 km North of Perth.

Power Supply:

Diesel Generators: 19MW;

Operator: 3rd party power station owner;

Avg. load: ~ 11MW;

Avg. consumption: ~ 100GWh p.a.

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The Solar Facility

Hybrid Power Plant:

PV-Modules: 10.6 MWp;

Tracking: East-West tracking;

PV-Inverter: 10 MW;

Storage: 4 MW / 1,8 MWh (6 MW peak);

Builder / Operator: juwi Australia;

Financier: ARENA, Neoen & CEFC.

Storage tasks:

Spinning reserve;

Ramp rate control;

Provide frequency support;

Power factor correction;

Diesel-off mode.

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Renewable Energy Integration at DeGrussa

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Simulation

Success:

1 minute solar yield

Optimisation

Challenges:

Diesel price forecast

Power station operation

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Solar inverters

Success:

Mass produced / off-the shelf inverters

Containerised solution

Challenges:

Energisation in mining environment

Remote fault-finding

Commissioning time required

UPS

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Battery inverters

Success:

Reliability

Containerised solution

Challenges:

DC busbar connection

Commissioning time required

Diesel-off mode control

16

Battery

Success:

Reliability and performance

HV busbar

Challenges:

Meeting the required standards

Balance of systems

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Control System

Success:

Ability for customisation

Ramp rate control

frequency support

Challenges:

Firmware upgrades impacting on system

Commissioning time required

Protection settings

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SCADA

Success:

Highly customised

Remote monitoring and reporting

Challenges:

De-bugging

Implementation of complex calculations

19

Diesel Network

Success:

Connection of HV

Dynamic spinning reserve

Challenges:

5MVA battery transformer energisation

Control system integration

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Benefits

Reduction in power costs:

Cheaper than Diesel? (subject to supply term);

Reduced exposure to power price rises:

Fossil fuel market prices;

Transport;

Exchange rate;

Current & future cost of CO2.

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Benefits

Technical Benefits

Energy security;

Improved power quality;

Better monitoring analysis;

Employee energy consciousness.

Social License

Sustainability image;

Local employment;

Increased marketing/recognition.

The Result

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The Result

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The Result

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The Result

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Thank You.

Andrew Drager

Directror

juwi Renewable Energies Pty Ltd

Level 1, 33 Queen St.

Brisbane Qld 4000

Tel. +61 7 3194 5052

Mob. +61 408 729 258

andrew.drager@juwi.com

www.juwi.com