REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS

1MARCIU_RO_author_Alpha5_Block1.ppt

Barcelona 12-15 May 2003

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)




• MissionMission: – granting third party regulated access to Transmission

Power Grid– safe and cost-effective operation within an

encreasing competitive market economy

• Target:Target:- hub of electricity transmission in S-E Europe- interconnection to UCTE of Romanian Power System- transboundary electricity connections on the regional

market



MAP

Romanian Transmission System Diagram

CodificationCodification

750kV Ovrhead Line400kV Overhead Line220kV Overhead Line

Electrical Substation

Transmission subsidiaries Transmission subsidiaries

SERBIA




THE NEED FOR SUBSTATIONS REFITTINGTHE 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




REFITTING METHODS APPLIED (technical matters) REFITTING METHODS APPLIED (technical matters)

PrinciplesPrinciples1. 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)





PrinciplesPrinciples2. Replacing the primary and control-protection equipment

at de-centralised level 3. Reconsidering the substation control concept at the

21st century’s technological level for the so-called ‘next generation control’

4. Remaking the auxiliary services systems in agreement with the new requirements from the norms and to a performance level

(CONTINUED)





PrinciplesPrinciples

5. Remaking the construction part and the cables system

6. Minimaizing of the impact upon the national power system reliability

7. Minimizing of impact upon environment




GATHERED EXPERIENCEGATHERED EXPERIENCEwith 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




GATHERED EXPERIENCEGATHERED 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




CRITERIA FOR SUBSTATION REFITTING HIERARCHY – CRITERIA FOR SUBSTATION REFITTING HIERARCHY – BASE OF RELIABILITY & IMPORTANCE METHODBASE 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



MAP II

Romania – Transelectrica S.A.Substations refitting

CodificationCodification

-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

SERBIA




Tantareni 400kV Substation (commissioned 2002)




Urechesti 400220/110kV Substation (commissioned 2002)




Iron Gates 400220/110kV Substation (commissioned 2002)




Arad 400kV Substation (extension)




CONCLUSIONSCONCLUSIONS

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

Documents

REFITTING STRATEGY FOR ROMANIAN POWER SYSTEM SUBSTATIONS