1. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
National Power Grid Company TRANSELECTRICA S.A. – ROMANIA
Joint-Stock, 100% state-owned company
Operating according to Transmission and System Operator Licenses and Transmission Grid Code
Founded further to Government Decision 627/2000 by splitting former National Electricity Company (CONEL) into 4 separate legal entities
76 substations (voltage levels of 750kV, 400kV, 220kV and 110kV)

2. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
Mission:
granting third party regulated access to Transmission Power Grid
safe and cost-effective operation within an encreasing competitive market economy
Target:
- hub of electricity transmission in S-E Europe
interconnection to UCTE of Romanian Power System
transboundary electricity connections on the regional market

3. Transmission subsidiaries
Codification
750kV Ovrhead Line
400kV Overhead Line
220kV Overhead Line
Electrical Substation
MAP
Transmission subsidiaries
SERBIA
Romanian Transmission System Diagram

4. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
THE NEED FOR SUBSTATIONS REFITTING
Technological development of primary and auxiliary equipmet using state-of-the-art technology
Exceeded operational life and current condition of the equipment
Necessity of increasing the computerised degree of operation, maintenance, supervision of technological electrical systems

5. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
REFITTING METHODS APPLIED (technical matters)
Principles
Reconsidering the single line diagrams of the substations in terms of :
structural changes occurring in the related industrial environment
interconnection priorities to UCTE’s power systems
reliability of the new equipment (allowing the simplification of the connections diagram)
(CONTINUED)

6. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
REFITTING METHODS APPLIED (technical matters)
Principles
Replacing the primary and control-protection equipment at de-centralised level
Reconsidering the substation control concept at the 21st century’s technological level for the so-called ‘next generation control’
Remaking the auxiliary services systems in agreement with the new requirements from the norms and to a performance level
(CONTINUED)

7. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
REFITTING METHODS APPLIED (technical matters)
Principles
Remaking the construction part and the cables system
Minimaizing of the impact upon the national power system reliability
Minimizing of impact upon environment

8. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
GATHERED EXPERIENCE
with refitting/extending the electrical substations Portile de Fier, Tantareni, Urechesti, Arad, Mintia
‘turn-key project’
harmonising the Romanian norms and standards to the suppliers’
legislation and equipment solutions
unity of technical solutions of a project
simplifying of the substation one-line diagram
finding and applying proper financing schemes

9. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
GATHERED EXPERIENCE
with refitting/extending the electrical substations Portile de Fier, Tantareni, Urechesti, Arad, Mintia
applying the legislation of quality assurance environmental protection and installation security
supervising the project development using a dedicated software
ensuring of balanced geographical coverage

10. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
CRITERIA FOR SUBSTATION REFITTING HIERARCHY – BASE OF RELIABILITY & IMPORTANCE METHOD
The physical wear and the obsolescence of the technological electric installations that determine their technical condition
The importance of the substations for the safe operation of the NPS
The electricity transmitted yearly through the substations
The economic-financial criteria
Synchronous and asynchronous interconnection to the neighbouring electric power systems

11. Romania – Transelectrica S.A. Substations refitting
Codification
-Refitted/extended substations
-Substations in different stages of refitting/extending
- Substations to be refitted after 2005
-Substations being refitted on C&P (investments) completed with advanced maintenance works (including replacement of primary equipments)
-Substations forseen to be refitted by advanced maintenance works completed with investment works
-Substations with advanced maintenance works underway
MAP II
SERBIA
Romania – Transelectrica S.A.
Substations refitting

12. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
Tantareni 400kV Substation (commissioned 2002)

13. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
Urechesti /110kV Substation (commissioned 2002)

14. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
Iron Gates /110kV Substation (commissioned 2002)

15. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
Arad 400kV Substation (extension)

16. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS
CONCLUSIONS
The realistic approach to the refitting projects of the substations in the ETG is based on a stable and modern strategy that:
is conceptually structured in technical terms by means of advanced equipping solutions and the control of the electrical technological process at current world level
is based on multi-criteria methods determining the sequence of refitting projects start up
uses the global solution of “turnkey project”
provides an efficient project management carried on by the Project managers
monitors the project development at different competence levels using a specialized software
uses experience gained by already refitted substations in Romania