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Congestion Management on the Italian border for the year 2005
European Electricity Regulatory Mini-Forum on congestion management
Milan, 25th January 2005
- 2 -
2 NTC on the Northern Italian Border [MW] - year 2005
• NTC values assessed by a Technical Task Force (TTF) and approved by a Steering Committee composed by all the TSOs involved
• Definition of ‘balanced’ and ‘unbalanced’ NTC values
• Definition of a procedure to be applied in case of security problems and/or changes of NTC values
• Possibility to review NTC values during the year according to TTF analisys and operation results
(1) New S.Fiorano-Robbia line in operation
France Switzerland Austria Slovenia Total NTC
peak 2.650 3.850 220 430 7.150
off-peak 2.450 2.980 200 370 6.000
peak 2.400 3.120 200 330 6.050
off-peak 2.250 2.750 190 310 5.500
Winter
Summer
Period (1)
- 3 -
3 Congestion management on the Italian border - year 2005
NTC Capacity managed by GRTN:
Congestions on the Italian electrical border are solved in the day
ahead market: selling bids and bilateral transactions are referred to
the Italian virtual zones
NTC capacity assigned by neighbouring TSOs:
Assignees can offer in the day ahead market or schedule bilateral
transactions (North zone)
- 4 -
4 Congestion management on the Italian border - year 2005
NORTH ZONE
Implicit Auction
F VIRTUAL ZONE
Bids/Bilateral transactions
through capacity assigned by RTE
Implicit Auction
CH VIRTUAL ZONE
Bids/Bilateral transactions
through capacity assigned by CH
TSOS
Congestion problems on the Italian electrical
border are solved in the Day Ahead Market
through implicit auctions referred to each virtual
zone for the capacity managed by GRTN :
selling bids
bilateral transactions
X
Bilateral transactions
Pool transactions
Selling Bids
Virtual Zone
Pvirt z
€/MWh
MWh
(North-West border)
- 5 -
5 Congestion management on the Italian border - year 2005
Virtual zonePvirt
North zone
PN
PPUN
PPUN
PN
Pvirt
(PPUN – PN)Congestion
in Italy
(PN – Pvirt)Congestion
on the border
Value of CCC rights
Value of CCCI rights
Qi TL
X
Bilateral transactions
Pool transactions
Selling Bids
Virtual Zone
Pvirt
€/MWh
MWh
TL
Qi > TL
PPUN = Italian national price (Buy)
PN = North zone price
Pvirt = Virtual zone price
- 6 -
6
Day ahead market (MGP)
AdjustmentMarket (MA)
Dispatching services market (MSD)
Real time balancing session
System Marginal Price
System Marginal Price Pay as bid Pay as bid
10:30 AM 2:30 PM 9 PM 0:0 12 PM
Day (n-1) Day (n)
Reserve
Voltage adjustament
Intra-zone congestion management
Balancing
Unplanned adjustaments:
• Outages
• Real time countermeasures
Energy Energy Services Services
Only one set of offers (Buy/sell) used for both day ahead and real time sessions
Qualified power units only
GRTN as unique counterpart
MSD highlights
Balancing (real time market)