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Project: Galapagos Wind + Dieseldescription
3 x Gamesa’s Made AE59-
800kW
integrated to an existing
system
3 diesel gensets each aprx
600kW
2,4MW wind / 1.8 MW diesel
Commissioned october 2007
Scope for Gamesa: WTG installation, Diesel Integration , Grid/generation Control, Communications, Scada
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Project: Galapagos Wind + DieselachievementsVery low winds (ecuator)
penetration levels :
» annual 31%, monthly up to
60% , peak up to 80%
92% availability,22GWh in 7
years
small, remote wind farm
operated by Customer after
warranty period
Full wind power Restrictions on : • minimum loads for diesel (20%) and • Reactive power demand on the
system
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NEW EQUIPMENT: Scope Gamesa Offgrid
Existing SystemDiesel + Consumer
CONSUMER
eg. Mining/ Residential
Gen set (diesel)
SOLAR PV PANELS
Inverter PV
WIND
STATCOM / ULTRACAPS / FLYWHEEL
GRID INTEGRATION EQUIPMENT
OPTIONAL STORAGE
(eg Battery)
Inverter
BATTERY
CONTROL DE
MICRORED
Wind/PV/Diesel/ Battery
Grid Control is key to integrate Maximum amount of RenewableEnergy into the System
External equipment, Specified & purchased by Gamesa
Internal equipment Designed & Manufactured by Gamesa
SOLAR PV
GRID CONTROL
Inverter
System Components : Generic Offgrid Project
+ PV Forecast
+ Wind Forecast
Galapagos Project Scope of Supply
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Our lessons learned proposed best practice
Plant Design is Key for success – Do incremental
Steps
Involve technology supplier …Early
Start Measuring Wind …Early
Allow Curtailable Loads
Forecast (Wind+PV) is essential tool
Single contract . Ensure coordination, avoid
interfaces
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Plant design is key for successDo incremental Steps
Step1- Energy analysis (1h /10min data)
» Scenarios installed RE (Wind / PV) power –
penetration, energy curtailed,
» Obtain initial Cost of Electricity, &
dimensioning
Step2- Grid Stability – Dynamic Analysis
» Grid integration equipment (freq/volt
regulation)
» Validate whole system electrical model
» Events & faults simulation
- €
50 €
100 €
150 €
200 €
250 €
0 5 10 15 20 25 30 35
CoE
(EU
R/M
Wh)
Potencia Eolica Instalada, MW
CoE Sistema Eolico+Diesel, en funcion de MW eolicos instalados
CoE2 = diesel siempre encendidoCoE3 = operacion con parada diesel
CoE2
CoE3
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Involve technology supplier(s) …early
Often too stiff specifications
expensive to comply
» Example: overspecification in Project X,
requires full diesel storage battery backup (
in case of one windturbine shutdown) for
residential loads
» result: unnecesary high Cost Electricity
» final result: tender declared void
» 15 months and money wasted
CLIENT/OFFTAKER
CONSULTANTTECHNOLOGY SUPPLIER
Consultant and Technology Suppliers
iterations save $$$ and time
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Start measuring Wind …early
Satellite wind data
»good for patterns (day, season)
»but not enough for absolute
values
Wind measurements required
»Min 12 months - for seasonal
pattern bankabilityStart early, even at lower heights. Later it is possible correlation at exact sites and exact hub height
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Allow curtailable loads
Curtailable loads help increase penetration
of renewables, increase grid stability
desalination, ice making
Convert loads to non-critical
»E.g. curtailable residential at discounted elec
prices
curtailable loads/short term use for grid
balancingCurtailable loads have similar effect as storage, at much cheaper cost
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Forecast (Wind / PV) is essential tool
Real time FORECAST is essential at
OPERATION to minimize diesel genset
starts/stops
Week ahead distribution Error
0
10
20
30
40
50
60
day 1 day 2 day 3 day 4 day 5 day 6 day 7
PV forecast avoid
problems with cloud
passage
Wind forecast
higher average
variability but smaller
sudden power drops
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Single contractor Ensure coordination, avoid interfacesConstruction&Operation coordination of
several technologies: Diesel / Wind / PV /
Storage/Statcoms
Avoidance several contractors
fingerpointing on each contractor’s
interfases
Wind
Solar pv
Grid Controller
Diesel integrat
Grid Stability, Statcoms
Client / Offtaker
Best result if single EPC
Contractor is technology
supplier of several sub-systems
EPC Contractor / Technology
Supplier
EPC Engineering, Procurement, Construction
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Additionally, Technology Supplier
on:
Solar PV Inverters
Inverters for Grid Integration
Grid Controller & Diesel
Integration
EPC Contractor for Offgrid
GENERAL PRESENTATION
1 Gamesa value chain in Offgridtotal Value Chain in WIND, PLUS…
7 GW 31.9 GW 21.2 GW
WIND FARM DEVELOPMENT
WIND TURBINE MANUFACTURIN
G
WIND TURBINE SERVICES
10 GW
EPC