Management
of the Italian electric system
Current status and challenges
Luca D’Agnese
GRTN CEO
Beijing, 24-25 October 2005
Summary

POWER SYSTEM FEATURES AND DEVELOPMENTS

OPERATIONAL EXPERIENCE
–
–

NTC assessment
Integrated control and telecontrol system
CHALLENGES
2
Power System Features
Peak Load Demand
54 GW
SWITZERLAND
220
3850
AUSTRIA
National Power
Generation
84 GW(*)
Imports
7,2 GW
Voltage levels of
transmission grid
380-220150-132
kV
Network
configuration
Interconnections
(*) updated at the end of year 2004
Mesh
(EHV)–
Radial
(HV-MV)
AC – DC
links
FRANCE
2650
SLOVENIA
36001700
430
500
Market zones and
Transmission
constraints
(Winter limits –
peak hours)
3
Capacity vs. Load Demand
Summer load demand 2003-2007
GW
Load Demand
Available capacity
CAGR***
+3,3%
65,1
54,4
60,1
7,2
4,6
2,4
5,5
7,2
4,5
7,2
Import
6,7
Power
plants
changes*
56,7
54,1
53,5
53,1
69,4
67,2
58,3
55,5
55,5
55,5
55,5
2003
2004
2005
2006
2007
1,3 (2%)
6,6 (12%)
11 (20%)
10,5 (19%)
11,1 (19%)
48,9
Reserve margins
(GW, % of load
demand)
* New power plants and changes due to conversion to combined cycle
** Available capacity increase
*** Compound Average Growth Rate
Internal
generation
4
Transmission system critical areas
380 kV line overloads
Austria
High-medium critical area
Switzerland
SOAZZA
AIROLO
ALBERTVILLE
France
Area
VILLARODIN
Others
Puglia
Trentino’s path
Liguria
Piem.-Valle d'Ao.
Lombardia
Naples
7,5%
Campania-Calabria
11,2%
4,8%
5,9%
7,9%
CORDIGNANO
REDIPUGLIA
DIVACCIA
MONFALCONE
VEDELAGO
SANDRIGO
SALGAREDA
PLANAIS
VENEZIA
N.
RFX
NOGAROLE
MALCONTENTA
ROCCA
DOLO
DUGALECAMIN
TURBIGO
LEINI’
TRINO N.
RONDISSONE
VENAUS
OSTIGLIA
ACC.
PIOSSASCO
FERRERO
CASTELNUOVOLA CASELLA CAORSO
FERRARA
CASANOVA
CARPI
VIGNOLE
PARMA
S.DAMASO
RUBIERA
MARTIGNONECOLUNGA
MAGLIANO
2,8%
3,5%
VADO
LIGURE
PIASTRA
ADRIA
PORTO TOLLE
PORTO CORSINI
RAVENNA. C
FORLI’
LA SPEZIA
BARGI
S.MARTINO
MARGINONE CALENZANO
POGGIO A CAIANO
LIVORNO
ACCIA
IOLO
ROSEN
PIOMBINO
FANO
TAVARNUZZE
CANDIA
PIAN DELLA
SPERANZA
SUVERETO
ROSARA
VILLAVALLE
8,7%
TERAMO
S.GIACOMO
VILLANOVA
MONTALTO
TORVALDALIGA
. N
TORVALDALIGA S.
ROMA
ROMA S.
Milan
Slovenia
UDINE
OVEST
EDOLO
S:FIORANO
RONCOV.
FOGGIA
GARIGLIANO S.MARIA
C.V.
FIUME SANTO
CODRONGIANOS
ANDRIA
PRESENZANO
LATINA
13,8%
LARINO
VALMONTONE
CEPRANO
PATRIA
BARI OVEST
BENEVENTO
S.SOFIA
BRINDISI
STRIANOMONTECORVINO
MATERA
TARANTO N.
GALATINA
North-East
34,0%
LAINO
Linea a 400
kVc.c.
ROSSANO
Greece
VILLASOR
ATI
PORTOSCUSO
SELARGIUS
RUMIANCA
SCANDALE
FEROLETO
CAGLIARI SUD
SARLUX
Overload*
Power Plants
Electrical Station
Electrical station under construction
Single-circuit line
Double-circuit line
Line under construction
RIZZICONI
SORGENTE
PATERNO’
CHIAROMONTE G.
ISAB
*telemeasured on 380kV-220kV network
5
Grid Reinforcements
New lines 2006-2010
Udine Ovest Okroglo
Trino - Lacchiarella
Yearly time-period percentage
of critical market separation
Redipuglia - Udine
Ovest
Venezia N. - Cordignano
Fano-Abbadia
Colunga – Calenzano*
Sardinia – Mainland
Interconnection
North–
C.North
23%
C.NorthC.South
Foggia Benevento
C.South1%
South
SouthCalabria
Montecorvino Benevento
14%
5%
CalabriaSicily
C.NorthSardinia
Chiaramonte Ciminna
49%
31%
Sorgente - Rizziconi
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
6
* 380kV conversion
Summary

