Project case study st. eustatius pv hybrid system (cuvalay)

Kickoff Projekt „Cobija, BO“
CARIBBEAN LARGEST PV-DIESEL HYBRID
AND ENERGY STORAGE SYSTEM
ST EUSTATIUS (PHASE I)
Eng. Fred Cuvalay CREF. Miami, USA Oct. 2016

Agenda
2
I.
II.
The Challenge and Options
The Preparation and decision
III. Execution
IV. Monitoring and Performance
V. The future

STUCO perspective
> Electric Power supply in St. Eustatius (Statia) is provided by STUCO, owned 100%
by the Government of Statia and independently managed by a Managing Director
under supervision of a Board of Commissioners
> Up to 2015, 100% depending on fossil fuel. (5.3 MVA diesel gensets capacity)
> More than 75% STUCO income was going for operational cost
> 2015 Statia’s grid key facts:
• 1.6MW average demand
• 2.3MW peak demand
• 13.6GWh Energy demand
• 3.6M diesel liters consum.
3
Something needed to be done. Government?
I. The Challenge and Options

Dutch government Starting position
> The Netherlands Antilles split up in 2010
> Up to 2010 St Maarten subsidized electricity
on St. Eustatius and Saba
> St. Eustatius and Saba split from the much
larger St. Maarten electricity company
> Without subsidy, electricity prices would rise
unacceptably on St. Eustatius and Saba.
> Dutch government promised support:
• Financially healthy electricity companies
on St. Eustatius and Saba
• Consumer rates not higher than before
split
4
This meant diesel costs shall decrease.

Dutch government Vision
> Task: Decrease operational costs for
power production derived from high
diesel costs
> Standing policy: No subsidy for fossil
fuel
> Solution: Subsidy for investment in
durable clean energy (no CO2
emissions)
> Durable options initially approached
were wind and solar
5
But, is it a business case?
Time
Electricity
Cost
Today
Source: SMA Solar Technology

Dutch Government, Driver for change
> The drivers for the Dutch government are political/social: new organisation of the
Kingdom and electricity rates for Dutch citizens in St. Eustatius and Saba
> Still, there is a business case
• At 2014 oil prices, the solar farm and battery system earns it self back in approx.
6 years
• At 2016 oil prices, the system earns it self back in approx. 11 years, while
warranty on performance is much longer for most parts of the solar farm
• At 2018 oil prices, …… ? We don’t know. But we are safe if oil prices rise
> In other words:
• Use low oil costs to finance durable investments NOW
• Think who will be smiling last when oil price go up
6
How to decide better durable clean energy to decrease operational costs in Statia ?

Agenda
7
I.
II.
III. Execution
V. The future

Preparing tender for solar project
> After considering wind at first, solar was chosen due to the following reasons:
8
RFP?
II. The Preparation and decision
> Wind:
• High risk for hurricane as located
Hurricane belt
• Assessment and project execution
larger in general compared to solar
• Market research showed few cases
or difficulty to control at high
penetration
• Grid connection costly/distance and
transport to site poses
> Solar:
• Costs going down more drastically in
the last years
• Modular expansion possible,
possibility to add more PV and
Energy Storage per phases
• Grid connection of PV array location
less costly/closer to existing grid
• Low maintenance as compared to
running diesel engines

Preparing RFP for solar project
> Feasibility study engaged May 2014
• Size of the park 2 MWp Solar Park with minimum energy yield 3.2GWh first year
• Solar penetration larger than 50%, therefore Energy Storage to provide grid
stability and load shifting needed
• Technical capability of the industry to deliver
• Financial justification
> RFP final March 2015
• Consultants: Oxperts
• Requirements, net energy supply to the grid
• Minimum requirements for panels, batteries and inverters
• Delivery time
• Completeness of proposal
9
Decision? Who?

