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REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS

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

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REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS

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  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. 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 21stcentury’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. 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 400220/110kV Substation (commissioned 2002)

  14. REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS Iron Gates 400220/110kV 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

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