1. 1 Pacini IT 5.1.2 16 Barcelona 12-15 May 2003 Improvement in the Distribution Assets Management by the Exploitation of the Innovative Component Technology and Network Developing Model M. Mazzoni, G. Pacini, P.Perna ENELDistribuzione E. Colombo- CESI

2. 2 Pacini IT 5.1.2 16 Barcelona 12-15 May 2003 NewTerms of Reference for Distribution Network Planning –load growth generally reducing –new needs for load location –reduced capital recovery time –power quality tailored on customer requirements and business objectives

3. 3 Barcelona 12-15 May 2003 New Reliability Criteria assessment of network configuration based on “n-1” criterium approaches based on probabilistic methods aimed at quantifying the costs of the reliability provided Pacini IT 5.1.2 16

4. 4 Barcelona 12-15 May 2003 New Reliability Criteria Pacini IT 5.1.2 16 The probabilistic approaches consider the failure behaviour of network components and analyse the different possible network scenarios. The aim is to meet with the quality level imposed by the Regulators, whilst optimizing the investment levels.

5. 5 Barcelona 12-15 May 2003 New Reliability Criteria Pacini IT 5.1.2 16 In practice the objective is to fully exploit the capacity of network components on account of the employment of new technologies (particularly remote control, improved reliability of components, etc.) allowing to reduce the amount of non delivered energy in case of failure.

6. 6 Barcelona 12-15 May 2003 Constraints & Opportunities of the Incoming Scenario development of the net has to cope with the new national requirements (environmental aspects) technical solutions for connection have to comply with the new rules in terms of flexibility and reliability new schemes taking advantage of the innovative technology available on the market (prefabricated & compact solutions) Pacini IT 5.1.2 16

7. 7 Barcelona 12-15 May 2003 Constraints & Opportunities of the Incoming Scenario evolution of the TLC allows to reduce the network redundancy new strategies in the development of the net (net reserve vs local reserve) new opportunities offered by the increasing diffusion of dispersed generation even if it means to solve new operating problems (voltage regulation, fault location, etc.) Pacini IT 5.1.2 16

8. 8 Barcelona 12-15 May 2003 Traditional: SS Local Back-up Ongoing: Network Back-up Models of Distribution Network Development Pacini IT 5.1.2 16

9. 9 Barcelona 12-15 May 2003 Net reserve vs local reserve Models of Distribution Network Development Pacini IT 5.1.2 16

10. 10 Barcelona 12-15 May 2003 Means to Improve the New Distribution Network Model Telecontrol for a prompt exploitation of the network reserve Simplified and Satellite Substations to strenghten the network and optimise length and losses of MV lines Pacini IT 5.1.2 16

11. 11 Barcelona 12-15 May 2003 Expected Benefits of new network strategies greater loading factor of transformers reduced length of MV lines reduced power losses reduced ground-fault current higher power quality a larger number of simplified HV/MV substation and some MV/MV satellite substation increasing the power injection points additional investment in the HV network lower then the savings achieved in the MV network Pacini IT 5.1.2 16

12. 12 Barcelona 12-15 May 2003 Innovative Component Technology HV Highly Integrated Switchgear (HIS) Very compact design SF6 insulation Fast and reliable installation at site Reduced ground area and need for civil work Factory assembled and tested Life Cycle Cost Convenience Pacini IT 5.1.2 16

13. 13 Barcelona 12-15 May 2003 TWO CB “Y2” TYPE ELECTRICAL DIAGRAM (red line) Innovative Component Technology Pacini IT 5.1.2 16

14. 14 Barcelona 12-15 May 2003 Innovative Component Technology « Y2 » SIMPLIFIED SCHEME CONNECTION Pacini IT 5.1.2 16

15. 15 Barcelona 12-15 May 2003 Innovative Component Technology MV Compact Design Switchgear in Container Air insulated Fast and reliable installation at site 68% volume reductionvs. traditional Factory assembled Reduced need for civil work Life cycle cost Convenience Pacini IT 5.1.2 16

16. 16 Barcelona 12-15 May 2003 MV COMPACT DESIGN 24kV SWITCHGEAR IN CONTAINER Innovative Component Technology Pacini IT 5.1.2 16

17. 17 Barcelona 12-15 May 2003 HV EQUIPMENT SINGLE BAY MODULE (LINE OR CABLE CONNECTION) NEW “Y2” AND SINGLE BAY MODULE VERSIONS FOR INDOOR INSTALLATIONS MV EQUIPMENT MV COMPACT SIX LINE SWITCHGEAR IN CONTAINER MV SATELLITE SWITCHGEAR IN CONTAINER COMPACT DESIGN SWITCHGEAR UPRATE ( busbar rated current 1600A, short circuit current 16kA) Innovative Component Technology New Developments Pacini IT 5.1.2 16

18. 18 Barcelona 12-15 May 2003 Innovative Component Technology New Developments SINGLE BAY MODULE (LINE OR CABLE CONNECTION) FOR A THIRD LINE BAY OR REMOTE TRANSFORMER CABLE SEALING ENDAIR BUSHING Pacini IT 5.1.2 16

19. 19 Barcelona 12-15 May 2003 Innovative Component Technology New Developments USE OF HV «Y2 » MODULE FOR “H” SCHEME FOR INDOOR SUBSTATION (CABLE CONNECTION) Pacini IT 5.1.2 16

20. 20 Barcelona 12-15 May 2003 Innovative Component Technology New Developments SATELLITE SUBSTATION ELECTRIC DIAGRAM Pacini IT 5.1.2 16 IN FEED n°1 IN FEED n°2 L 1L 2 L 3L 4 L 5 TR AUX. SERVICE