Selecting the right proposal
> Criteria for selecting best proposal
• Compliance with the tender procedure; functional and technical requirements
• Investment cost ($/kWh output)
• Experience of the bidder
• Design and landscaping
• Proposal quality and soundness
> Consortium awarded  Sunshine Real State NV / EcoEnergy NV / SMA Sunbelt
GmbH
• Consortium with local and international experience. More than 80 hybrid projects
worldwide (SMA Fuel Save Controller) and Energy Storage Solution
• Proven components and support from manufacturers SMA / Schletter /
Suntech.
• Comprehensive proposal, clear sizing and yield projection
10
How to move forward to Execution

Agenda
11
I.
II.
III. Execution
V. The future

Steps coordination
> EPC contract mid July 2015
> Payments must take place per
schedule
> Support coordination of receipt of
materials
> Support Immigration process for
specialist workforce
> Support for electricity and internet
during construction
> Logistical support for reference to
local services
> Construction began in October 2015,
commissioned March 2016
12
Final System to be procured
III. Execution

Final System procured
13
SMA system solutions for hybrid applications
SMA System Technology
• SMA Fuel Save Solution incorporates the
SMA Fuel Save Controller
• 72 SMA Sunny TriPower 25000-TL-30
• 1 SMA Sunny Central Storage SCS 1000
Plant information
• Installed PV power: 1,9 MWp
• Installed battery power: 1 MW/580 kWh
• Annual yield: 3,2 GWh
• Diesel generator rating: 4 MVA
• Annual Savings expected:1,900,000
Project
• Location: St. Eustatius, NL
Antilles
• Commissioning: March 2016
The island of St. Eustatius, located in the
caribbean is fully powered by diesel
generator. By integrating 1,9 MWp of PV
power and 1 MW of batteries with SMA’s fuel
save controller, the island is able to reduce
its fossile fuel consumption by almost 30%.
Currently PV+battery penetration as high as
88% has been observed
An expansion of the existing system is
already planed and shall be installed in 2017.
Source: SMA project example
III. Execution

Some challenges
> Logistics and planning
> Logistics and heavy equipment
> Purchasing Local materials
> Accommodation
> Work permits for EPC
> Long communication line from PV array
to SMA FSC at Gensets Powerhouse
14
System performance up to now?
III. Execution

Agenda
15
I.
II.
III. Execution
V. The future

Monitoring with SMA Fuel Save Controller
16
Battery Monitoring?

Monitoring with SMA Fuel Save Controller
17
KPI’s?

KPIs up to August
18
How it looks, a typical day performance?
Fuel Savings (liters)
Target_annual 840,000
6 Avg_annual projection 906,684
66,684
About 10% above target

Shiny day
> Beautiful but rare!
19
Typical day?

Typical day
> Battery at work!
20
What about the future?
Energy Shifting:
discharge at end of day
When PV at Max PV, gensets o to min.
nominal genset load
Battery compenssates PV fluctuation

Frequency stability. Battery delivers or absorbs power.
21
Though solar power with large penetration fluctuates, the grid frequency is stable

Agenda
22
I.
II.
III. Execution
V. The future

Phase II (OVERVIEW)
> Additional
• 2.25 MWp PV  Grid Forming SMA PV Inverter
• 5.1 MWh Battery Storage
• Expected Renewable system share 40-46%
> Expected Diesel off-mode time (Black reflects 0 kW gensets load work)
23
Area required? Impact?
V. The Future

Solar and agriculture coexistence on same area
24
V. The Future
Bright and fossil fuel independent future for Statia!

25
Thank you for your attention!
Jesus A. Martinez-Cantu
Jesus.Martinez@sma-america.com
Tel: +1 916 316 7234
Fred Cuvalay
cuvalay.fred@stucoeux.com
Tel: +599 318 1393
Eelco Baak
eelco@ecoenergycuracao.net
Tel +5999 684 5452

Project case study st. eustatius pv hybrid system (cuvalay)

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Project case study st. eustatius pv hybrid system (cuvalay)