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Case Study - DeGrussa Solar Hybrid ProjectEnergy and Mines World Congress
22-11-2016 – Peter Drager
juwi Renewable Energy Pty Ltd
juwi at a Glance
Wind Energy
1,800 MW of installed capacity;
100 wind parks (840 turbines);
Solar Energy
1,700 MW of installed capacity;
1,500 PV Installations;
Company
1,000 employees worldwide;
$7 billion investment volume;
Top 3 largest solar EPC.
juwi Renewable Energy Pty Ltd
Consulting &
AcquisitionPlanning Development
Financing &
SalesConstruction
Operations &
Service
Our Renewable Energy Activities
juwi Renewable Energy Pty Ltd
Global leader in Off-Grid Projects
Off-grid Projects: Rwanda, Chile, Namibia, Egypt, Germany
juwi Renewable Energy Pty Ltd
DeGrussa Project: Mine Site Background
Degrussa Mine:
Mining: Gold and copper
Location: Doolgunna Region, WA
900 km North of Perth
Owner/Operator: Sandfire Resources NL
Power Supply:
Diesel Generators: 19MW
Operator: KPS
Avg. load: ~ 11MW
Avg. consumption: ~ 100GWh p.a.
Diesel Power Supply Constraints:
• High price (and likely to increase);
• Fluctuating prices;
• Supply unreliable (trucked to site).
juwi Renewable Energy Pty Ltd
DeGrussa Project: The Solution
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)
Primary Purpose: To reduce diesel consumption of the mine
Builder / Operator: juwi Australia
juwi Renewable Energy Pty Ltd
DeGrussa Project: The Solution
Low Penetration High Penetration
• Low Penetration
• Simple control mechanism
• No Control System required
• No BESS necessary
• Low Capex
• High Capex
• Complex control system
• Storage Necessary
• Diesel off-mode possible
• Solar Smoothing
• High Penetration
CAPEX
Grid
support
Solar
Penetration
Fuel
Savings
high
>50%
high
Up to 100%
CAPEX
Grid
support
Fuel
Savings
low
<7
%
low
15
%
Power ratio PPV/PGen
Solar
FractionUp to 100%Solar
Fraction
<7
%
Solar
Penetration
Medium Penetration
• Low Capex
• Fuel Save Controller
• No Solar Smoothing
• No Storage Necessary
• Diesel off-mode possible
• Medium Penetration
CAPEX
Grid
support
Solar
Penetration
Fuel
Savings
low
>25%
Up to
50%
low
Solar
Fraction
Up to
25%
DeGrussa Project: System Components
“Standard” Solar PV System
• 34,080 polycrystalline modules;
• Distributed DC Combiner boxes;
• 5 x 2MW containerized inverter stations with Tx station;
Proven Battery/Battery Inverter technology
• 2 x 2MW (3MW peak) Grid forming battery inverters;
• 2 x 900kWh (3.6mw Peak) LI-ion battery containers.
Solar/Hybrid Controller:
• Distributed controllers;
• Remote monitoring and control;
• Functionalities include spinning reserve control, solar
smoothing (ramp rate control), frequency control, reactive
power control and priority dispatch of solar PV energy.
juwi Renewable Energy Pty Ltd
DeGrussa Project: Control System Design
Night Time Operation
• 100% reliant on Diesel Power Station
• Battery Station provides Frequency and Reactive
Power Support
• Option for Battery Station to provide additional spinning
reserve.
juwi Renewable Energy Pty Ltd
DeGrussa Project: Control System Design
Daytime Operation
• Mine operations reliant primarily on the Diesel Power
Station;
• Solar PV generation maximized through optimum
function of the integration philosophy;
• Key constraints that determine the PV production
include the mine load, minimum diesel loading,
minimum number of generators online and the
required spinning reserve.
• Spinning reserve requirement of 100% coverage of
solar PV output + buffer outlined by Sandfire;
• Ramp rate determined by Diesel Power Station
constraints (limited by storage/spinning reserve
capacity);
• “Diesel off mode” possible.
juwi Renewable Energy Pty Ltd
DeGrussa Project: The Corp Development Structure
Project SPV
ARENA
Equity
Diesel Genset IPP
Debt
EPC Contractor
Offtaker O&M contractor
juwi Renewable Energy Pty Ltd
DeGrussa Project: Development Timeline
juwi Renewable Energy Pty Ltd
2014 2015 2016 2021
MO
U s
ign
ed
Gra
nt fu
nd
ing
ag
reem
ent sig
ned
PP
A s
ign
ed
EP
C C
ontr
act sig
ned
and
co
nstr
uction
sta
rt
Co
nstr
uction
co
mp
letion
and
ene
rgis
ation
Pra
ctical C
om
ple
tion
Co
mp
letion
of In
itia
l T
erm
The Result – Site View
juwi Renewable Energy Pty Ltd
The Result – Solar Facility
juwi Renewable Energy Pty Ltd
The Result – Battery Station
juwi Renewable Energy Pty Ltd
Challenges – Brownfield Projects on Minesites
Cost savings are not material compared with business turnover;
Mine life restricting PPA length;
Non-core business drain on time and money;
Little technical understanding of renewable energy;
Additional construction/operational requirements compared with standard solar PV projects.
juwi Renewable Energy Pty Ltd
Challenges – Hybrid Project Commercials
Financing
• Higher risk (potential for a stranded asset);
• Limited Hybrid Renewable energy experience;
• Guarantee requirements become complex;
• Complex Due diligence requirements;
• Complex legal negotiations.
System Cost
• Engineering - Substantial design process;
• Additional equipment (battery, inverters etc.);
• Installation costs (labor, transport etc.);
• Logistics - Remote operation and maintenance;
juwi Renewable Energy Pty Ltd
Challenges - Solar PV Production
Soiling losses in dusty region with heavy equipment;
Solar curtailment due to constrained grid;
Longevity of equipment in harsh conditions;
(vegetation management not an issue)
juwi Renewable Energy Pty Ltd
Project Benefits
Reduction in power costs:
Cheaper than diesel generation (subject to diesel price
and PPA term);
PPA price is fixed for the contract term;
Auxiliary benefits not quantified in financial model
(reactive power control, frequency control)
Reduced exposure to power price rises:
Fossil fuel market prices;
Transport;
Exchange rate;
Current & future cost of CO2.
juwi Renewable Energy Pty Ltd
Project Benefits (cont’d)
Technical Benefits
Energy security;
Improved power quality and power system reliability;
Better monitoring analysis;
Employee energy consciousness;
Supplier/ experience for future projects.
Social License
Sustainability image (“the solar mine”);
Local employment;
Increased marketing/recognition.
juwi Renewable Energy Pty Ltd
Additional Resources
juwi Renewable Energy Pty Ltd
Project Overview YouTube video
https://www.youtube.com/watch?v=9ljiQ86L78Y&feature=youtu.be
juwi Press Release
http://www.juwi.ae/articledetail/largest-off-grid-solar-project-complete-3/
Sandfire Solar Project Info Page
http://www.sandfire.com.au/operations/degrussa/solar-power-project.html
Thank You!
Peter Drager
Business Development Manager - Australia-South Pacific
juwi Renewable Energies Pty Ltd
Level 8, 110 George St.
Brisbane Qld 4000
Tel. +61 7 3107 0908
Mob. +61 432 068 155
www.juwi.com
juwi Renewable Energy Pty Ltd
