1. RENEWABLE ENERGY INTEGRATION IN OFF-GRID APPLICATIONS:
Placing the grid stability at the heart of hybrid systems
Asia Clean Energy Forum 2015
Manila
15-19 June 2015

2. Vergnet Hybrid systems : solutions based on field experience
25 YEARS’ experience on REMOTE and INSULAR areas
1992: first hybrid system
40 WIND & PV plants installed on islands worldwide
5 continents - 35 countries
4 subsidiaries of maintenance and local partners
Subsidiaries
RE plants

3. RELIABLE RENEWABLES FOR ISLANDS GRIDS & REMOTE INDUSTRIES
Hybrid ?
What is really at stake : grid stability
One step beyond: Hybrid Wizard ©
Case study 1: Hybrid PV for remote island
Case Study 2: Wind –diesel for mining company
Case Study 3: High Penetration Wind-Battery system for island
What decision makers should look at?

4. 200 T of diesel fuel saved / year
Why HYBRID?
1 GEV MP-C Wind Turbine =
200 T of diesel fuel saved / year
100kWp = 47 T of diesel fuel saved/year

5. Choosing the right technology for the site
Choosing the right technology for the site (resource, loads, weather, land, etc.)

6. Optimizing the design for the best ROI (Homer, Copex, etc.)
System design
Diesel + PV
Diesel + Pv +Wind
+500kW/560kWh
+1MW/1MWh
€/l Diesel fuel
0.7
1.0
1.34
Capex
COE (Cost of
Electricity) in €/kWh
0.24
0.34
0.45
0.21
0.26
0.31
0.17
0.20
0.23
Renewables share
8.2%
54%
77%

7. Hybrid systems, what is at stake: Intermittent energy, Variable load
Efficient Hybrid control is the key

8. INTEGRITY / SERVICE CONTINUITY
Renewables Integration Issues
Example : FREQUENCY (transient) G G G G G
Network analyzer G f t
limit
No renewables:
Working on Diesel Generator.
No particular issues detected. (Stable production)
50 Hz
With Hybrid Wizard:
At first the grid is stable.
With Hybrid Wizard:
Hybrid Wizard detects a risk of instability (resilience of the grid too low) and decides to add a Genset for spinning reserve or limit renewable power.
Consequences: unwanted tripping leads to blackout of the grid.
Without hybrid controller:
At first the grid is stable.
With Hybrid Wizard:
Thanks to additional genset, the frequency drop does not overpass the limit.
With Hybrid Wizard:
Blackout has been avoided.
Without hybrid controller:
The genset power increase speed is not high enough, no quick order to start additional genset,. Frequency drops and protection trips, disconnecting the genset and leading to a blackout.
Without hybrid controller:
The line of the PV plant is struck by lightning. It leads to a drop in produced power, thus a frequency drop.
INTEGRITY / SERVICE CONTINUITY

9. Hybrid system What is at stake?
Whatever the choice and complexity of the technology (PV, wind, PV+wind, PV+wind+storage, etc.)
Whatever the size of the project
Whatever renewables penetration target rate
Grid stability must drive the design and the operation of the hybrid system during life cycle

10. One step beyond : Hybrid Wizard ©
All measured values are transmitted to Hybrid Wizard ©
One or several power analyzers are distributed on the grid
Hybrid Wizard © calculates in real-time new power instructions
Most of the time, network analyzers are linked with an optical network
Power instructions
Samoa
550 kW wind farm (running)
Kiribati
500 kWp PV plant (building)
Mauritania
4.4 MW wind farm
(running)
1.3 MWp PV plant
(building)
PV + inverter
Voltage
Frequency
Current
Flickers coef.
Harmonics (%)
Grid resilience
Power instructions
SCADA
Network analyzer
Gensets
Grid
Optical fiber
Wind turbines + PLC
LOADS

11. Case Study 1: Wind diesel system for Mining company
Location
Mauritania
Technology
Hybrid wizard controler, no storage
Installed Capacity
Wind: 4400kW
Diesel: 4 x 4000 kW
Peak load kW

12. Case Study 1: Actual average penetration of Renewables since June 2013
AVERAGE WIND SHARE: %
FUEL CONSUMPTION: %
DIESEL SAVINGS: T /year
= 1 TURBINE PAID FOR
EVERY 3 MONTHS

13. Case study 2: Hybrid PV system for remote island
Location
Kiribati
Hybrid Technology
Hybrid Wizard controler
Installed Capacity
PV: 1.3MWp ( kWp)
Diesel: 5.45MW
Peak load
3500 kW (Week)

14. OVERCAPACITY OF PV PRODUCTION
Case study 2: Hybrid PV system for remote island
POSSIBLE
OVERCAPACITY OF PV PRODUCTION
DURING WEEK-END
Genset minimum setpoint: 30%
Hybrid Wizard:
Real time management of PV and Diesel power plants
Fuel savings: 596 T / year

15. Case study 3: High penetration Wind-Diesel system for island
Location
Caribbean Island
Hybrid Technology
Hybrid Wizard controler
Installed Capacity
Wind: 1.925MW
PV: 114kW
Diesel: 1.9 MW
Battery for spinning reserve
Peak load
1.3 MW

16. Case study 3: High penetration Wind-diesel system for island
Option 1: Hybrid Wizard without Battery storage
Option 2: Hybrid Wizard + Battery storage for spinning reserve
1.37MW NO
40%
70%
100%
1 039 m3/year
WIND POWER
BATTERY
AVERAGE RE SHARE
PEAK RE SHARE
RE USAGE
DIESEL SAVINGS
1.92 MW
YES
70%
90%
100%
1 418 m3/year
Wind
Genset PV
Wind
Genset PV

17. What should Decision Makers look at for a successful off-grid projects implementation?
Always keep grid stability as the driver for the system requirements
Consumption: minimum and maximum loads, grid parameters
Possibility of performing grid measurements, identify weak points, etc.
Technology choice must be the result of the feasibility, not an a priori choice
Renewable resource assessment
Technology choice fit to the local situation (high perfo batteries in remote and sandy areas?)
Set reasonable targets for penetration rates and have a step by step approach
Grid stability: the project must be immediately a success
Possibility to improve the system and targets : technology is evolving fast
Project a flexible system, able to adapt to the grid evolutions
Possible evolutions of the consumption
Integration in the plans for development of the infrastructures of the territory
Take Operation & Maintenance into account from the very beginning of the project
Technological choices and targets must fit to the local capability and infrastructures
If knowhow is not already present, include a capability building program

18. Thank you Technology is ready
Significant savings with high quality & reliability
Short payback time if good resource
Thank you
Istvan Ponsot –