1. Frankfurt (Germany), 6-9 June 2011 ROSA – PT – S3 – 0249 EDP DISTRIBUTION AUTOMATION (r)EVOLUTION

2. Frankfurt (Germany), 6-9 June 2011  Current Situation of DA in EDP  Distribution Automation (DA) New Vision  Pilot Project Goals  New Generation Switching Devices – OCR3  Protection System and Reclosing Impacte  Pilot Network Selection  Conclusions ROSA – PT – S3 – 0249 Agenda

3. Frankfurt (Germany), 6-9 June 2011  390 Substations HV/MV  3.000 MV feeders  60.000 km MV overhead lines  2.500 MV Telecontroled switching devices on overhead MV lines Year 2012: 4.000 telecontroled devices ROSA – PT – S3 – 0249 EDP Distribution Automation - Current Situation  Network Load Break Switches (OCR 1 + OCR 2)  Remote operation and monitoring capability (OCR 1+2)  Fault interrupting capabilities (OCR2)  Voltage-time automatic functionality (OCR2)

4. Frankfurt (Germany), 6-9 June 2011 ROSA – PT – S3 – 0249 Roll-Out decision Software Simulation KOLDA excel Localization Criteria Validation Pilot Project Real Field Test & Validation Telecom Solution Specification Approach to further improve DA

5. Frankfurt (Germany), 6-9 June 2011 ROSA – PT – S3 – 0249 Results of computational study… The application of only 4 DA Switches per MV feeder may reduce the TIEPI to about half the value… The application of the first 25 DA Switches reduced TIEPI to 72% but increased MAIFI to 121% Despite the duration of interruptions to be smaller, customers are interrupted more often and may “perceive" a lower Quality of Service The subsequent application of 15 Reclosers, besides reducing the TIEPI to 56%, reduced MAIFI to figures very similar to the starting values

6. Frankfurt (Germany), 6-9 June 2011 ROSA – PT – S3 – 0249 OCR3 “Intelligent” State of the Art Recloser Magnetic Actuators Voltage & Current Sensing To be used in NO and NC positions 100% modular approach Vendor independent Integrated Control-Micro RTU Integrated Protection (I>, I>> with inverse time characteristics) Two modes: Recloser and Sectionalizer Automatic Function FCI Coupling to MV overhead line – current transformers Individual units per phase line Lightning signalling of MV faults Local devices – without communications Sensitivity to di/dt Mounting facilities with the overhead lines in service Low cost Vendor independent ANSI/IEEE 495-1986 Equipment Specification

7. Frankfurt (Germany), 6-9 June 2011 ROSA – PT – S3 – 0249 Implementation Alternative 1: Automatic faul isolation  Recloser programming: One fast reclose + one slow reclose  Sectionalizer programming: Definite open after one event of current + 5s absence of voltage  Fault isolated in 16,8s  First test option for the Pilot Project

8. Frankfurt (Germany), 6-9 June 2011 ROSA – PT – S3 – 0249 Implementation Alternative 2: Automatic network reconfig. OCR 2-2 OCR 2-1  Recloser programming: One fast reclose + one slow reclose On N.O. Points close after 20s of upstream voltage absence  Sectionalizer programming: Definite open after one event of current + 5s of absence of voltage  Fault isolated and network reconfigured in 21,8s

9. Frankfurt (Germany), 6-9 June 2011 ROSA – PT – S3 – 0249 Impact on protection system & reclosing Issues: (1)How can coordination between the substation feeder protection and reclosers be guaranteed? (2) What should be the reclosing scheme at the substation? Answers: (1) Project team proposes short grading time between reclosers and adjustments at the substation (2) Project team proposes evaluating two reclosing schemes during the field pilot.

10. Frankfurt (Germany), 6-9 June 2011 ROSA – PT – S3 – 0249 Pilot Network Selection Network requirements: (1) Earth grounded MV network (2) No investments in recent years (3) Reverse reconfiguration capacity (4) Quality of service problems (5) Additional criteria to optimize devices number and location

11. Frankfurt (Germany), 6-9 June 2011  IEC 60870-5-104 Standard protocol Relatively simple TCP/IP Multi-vendor Cost effective and efficient  GPRS Proven wireless TCP/IP technology Low cost of modem and data plan Test if a public operator can deliver very tight SLA’s ROSA – PT – S3 – 0249 Communications Protocol and Technology

12. Frankfurt (Germany), 6-9 June 2011 1 st Innovation level This pilot… Local Automation “OCR3” + FCIs Operational Flexibility Independency from Communications and Dispatch Center Grid Resilience 2 functionning modes: Recloser Sectionaliser Impact: TIEPI & MAIFI ROSA – PT – S3 – 0249

13. Frankfurt (Germany), 6-9 June 2011 Next Innovation level… (future) Hybrid Automation (central + local) Central Intelligence + OCR “…” … in the path of Smart Grids Central algorithms for grid automatic control Dumb No-Load Break Switch (Low cost OCR) Impact: TIEPI Grid automatic reconfiguration Breaking of TIEPI saturation trend ROSA – PT – S3 – 0249

14. Frankfurt (Germany), 6-9 June 2011  Acquisition of solutions off-the shelf  Evaluation of different suppliers  Cost and delivery time reduction  Improvement of overall quality of the equipments  Philosophy change in Distribution Automation  Decision for subsequent country roll-out ROSA – PT – S3 – 0249 Conclusions

15. Frankfurt (Germany), 6-9 June 2011 Thank you for your Kind attention ROSA – PT – S3 – 0249 END