Frankfurt (Germany), 6-9 June 2011

A low - cost high performance MV RMU with circuit breakers for use in remote

controlled MV / LV substations

Fabio GIAMMANCO Luca GIANSANTE

Frankfurt (Germany), 6-9 June 2011

• 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

Main content

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

Italian AEEG regulation scenario

Italian Authority for Electrical Energy and Gas (AEEG)

CUMULATIVE DURATION OF LONG LASTING

SUPPLY INTERRUPTION PER LV CUSTOMER

> 3 minutes• Planned

• Accidental with fault localization

• Accidental without fault localization

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

Italian AEEG regulation scenarioFRAME 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)

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

Italian AEEG regulation scenario

FOCUS

• DURATION OF LV CUSTOMER SUPPLY

INTERRUPTIONS

• NUMBER OF SUPPLY INTERRUPTIONS WITHOUT

NOTICE PER LV CUSTOMER

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

Main strategies

1. REDUCE THE TIME NECESSARY TO FIND AND ISOLATE THE FAULT KEEPING IT AS SHORT AS THE 3 MIN DEADLINE

2. MINIMIZE THE NUMBER OF CUSTOMERS AFFECTED BY THE FAULT

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

Limits of current switchgear

SWITCH DISCONNECTORS MAIN LIMITS

• OPERATION TIME

• MAKING AND BREAKING CAPABILITY

• ELECTRICAL AND MECHANICAL ENDURANCE

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

THE GOAL

TO OVERCOME THE SWITCH DISCONNECTOR LIMITS WHILST FINDING

A GOOD TRADE-OFF BETWEEN THE NEED FOR THE EXPECTED PERFORMANCE AND LIFETIME COSTS

Overcome apparatus limits

Frankfurt (Germany), 6-9 June 2011

CIRED WIEN 2007 CIRED PRAGUE 2009

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

Overcome apparatus limits

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

With ICS DY800

Overcome apparatus limits

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

New approach

Compact RMU with circuit-breaker per each line with disconnector and grounding switch

Configuration: 2LineCB + 1PT

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

State of the art: DY900

Underwater immersion resistant

Compatible with remote control smart units

High perfomance

Highly reliable in polluted networks

Frankfurt (Germany), 6-9 June 2011

• 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

Results

Frankfurt (Germany), 6-9 June 2011

High level of

performance and economy

Adoption of SF6

insulated solutions

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

Results

Reliability andoperational safety

Environmental issue

Frankfurt (Germany), 6-9 June 2011

• 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

Next developments

Frankfurt (Germany), 6-9 June 2011

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468

Next developments

Frankfurt (Germany), 6-9 June 2011

THANKS FOR YOUR ATTENTION

Luca GIANSANTE – ITALY – Session 3 – Paper ID0468