POWER SYSTEM FEATURES AND DEVELOPMENTS

OPERATIONAL EXPERIENCE
–
–

NTC assessment
Integrated control and telecontrol system
CHALLENGES
7
NTC assessment
Changes & review of applied methodology
2003
Flat,
1 NTC value
MW
IMPORT
Off-Peak Peak hours Off-Peak t
hours
hours
2004
2005
Off-peak hours/peak hours,
2 NTC values for
modulation
MW
IMPORT
Off-Peak Peak hours Off-Peak t
hours
hours
Balanced,
4 NTC values for
modulation
MW
IMPORT
Off-Peak Peak hours Off-Peak t
hours
hours
8
Integrated Control and Telecontrol System
PRESENT
SYSTEM
NEW
SYSTEM
• Fixed configuration
• Flexible configuration
• Hierarchical
• Not hierarchical
• Business continuity based • Business continuity based
on back-up
on other control centers
• Technology obsolescence • New technology
• Not linkable
• 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)
9
Summary

POWER SYSTEM FEATURES AND DEVELOPMENTS

OPERATIONAL EXPERIENCE
–
–

NTC assessment
Integrated control and telecontrol system
CHALLENGES
10
Internal Generation
Power plants rated power for different technologies and sources
% of total installed capacity
100%
100%
100%
1%
1%
3%
26%
25%
22%
73%
74%
75%
2001
2005
2007
% Steam
turbine
52%
37%
40%
% Combined
Cycle
12%
23%
23%
Wind power
plants & Others
Hydro power
plants
Thermal power
plants
Combined
cycled and
coal power
plants
increase
11
Wind Power plants increase
Development of wind farms by the end of 2007, Scenario 2005
MW
SWITZERLAND
3000
2356
2500
MW
2000
1000
2496
SLOVENIA
FRANCE
1603
1500
AUSTRIA
11
TOTAL
1132
664
780
(MW)
874
1.603
500
194
0
2001 2002 2003 2004 2005 2006 2007
Sardinia
At the end of
2007 43% of
off-peak load
demand
344
755
Sicily
At the end of
2007 38% of
off-peak load
demand
299
(Values updated by the end of August 2005)
12
TSO Integration
Overview
• Development plan
System planning
• Financial plan
• Direct assignment or bidding
New investments
GRTN
Network
management
• choice of asset
owner
• authorisation
• construction
• Pre-authorisation discussions
• Support discussions with local authorities
• Development
• Authorisation application
+
• Work execution
Terna
Network
ownership
System
Operation
• Plant dispatching
• Grid supervision/reconfiguration
• Physical operation of grid
Maintenance
• Co-ordinated schedule of maintenance of
grid and other transmission facilities
• Proposals for grid
maintenance works
• Work execution
13