Case Study - DeGrussa Solar Hybrid Project

Transcription

1 Case Study - DeGrussa Solar Hybrid Project Energy and Mines World Congress Peter Drager

2 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.

3 Our Renewable Energy Activities Consulting & Acquisition Planning Development Financing & Sales Construction Operations & Service

4 Global leader in Off-Grid Projects Off-grid Projects: Rwanda, Chile, Namibia, Egypt, Germany

5 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).

6 DeGrussa Project: The Solution Hybrid Power Plant: PV-Modules: Tracking: PV-Inverter: Storage: Primary Purpose: Builder / Operator: 10.6 MWp East-West tracking 10 MW 4 MW / 1,8 MWh (6 MW peak) To reduce diesel consumption of the mine juwi Australia

7 DeGrussa Project: The Solution Low Penetration Solar Penetration 15 % Medium Penetration Solar Penetration Up to 50% High Penetration Solar Penetration Up to 100% Solar Fraction <7 % Solar Fraction Up to 25% Solar Fraction Up to 100% Fuel Savings <7 % Fuel Savings >25% Fuel Savings >50% CAPEX low CAPEX low CAPEX high Grid support low Low Penetration Simple control mechanism No Control System required No BESS necessary Low Capex Power ratio P PV /P Gen Grid support low Low Capex Fuel Save Controller No Solar Smoothing No Storage Necessary Diesel off-mode possible Medium Penetration Grid support high High Capex Complex control system Storage Necessary Diesel off-mode possible Solar Smoothing High Penetration

8 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.

9 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.

10 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.

11 DeGrussa Project: The Corp Development Structure Equity ARENA Debt Offtaker Project SPV O&M contractor Diesel Genset IPP EPC Contractor

12 MOU signed Grant funding agreement signed PPA signed EPC Contract signed and construction start Construction completion and energisation Practical Completion Completion of Initial Term DeGrussa Project: Development Timeline

13 The Result Site View

14 The Result Solar Facility

15 The Result Battery Station

16 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.

17 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;

18 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)

19 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.

20 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.

21 Additional Resources Project Overview YouTube video juwi Press Release Sandfire Solar Project Info Page

22 Thank You! Peter Drager Business Development Manager - Australia-South Pacific juwi Renewable Energies Pty Ltd Level 8, 110 George St. Brisbane Qld 4000 Tel Mob peter.drager@juwi.com