Grid Interconnection – Wind Turbine Penetration into KESCRequirements, Issues and Solutions

ABDUL HASEEB SIDDIQI EE-14

Profile-Abdul Haseeb• Graduation- Electrical 2008

• Electrical Engineer-Ipek Energi-2009

• Junior Design Engineer- S Mehboob 2009

• Assistant Manager-Grid Maintenance-KESC 2012

• Senior Project Engineer-Schneider Electric-XXXX

hasboo86@gmail.com

Alta Wind Energy Center, California Largest Wint Farm 1320MWEnercon-E126-7.5MW, Largest Wind turbine

PAKISTANI MARKET

Two projects out of 50-60GW potential; Zorlu Energi 56.4MW & Fauji Fertilizer Company Energy Limited 49.5MW - Jhampir, Sindh.

14.66cents/KWhr || to 2-3 cents/KWhr generation costs.

Minimum wind velocity (cutin speed) of 3-5 m/s Nameplate capacity at 12-14 m/s. Exceeding 25 m/s (cut-off speed) the turbine is blocked

1. Blade 2. blade support 3. Pitch angle actuator 4. hub 5. spinner6. main support 7. main shaft 8. aircraft warning lights 9. gearbox10. mechanical brakes 11. hydraulic cooling devices 12. generator13. power converter 14. Anemometers 15. transformer 16. frame of the nacelle 17. supporting tower 18. yaw driving device

• Number of blades (commonly two or three)

• Rotor orientation (upwind or downwind of tower)

• Blade material, construction method, and profile

• Hub design: rigid, teetering or hinged

• Power control via aerodynamic control (stall control) or variable-pitch blades (pitch control);

• Fixed or variable rotor speed

• Orientation by self-aligning action (free yaw) or direct control (active yaw)

• Synchronous or asynchronous generator (with squirrel-cage rotor or wound rotor -Doubly Fed Induction Generator (DFIG) with gearbox or direct drive generator.

DESIGN CONSIDERATIONS

INSTALLATION OPTIONS

• OFF SHORE - Sea bed for up to 40 m from sea floor while for 50m floating turbines are used.

• ON SHORE -

Country Name of Company Market share Delivery 2011 in MW Totally installed power in GW

Denmark Vestas 12.7% 5,217 50

China Sinovel 9.0% 3,700 13 [3]

China Goldwind 8.7% [4]

Spain Gamesa 8.0% 3,308 24

Germany Enercon 7.8% 3,203 24

United States GE Energy 7.7% 3,170

India Suzlon Group 7.6% 3,116 20

China Guodian United Power

7.4% 3,042

Germany Siemens Wind Power 6.3% 2,591 6.7

China Ming Yang 3.6% 1,500

WIND TURBINE MANUFACTURERS

INTERCONNECTION ISSUES AND REQUIREMENTS•Limitation of the generated disturbance•Gradual insertion of the power to be injected into the network•Immunity from voltage reductions•Control of the active/Reactive power

WHEN TURBINE CAN BE DISCONNECTED

SOLUTIONS- ABB STATCOM

KESC INTERCONNECTION-DHABEJI GRID

Kesc Network

KESC NETWORK

LOAD ON DHABEJI-03-05-13

BOC Gharo Pakland Amreli Trafo 1 Trafo 20

20

40

60

80

100

120

140

160

180

200

3/5/2013 2/5/20132

Source : KESC

FUTURE ?????

THANK YOU