Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Paper 0622 TOWARDS SELF-HEALING POWER DISTRIBUTION BY MEANS OF THE ZONE CONCEPT  Antti Kostiainen, ABB Oy, Finland, Presenter  Pekka Manner, Fortum Oyj, Finland  Kari Koivuranta, Fortum Oyj, Finland  Göran Wiklund, ABB Oy, Finland

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Principles of the Zone Concept Network control center

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Self-healing network IEC  Network topology  Communication  Fault location  Remote controllable devices

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Power reliability indices of the pilot case Power reliability indices of the two pilot feeders in 2010  MAIFI 10,78 pcs /customer  SAIDI 7,2 h /customer  SAIFI 18,85 pcs /customer

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Feasibility of the pilot (ph.1) investment Total investment of the pilot case is € * Customer Interruption Costs YearsTotal CIC* savings in € Profitability in €

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Case: System operation during a fault  Masala area has 20 remote controlled disconnector zones (red areas)  Masala area has two remote controlled re- closer protected zones (blue areas) 110 kV 20 kV

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622  [0 s] A fault occurs Case: Fault occurs 110 kV 20 kV

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Case: Re-closer tries to clear out the fault  [0 s] A fault occurs  [1 s] remote re-closer operates 110 kV 20 kV

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Case: The system locates the fault  [0 s] A fault occurs  [1 s] remote re-closer operates  [10 s] The system analyses and localizes the fault 110 kV 20 kV

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Case: The fault is isolated in 1 min  [0 s] A fault occurs  [1 s] remote re-closer operates  [10 s] The system analyses and localizes the fault  [1 min] remote controlled disconnectors isolate the end of the feeder 110 kV 20 kV

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Case: Back-up restoration in 2 min  [0 s] A fault occurs  [1 s] remote re-closer operates  [10 s] The system analyses and localizes the fault  [1 min] remote controlled disconnectors isolate the end of the feeder  [2 min] remote controlled disconnector restores the power from another feeder 110 kV 20 kV

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Case: The service crew fixes the fault  [0 s] A fault occurs  [1 s] remote re-closer operates  [10 s] The system analyses and localizes the fault  [1 min] remote controlled disconnectors isolate the end of the feeder  [2 min] remote controlled disconnectors restore the power from another feeder  [~100 min] the service crew fixes the fault 110 kV 20 kV

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Case: Results  3 zones suffered an outage of <2min  1 zone suffered an outage of ~100 min  Without the advanced system, the fault would have been located with time consuming trial & error method  total outage ~200 min ~1 min ~2 min ~100 min 0 min 110 kV 20 kV ~1 min

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622  Accurate fault location, including also earth faults, is crucial for fast fault isolation  Fast fault isolation enables fast power restoration  SAIDI improvement  Local automation confines the impact of a network fault to the limited area  SAIFI improvement  Utilize all ”senses” and use them to support each other. Conclusive statements

Frankfurt (Germany), 6-9 June 2011 KOSTIAINEN– FI – S3– 0622 Thank You for your attention