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VERGNET S.A. INTEGRATION OF A WIND FARM INTO THE UTILITY GRID

VERGNET S.A. INTEGRATION OF A WIND FARM INTO THE UTILITY GRID. Eric ANDRIEU, Electrical Design Department Manager Pierre PESNEL, Export Manager 18 – 20 October 2006. Thank you for welcoming us in Jamaica !. What will we talk about?. W ho is VERGNET today ? Our experience in the Caribbeans

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VERGNET S.A. INTEGRATION OF A WIND FARM INTO THE UTILITY GRID

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  1. VERGNET S.A. INTEGRATION OF A WIND FARM INTO THE UTILITY GRID Eric ANDRIEU, Electrical Design Department Manager Pierre PESNEL, Export Manager 18 – 20 October 2006

  2. Thank youfor welcoming usin Jamaica !

  3. What will we talk about? • Who is VERGNET today ? • Our experience in the Caribbeans • Grid connection & Protection planof wind farms • Scada System

  4. THE VERGNET GROUP • Created in 1989 • 100% private • 2 plants in France • More than 90% of turnover abroad • By history and culture, VERGNET’s focuses in cyclonic and isolated areas. • A new product range, the GEV MP (275 kW)

  5. Vergnet in the Caribbean Guadeloupe : • 17 people, dedicated to O&M • 10 wind farms / 5 locations • > 20 MW • 50 GWh / year Martinique • 4 wind turbines • 1,1 MW

  6. Vergnet in Guadeloupe • > 10 % of the island’s energy • Electric solutions with EDF • Maintenance « in the vicinity of the wind Farm »

  7. Vergnet in the Pacific • New Caledonia : • 15 people, dedicated to O&M • 7 wind farms / 4 locations • More than 25 MW installed power • 50 GWh / year produced • Fidji Islands : • 1 wind farm under construction • Commissionning: Q1/2007 • 37 WTG, 10 MW, very cyclonic area • In the Pacific : • New projects in progress

  8. The anti-cyclonic GEV MP – 275 kW Original technological solutions

  9. GEV MP A light original architecture • 55 m or 60 m hub height • 26 to 32 m Two-Blades rotors • Pitch regulated • Teetering Hub • Down Wind • Guyed Tilting Tower • Very small foundations: • 15m3 concrete • anchored on micro-piles • Asynchronous generator, 2 speeds • Flexible, then earthquake resistant

  10. VERGNET GEV MPAdaptation to Island’s contexts

  11. Hurricane protection • The WTG can be tilted down into protection position. • Same position is used for assembly and maintenance.

  12. Landscape integration

  13. Adapted Logistics • The GEV MP is lighter than other turbines of the same size • All parts fit in 20’ and 40’ containers • Installed with usual trucks and 25 tons cranes • Nacelle with blades: 8.7 tons Tower : 12 tons

  14. Very light Civil Work • Per Wind Turbine : • 9 drillings, 6’’ diameter, for the anchorages • Approx 15 m3 concrete

  15. Easy maintenance • Maintenance performed from the ground • Blade cleaning in the ground at each maintenance • No need for a special crane to change heavy components

  16. Simple electrical works • Each WTG features a shelter, for • WTG control • LV/MV transformer • Cos Phi control • MV cables in trenches link the WTGs to the dist. substation • An optic fibber links all WTGs to the control room and the Scada

  17. Grid Connection & Protection plan

  18. Respect the power quality of the grid - Respect the grid protection plan- Allow control and clear monitoring What is an efficient grid connection ? Grid Integration Analysis - To assess the impact of connecting the wind farm to the grid - To define the setting of the MV protection at the PCC

  19. R = minimum network short-circuit resistance at the PCC - X = minimum short-circuit reactance at the PCC- Max permitted voltage fluctuation in steady state and switching operation- Max permitted frequency fluctuation- Max permitted flicker type 1 & 2 Preliminary datas • From Utility • From Turbine Manufacturer : DEWI report (Compliance with the IEC 61 400-21) Flicker, Active and Reactive Power, Harmonics, etc…

  20. Step 1Check connection possibility at chosen location - Impact on grid Steady state voltage fluctuation - MV : +/- 7% - LV : + 6% / - 10% - Load flow analysisMax admitted current in the existing gridFrom those data, EDF : - Request grid adaptation - Gives budget offer

  21. Step 2Detailed analysis- Transient Voltage FluctuationDrop voltage caused by the transformer connectionWhen the Wind farm produces P 0,2 and Q 0,2- Flicker in continuous operation (type 1) and switching operation (type 2) - Type 1: Pst = Plt = c(fi,v) x Sn/Scc - Type 2: Pst = f (N10, Kf, Sn, Scc) Plt = g (N120, Kf, Sn, Scc)

  22. General electrical protection of the Wind farm Electrical fault in the wind farm Step 2Protection plan Wind farm protection Isetting < 0,8 I_earth _fault (safety condition)Isetting > 5 to 8 Ib (to avoid untimely tripping)Isetting >1,3 Im (to avoid untimely tripping) Isetting >1,2 I_short_circuit_tri_wtg(to avoid untimely tripping)

  23. General electrical protection of the Wind farm Electrical fault on the public grid Step 2Protection plan Grid protection - To avoid islanding network (Umax-min, Fmax-min, Vo)- To avoid wind farm production in case of grid fault - via Vo for earth fault - via Umin for short circuit

  24. Electrical DESIGN The conclusions of the grid integration analysis allow us to design the electrical part of the Wind farm : • MV substation • WTG parameters (PLC) • SCADA system

  25. MV SUBSTATIONsequential connection to avoid drop voltage

  26. WTG parameters (PLC) Programming of the PLC to reduce type 2 flicker : Pst = f (N10, Kf, Sn, Scc) Plt = f (N120, Kf, Sn, Scc) Parameters set according to EDF requirements.

  27. SCADA Supervisory Control And Data Acquisition • Adjustment of U max, P max, Q max at PCC to meet EDF requirements.

  28. Communication Remote access SCADA Via the public phone line. The communication is based on remote access (Windows access Virtual Private Network) . The communication had been optimized to reduce the volume of data (25 kbyte/s is required) Dispatch permanent communication Via permanent radio communication or equivalent. Full duplex transmission of key data (metering – setting) : -P, Q, U, CB position

  29. Some SCADA screen shots

  30. Park overview

  31. Substation overview

  32. Monitor (on line data of each GEV MP)

  33. Metering GEV MP

  34. Average power and wind speed report.

  35. Daily energy report

  36. Questions?

  37. Thank you for your attention

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