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Cost-optimised Maintenance Strategy for 110 kV-Networks Dr. Markus Zdrallek RWE Net AG Germany

Cost-optimised Maintenance Strategy for 110 kV-Networks Dr. Markus Zdrallek RWE Net AG Germany. 4. Step: Optimised maintenance strategy. 2. Step: Assignment to components Which part of network’s non-reliability is caused by an individual component ?. 1. Step: Reliability Calculation

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Cost-optimised Maintenance Strategy for 110 kV-Networks Dr. Markus Zdrallek RWE Net AG Germany

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  1. Cost-optimised Maintenance Strategy for 110 kV-NetworksDr. Markus ZdrallekRWE Net AGGermany

  2. 4. Step: Optimised maintenance strategy 2. Step: Assignment to components • Which part of network’s non-reliability is caused by an individual component ? 1. Step: Reliability Calculation • Network-, Protection- and Reliability data • MV-customers “Energy not delivered in time” • Non-reliability of the network Reliability Calculation 3. Step: Importance Index & Ranking • Each component is related to the most important component in % i Assignment to components 100% Importance index w MA-group 1 90% MA-group 2 80% MA-group 3 Imp. Index & Ranking 70% MA-group 4 MA-group 5 60% 50% 40% Optimised maint. strategy 30% 20% 10% 0% Importance of Network Components

  3. 100 MA-group 1 80 in % i 60 MA-group 2 Importance index w 40 MA-group 3 20 MA-group 4 MA-group 5 0 Substation Importance Ranking of Substations

  4. Back up

  5. Reliability Calculation Importance of Network Components 1. Step: Reliability Calculation • Network-, Protection- and Reliability data • MV-customers “Energy not delivered in time” • Non-reliability of the network

  6. 3,0 2,5 2,0 Energy not delivered in time in MVAh/a 1,5 1,0 0,5 0,0 MV-customers Result of Reliablity Calculation

  7. Reliability Calculation Importance of Network Components 2. Step: Assignment to components • Which part of network’s non-reliability is caused by an individual component ? Assignment to components

  8. 50 45 40 f (E) 35 F (E) 30 Energy not delivered in time in MVAh/a 25 81% 2% 17% 20 15 10 5 0 Cables / Overhead lines Transformers Transformer substations Assignment to components

  9. Reliability Calculation 3. Step: Importance Index & Ranking • Each component is related to the most important component Assignment to components Importance of Network Components Imp. Index & Ranking

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