1. A low - cost high performance MV RMU with circuit breakers for use in remote controlled MV / LV substations
Fabio GIAMMANCO
Luca GIANSANTE 1 1

2. Main content Italian AEEG regulation scenario Main strategies
Limits of current switchgear
Overcome apparatus limits
New approach
State of the Art: DY900
Results
Developments
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 2

3. Italian AEEG regulation scenario
Italian Authority for
Electrical Energy and Gas (AEEG)
> 3 minutes
CUMULATIVE DURATION
OF LONG LASTING
SUPPLY INTERRUPTION
PER LV CUSTOMER
Planned
Accidental with fault localization
Accidental without fault localization
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 3

4. Italian AEEG regulation scenario
FRAME REGULATION
DURATION OF LV CUSTOMER SUPPLY INTERRUPTIONS WITHOUT NOTICE
NUMBER OF SUPPLY INTERRUPTIONS WITHOUT NOTICE PER LV CUSTOMER
INDIVIDUAL REGULATION
NUMBER OF CUSTOMER SUPPLY INTERRUPTIONS (FOR MV CUSTOMERS ONLY)
LONG LASTING INTERRUPTIONS (LV AND MV CUSTOMERS)
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 4

5. Italian AEEG regulation scenario
FOCUS
DURATION OF LV CUSTOMER SUPPLY INTERRUPTIONS
NUMBER OF SUPPLY INTERRUPTIONS WITHOUT NOTICE PER LV CUSTOMER
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 5

6. Main strategies
REDUCE THE TIME NECESSARY TO FIND AND ISOLATE THE FAULT KEEPING IT AS SHORT AS THE 3 MIN DEADLINE
MINIMIZE THE NUMBER OF CUSTOMERS AFFECTED BY THE FAULT
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 6

7. Limits of current switchgear SWITCH DISCONNECTORS MAIN LIMITS
OPERATION TIME
MAKING AND BREAKING CAPABILITY
ELECTRICAL AND MECHANICAL ENDURANCE
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 7

8. Overcome apparatus limits
THE GOAL
TO OVERCOME THE SWITCH DISCONNECTOR LIMITS WHILST FINDING
A GOOD TRADE-OFF BETWEEN THE NEED FOR THE EXPECTED PERFORMANCE AND LIFETIME COSTS
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 8

9. Overcome apparatus limits
CIRED WIEN CIRED PRAGUE 2009
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10. Overcome apparatus limits
With ICS DY800
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11. New approach
Compact RMU with circuit-breaker per each line with disconnector and grounding switch
Configuration: 2LineCB + 1PT
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 11

12. State of the art: DY900 High perfomance
Highly reliable in polluted networks
Underwater immersion resistant
Compatible with remote control smart units
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 12 12

13. Results
DY900 is fast, accurate, reliable and easy to adapt into existing systems.
10% - 15% reduction of the cumulative duration of long lasting supply interruption per LV customer.
40% reduction of the number of interruptions per customer.
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 13

14. Results High level of performance and economy Adoption of SF6
insulated solutions
Reliability and
operational safety
Environmental issue
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 14 14

15. Next developments
Two additional configurations: 3LineCB + 1PT and 3LineCB.
Device for MV customer connection SF6 insulated with current and voltage transformer inside.
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 15

16. Next developments
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 16

17. THANKS FOR YOUR ATTENTION
Luca GIANSANTE – ITALY – Session 3 – Paper ID0468 17