The Feasibility of Synchronous Interconnection
between IPS/UPS and UCTE
Matthias Luther
Regional Electricity System and Market towards the Internal Electricity Market (RESYM)
Bucharest, 26 October 2007
Supported by:
union for the co-ordination of transmission of electricity

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
UCTE-IPS/UPS Study – three major questions to answer
Considering technical, organisational and legal issues the study has to answer the
following questions:
Is a synchronous coupling of IPS/UPS with UCTE feasible?
What are the mandatory measures and requirements on both sides?
What are the associated costs?
Additionally, market aspects and environmental issues are building the
conditional framework.
First priority: maintaining the present performance of the systems with respect to
system security and reliability.
page 2 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Facts and framework of the project
The three years investigation is a joint project under the responsibility of UCTE
The project focus on a synchronous coupling of IPS/UPS and UCTE
Additionally, the consideration of non-synchronous link projects is foreseen
Budget: approximately 10 million €
Nearly 100 experts from both sides involved
No example in the world of a synchronous transmission system
- with 900 GW installed generation capacity
- serving 700 million customers
- in 10 time zones
page 3 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
System integration vs. System coupling
IPS/UPS
UCTE
System coupling:
System A System B rules
rules
rules rules
Allocation of corresponding and
Coupling
further mandatory Integration
• technical
• organisational IPS/UPS
UCTE
rules
rules
• legal
System A
rules System B
measures and rules on both sides.
Mandatory
interconnection
rules
page 4 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
UCTE-IPS/UPS study – common project organisation
Project Representative
Board (PRB)
PM / PM UCTE
PM IPS/UPS
Project Management
Board (PMB)
WG 1: WG 2: WG 3: WG 4: WG 5:
Steady State System Power Operation and Legal
Analysis Dynamics System Organization Aspects
Control
Technical Aspects
page 5 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Initial time schedule and project phases
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2004 2005 2006 2007 2008
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phase 1 phase 2 phase 3
pre- final
Model Verification Assessment
phase phase
Preparation and Simulation and Results
• further analyses • final report
• ToR • Project kick-off • verification of
• evaluation of • final accounting
• TEN-E • survey of IPS/UPS models
results • end of project
Application system • power system
• identification of
• Set up of • installation of simulations
measures and their
consortia measurement • sensitivity
costs
• Cooperation devices analyses
• presentation of
Agreement • power system
results
measurements
• preparation of draft
• data collection
of final report
• preparation of
models
page 6 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Summary of Analysis Program
Steady State Analysis
Load flow simulation of nominal and emergency conditions
Estimation of interface transmission capacity
Identification of most probable load flow scenarios
System Dynamics
Transient and small signal stability analysis
Impact of IPS/UPS Emergency Control Automatics
Power System Control
Power / frequency control
Voltage / reactive power control
Analysis of defense, disconnection and restoration plans
Operation and Organization
Analysis of operational practice
Guidelines for interface procedures
Coordination of operation (i. e. data exchange, congestion management, etc.)
