Frankfurt (Germany), 6-9 June 2011 M.Sc. Terje Pynten, Dr. Jan Andor Foosnæs, M.Sc. Johan G Hernes, M.Sc. Erling Tønne NTE Nett AS Paper 0696 Finding maintenance.

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Presentation transcript:

Frankfurt (Germany), 6-9 June 2011 M.Sc. Terje Pynten, Dr. Jan Andor Foosnæs, M.Sc. Johan G Hernes, M.Sc. Erling Tønne NTE Nett AS Paper 0696 Finding maintenance project to priority

Frankfurt (Germany), 6-9 June 2011 Ageing of the power system Presumptions: Lifespan of lines ~ 40 år NTE Nett AS must replace 108 km/year. Lines are replaced 1:1This is a 400 % increase from today. Installed MV lines per year

Frankfurt (Germany), 6-9 June 2011 Wide and sparsely populated area 80 % of the transformers supplies less than 17 customers. Approximately 19 customers per km MV line. Number of customers per transformer (cumulative distribution)

Frankfurt (Germany), 6-9 June 2011 Efficiency  The annual income cap does not give good enough incentives to do reinvestments.  The network companies must be able to build more MV lines per Euro.  Simplifying the grid structure.  New technologies and new solutions  Choosing the right projects and implementing them in the optimum order.  Effective data acqusition and processing with quality and accuracy.

Frankfurt (Germany), 6-9 June 2011 New technologies – new solutions  New and improved building material Reducing construction, maintenance and operation costs  New solutions Reduced operational costs More optimal usage of grid capacity / increased control of the power flow Improved state estimation Extended life span in parts of the network

Frankfurt (Germany), 6-9 June 2011 Priority process Typical parameters in the assessment process Safety of supply Regulatory requirements Terms of concession Condition monitoring and inspections Fault and interruption statistics Technical state / indicators Technical calculation / LCC Experience and local knowledge Climatic and environmental factors Maintenance friendliness Load composition New technology Costs of energy not supplied Aesthetics Age Regulation of revenue Framework Basis for decision making Technical and economic analyses Analysis methodology Preventive maintenance Renewal / Reinvestments Decisions Expected corrective maintenance Criteria: -HSE -Technical -Risk Criteria: -HSE -Technical -Risk

Frankfurt (Germany), 6-9 June 2011 Data acquisition Present: Manual data acquisition/state estimation. External resources are used. Large variation in data quality (experience, character references and accuracy). Future: Smart technology (automatic data acquisition) New methods Photo of a rotten traverse taken from a helicopter

Frankfurt (Germany), 6-9 June 2011 Smartgrid pilot in Steinkjer  NTE in partnership with The Norwegian Smartgrid Centre.  Main scope: To gain knowledge and practical experience by using smartgrid technologies to operate the energy system more effectively regarding:  Economy  System reliability  Quality of delivery  Occupational health and safety  Environment, aesthetics

Frankfurt (Germany), 6-9 June 2011 Smartgrid pilot in Steinkjer - Location 772 customer og 30 substations