Frankfurt (Germany), 6-9 June 2011

KOSTIAINEN– FI – S3– 0622

Paper 0622TOWARDS 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 61850

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 134 000 €

* Customer Interruption Costs

Years Total CIC* savings in €

Profitability in €

1 28 000 - 106 000

2 55 000 - 80 000

3 79 000 - 56 000

4 101 000 - 33 000

5 122 000 - 12 000

6 142 000 7 000

7 159 000 25 000

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 occurs110 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