Legal Aspects
Analysis of legal frameworks
Legal case studies
Identification of legal requirements for synchronous operation
page 7 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Merged UCTE-IPS/UPS load flow study model
Load flow model includes representation for the planning horizon 2008 of
HV and UHV network (220 kV and above)
Important transmission lines of lower voltages (inter-system transmission lines, generator
lines of large power stations)
Significant power stations in the interface area
Volume of load flow model
3,910 nodes
9,730 ties (lines and transformers)
770 generator nodes
Total load (winter peak load 10 GMT): 530 GW
page 8 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Transfer scenarios for load flow analysis
France
page 9 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Wide Area Measuring System (WAMS)
in UCTE 31 Portile de
22 23 Fier
24
20
measuring devices: ) )
(
) 32 Tantareni
21
) )
(
) ) 33 Blagoevgrad
)
installed
(
(
) ) )
(
time ) 34 Ag.Stefanos
)
(
) )
(
planned )
(
35 Bassecourt
)
(
synchronisation )
(
( (
19 ( (
36 Mettlen
44 25
1 Cartelle (
by GPS
(
(
(
37 Lavorgo
(
(
(
2 Montearenas (
( (
(
38 Soazza
( (
3 Aldeadavila (
18
(
((
39 Rondissone
(
(
4 San Sebastian de las Reyes (
26
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40 Redipuglia
(
(
27
5 Hernani (
41 Aurelia
6 Arkale
(
28 42
(
)
(
Brindisi
7 Biescas ) 43 Sorgente
8 Vic
(
) 2944 Avelgem
(
9 Rubi )
(
(
10 Benejama )
17 30
(
11 Puerto de la Cruz )
(
2 (
12 Cedillo 4 5 6
)
(
7 16
(
13 Saucelle )
)
1
)
) )
14 Albertville (
(
)
31
(
)
15 Tavel
)
)
(
)
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)
)
16 Saucats
3 )
)
)
40
17 Tabarderie
)
32
)
)
18 Lonny
)
37
)
)
19 Uchtelfangen
38
39 )
20 Hagenwerder 36
)
13
14 35 )
21 Röhrsdorf
15
22 Krajnik 42
12
23 Wielopole
8 33
41
9
24 Rogowiec
25 Polaniec (
26 Györ
45 Oujda (
27 Göd 11 34
46 Ghazaouet (
28 Sajoszöged 43
10 47 Tlemcen
29 Heviz
48 Oued Sly
49
47 48
45 46
30 Paks
49 Jijel
50 51 52
50 Biskra
51 El Aouinet
52 Tajerouine
53 53 Tataouine
page 10 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Verification of UCTE dynamic study model:
Outage of 1200 MW generation capacity in Spain (9 February 2006)
recordings simulations with study model
Thu, 2006-02-09; 11:26:47 - Generation Outage: NUEVA ESCOMBRERAS (ES) dPa=-1200 MW
50,030
50,03
f [Hz]
SS Reyes (ES)
50,020
50,010 50,01
Uchtelfangen (D)
Röhrsdorf (D)
50,000
Portile de Fier (RO)
frequency [Hz]
E /P R
SO
49,990 49,99
GR
E
P deFier
ortile
49,980
Röhrsdorf
49,970 49,97
49,960
49,95
49,950
49,940
49,93
49,930
0,00 2,00 4,00 6,00 8,0 10,00 12,00 14
11:27:20 0 ,00 16,00 18,00 20,00 22,00 24,00 26,00 28,00 30,00
11:26:35 11:26:40 11:26:45 11:26:50 11:26:55 11:27:00 11:27:05 11:27:10 11:27:15
Tim [s]
e
page 11 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Preliminary findings
the necessity of the transmission network re-enforcements mainly dedicated to
the IPS/UPS interface area,
a higher potential risk for the dynamic stability of the interconnected systems
compared to the current performance of both systems,
the adaptation and harmonisation of today’s existing defence and restoration
plans in both synchronous areas
the need for interzonal, bilateral and multilateral agreements in order to setup a
legal basis for a future reliable market platform with the focus on necessary
organisational and operational issues under the framework of EU-market
requirements and standards
The preliminary results underline that - even if a synchronous coupling mode of
operation may appear viable under the implementation of certain pre-conditions - it can
only be understood as a long term option for creating a joint electricity market platform.
page 12 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Outlook: expected results in 2008
An evaluation of the feasibility considering technical, operational,
organisational and legal aspects based on available results
An allocation of necessary measures and their associated costs to
be made on both sides of the interface.
An open outlook on non-synchronous system coupling possibilities
aiming at an economic comparison for the investigated system
coupling and an indication for the time horizon for a possible
implementation for both variants.
The final study results may form a basis for further steps under
supervision of the European Commission and other stakeholders.
Nevertheless, any decision need to be made by stakeholders
taking into account the two further fundamental pillars
- reciprocity in market conditions
- compatibility of environmental standards including
nuclear safety
page 13 Matthias Luther; 26 October 2007

The Feasibility of Synchronous Interconnection between IPS/UPS and UCTE
Visit us: www.ucte-ipsups.org
page 14 Matthias Luther; 26 October 2007