Steve McRea, Ingenero - CASE STUDY | 500kW hybrid solar farm on the Island of Vava’u, Tonga
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Transcript of Steve McRea, Ingenero - CASE STUDY | 500kW hybrid solar farm on the Island of Vava’u, Tonga
Vava’u PV Project
Fraser Coast Community Solar Farm
• 500kW of PV • 100kW of baFery for 20 minutes • Ground mounted • Fully integrated with diesel power staIon
IntegraIon control systems ProtecIon systems
• Funded by Abu Dhabi Future Energy Company (Masdar)
• Owned by Tonga Energy Road Map ImplementaIon Unit (TERM IU)
• Operated by Tonga Power Limited
Funding and Ownership
• Up to 70% of noon Ime load of the enIre grid supplied by PV
• Approximately 13% of the grid energy is now solar power
High PenetraBon of PV
Snapshot: About Ingenero
• Power company specialising in Solar Electricity GeneraIon
UIlity Scale, Commercial and Industrial RooWop & ResidenIal
Experienced in both Electricity Sales (PPA’s) and turnkey projects Technically strong
• Across technologies • Around broader systems aspects of monitoring, electrical engineering
and network connec9vity
• Solar design • Financial engineering
• Project management
• Strong & experienced management team UIlity experience in power, data and telecommunicaIons
• The leading Solar EPC company in Australia due to breadth of installaIons and technology
• Scalable for growth regardless of territory
Ingenero – A brand you can trust
Government & UBliBes ConstrucBon
Commercial RooMops
EducaBon Airports Retail
Kingscote Airport
• More stakeholders…..greater potenIal for misalignment 6 stakeholders Myriad of ideas….all slightly wrong Alignment comes with understanding the real Genset operaIng
environment
• Clarity of specificaIon and KPI’s a must Especially around storage performance
Economic benefit
• Ge`ng the spinning reserve vs PV output a key Counter intuiIve Sacrifice PV output to achieve safety and efficiency of the Gensets
3.9kwh per litre to 3.75 kwh per litre Economic benefit was more fuel per unit for energy produced BUT
providing less overall power
Macro Level ObservaBons
Three major components that need to interact properly if all the economic benefits are to be achieved;
• PV and the related intermiFency
• Diesel and it’s ability to compensate for PV in Ime
• Storage and it’s ability to bridge the gap
• Solar generaIon components
• Storage design • Control systems
• ProtecIon systems
• Standards
OperaBonal Philosophy
• Irregular shipping schedules Three or four ports to enter
• Long transit Imes 60/80 days Greatest exposure Project management key
• LiFle local availability of parts Coupled with long transit Imes a potenIal project killer
Staging and warehouse management plan
• Local idiosyncrasies Port Customs
Local transport
LogisBcal Challenges
• Site management a key project hire
• Totally new set of tasks and process skills needed vs. local capabiliIes Conscious of communicaIons
Seek cultural alignment as much as possible
• Local training Ongoing commitment for the life of the project
• Use of local materials vs. imporIng The baFery house example
Speed of local approvals Availability of local building skills
• Use of equipment vs. manpower trade off The mounIng frame example
Uncertainty around quality of local labour
ConstrucBon Challenges
• Because of the nature of the funding sources there is the potenIal for disconnect with the local uIlity # of parIes involved Funding Local government policy units
Local uIlity Project developer or solar EPC contractor Local interest groups
• Typical areas of UIlity uncertainty that needs to be addressed Core renewable technology Impact on diesel operaIng efficiency
Impact on network stability
Local standards implicaIons
• When the project is complete the UIlity must own the design and operaIng philosophy on an ongoing basis
Bringing the local uBlity along on the journey
• NaIonal cultures
• Workplace pracIces Safety Risk Breaks Clothing LeWover materials
• Language and respect Hierarchical with Itles ConsultaIve approach Verbal respect
• CelebraIng success How / what is the local definiIon The pig roast example
Work hard at cultural alignment
• Success or otherwise will come down to the operaIon and site management philosophy of the EPC contractor
• Ingenero approach was to leave a legacy of transferred skills Limited but prudent use of Ingenero staff
• Site manager • Project manager • Solar design/architect
Very careful selecIon of local contractors • Up-‐skilling the workforce
Making safety a top priority SupporIng the supply process for local materials ConInual reinforcement thru site training Vavaú now has a set of installaIon skills transferrable to the next project
• Up-‐skilling the subcontractors business Very supporIve Much more skilled workforce Look to transfer process into the business wherever possible Leverage skill sets outside of just solar
• QA • Business process
How to build local skillsets that last