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Management of the Italian electric system Current status and challenges Luca D’Agnese GRTN CEO Beijing, 24-25 October 2005.

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Presentation on theme: "Management of the Italian electric system Current status and challenges Luca D’Agnese GRTN CEO Beijing, 24-25 October 2005."— Presentation transcript:

1 Management of the Italian electric system Current status and challenges Luca D’Agnese GRTN CEO Beijing, October 2005

2 2 Summary  POWER SYSTEM FEATURES AND DEVELOPMENTS  OPERATIONAL EXPERIENCE – NTC assessment – Integrated control and telecontrol system  CHALLENGES

3 3 Power System Features Peak Load Demand54 GW National Power Generation 84 GW(*) Imports7,2 GW Voltage levels of transmission grid kV Network configuration Mesh (EHV)– Radial (HV-MV) InterconnectionsAC – DC links SLOVENIA FRANCE AUSTRIA SWITZERLAND Market zones and Transmission constraints (Winter limits – peak hours) 0     (*) updated at the end of year 2004

4 ,2 54,4 60,1 1,3 (2%) ,1 CAGR*** +3,3% 6,6 (12%) 11 (20%) 11,1 (19%) 10,5 (19%) 69,4 Capacity vs. Load Demand Summer load demand GW Load Demand Available capacity Power plants changes* Import Internal generation Reserve margins (GW, % of load demand) *New power plants and changes due to conversion to combined cycle **Available capacity increase ***Compound Average Growth Rate 58,3 53,5 53,1 54,1 56,7

5 5 Transmission system critical areas 380 kV line overloads ALBERTVILLE VILLARODIN AIROLO SOAZZA DIVACCIA Slovenia DUGALE NOGAROLE ROCCA MALCONTENTA PIASTRA TRINO N. TURBIGO RONCOV. EDOLO S:FIORANO OSTIGLIA CAORSO ROSEN PORTO TOLLE PORTO CORSINI MONFALCONE PIOMBINO VILLAVALLE PRESENZANO ATI ISAB SARLUX BARGI Power Plants Electrical Station Electrical station under construction Single-circuit line Double-circuit line Line under construction North-East Milan Campania-Calabria Naples Lombardia Piem.-Valle d'Ao. Liguria Trentino’s path Puglia Others Overload* Area High-medium critical area *telemeasured on 380kV-220kV network 34,0% 13,8% 11,2% 8,7% 7,9% 5,9% 4,8% 7,5% 3,5% 2,8%

6 6 Grid Reinforcements New lines North– C.North Yearly time-period percentage of critical market separation C.North- C.South C.South- South South- Calabria Calabria- Sicily 49% 23% 14% 1% 5% C.North- Sardinia 31% * 380kV conversion Foggia - Benevento Udine Ovest - Okroglo Redipuglia - Udine Ovest Venezia N. - Cordignano Trino - Lacchiarella Fano-Abbadia Sardinia – Mainland Interconnection Chiaramonte - Ciminna Montecorvino - Benevento Sorgente - Rizziconi Colunga – Calenzano* Grid reinforcement to avoid market zone separations and inter-area congestions Other new line to improve security/quality of the grid and to increase the interconnection capacity

7 7 Summary  POWER SYSTEM FEATURES AND DEVELOPMENTS  OPERATIONAL EXPERIENCE – NTC assessment – Integrated control and telecontrol system  CHALLENGES

8 8 NTC assessment Changes & review of applied methodology IMPORT MW t Peak hoursOff-Peak hours Off-Peak hours IMPORT MW t Peak hoursOff-Peak hours Off-Peak hours IMPORT MW t Peak hoursOff-Peak hours Off-Peak hours Flat, 1 NTC value Off-peak hours/peak hours, 2 NTC values for modulation Balanced, 4 NTC values for modulation

9 9 Integrated Control and Telecontrol System PRESENT SYSTEM NEW SYSTEM NEW SYSTEM Fixed configuration Hierarchical Business continuity based on back-up Technology obsolescence Not linkable Flexible configuration Not hierarchical Business continuity based on other control centers New technology Easy integration with other systems Network visibility enlargement Advanced EMS functions New System Features:  3 Control centers  3-5 Telecont. Centers   250 RTU  Data acquisition: Central acquisition concentrators at Control centers (SIA-C) Regional acquisition concentrators (SIA-R)

10 10 Summary  POWER SYSTEM FEATURES AND DEVELOPMENTS  OPERATIONAL EXPERIENCE – NTC assessment – Integrated control and telecontrol system  CHALLENGES

11 11 Internal Generation Power plants rated power for different technologies and sources % of total installed capacity Thermal power plants Hydro power plants Wind power plants & Others 100% 52% 37% 40% 12% 23% % Steam turbine % Combined Cycle Combined cycled and coal power plants increase

12 12 (Values updated by the end of August 2005) SLOVENIA FRANCE SWITZERLAND AUSTRIA TOTAL (MW) Development of wind farms by the end of 2007, Scenario 2005 MW Wind Power plants increase Sardinia At the end of % of off-peak load demand Sicily At the end of % of off-peak load demand

13 13 Overview TSO Integration GRTN Terna + Network management Network ownership New investments choice of asset owner authorisation construction System planning Maintenance System Operation Direct assignment or bidding Pre-authorisation discussions Support discussions with local authorities Development plan Co-ordinated schedule of maintenance of grid and other transmission facilities Plant dispatching Grid supervision/reconfiguration Development Authorisation application Work execution Financial plan Proposals for grid maintenance works Work execution Physical operation of grid


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