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SETTING OF TARGETS FOR CONTINUITY OF SUPPLY THROUGH BENCHMARKING

SETTING OF TARGETS FOR CONTINUITY OF SUPPLY THROUGH BENCHMARKING. DOUGLAS J.A.K. and CASTRO SAYAS F. PB Power Ltd. - United Kingdom. RELIABILITY INDICES. The principal reliability indices (SAIFI, SAIDI, CAIDI) and treatment thereto differ between countries:

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SETTING OF TARGETS FOR CONTINUITY OF SUPPLY THROUGH BENCHMARKING

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  1. SETTING OF TARGETS FOR CONTINUITY OF SUPPLY THROUGH BENCHMARKING DOUGLAS J.A.K. and CASTRO SAYAS F. PB Power Ltd. - United Kingdom

  2. RELIABILITY INDICES The principal reliability indices (SAIFI, SAIDI, CAIDI) and treatment thereto differ between countries: • duration of long interruptions exceeds • 1 minute (Australia, New Zealand) • 3 minutes (Europe – EN50160) • 5 minutes (IEEE P1366–2000) • selective exclusion of categories of interruptions (severe weather, planned interruptions, transmission interruptions)

  3. Exclusions (examples) • Great Britain - Exceptional events (severe weather) may be excluded from penalties under the Information and Incentives Programme (IIP), depending on: • impact of event and its predictability • network design and maintenance and • actions taken by company to deal with the event. • Victoria, Australia • Excludes transmission failures, widespread rare events in calculation of incentive/penalty service term (S).

  4. New South Wales, AustraliaDifferent measures of supply interruption indices

  5. FREQUENCY OF INTERRUPTIONS versus LOAD DENSITY

  6. DURATION OF INTERRUPTIONS versus LOAD DENSITY

  7. SAIFI versus PROPORTION OF UNDERGROUND CABLES – GREAT BRITAIN

  8. SAIDI versus PROPORTION OF UNDERGROUND CABLES – GREAT BRITAIN

  9. CAIDI versus PROPORTION OF UNDERGROUND CABLES – GREAT BRITAIN

  10. CUSTOMER DENSITY versus UNDERGROUNDING – GREAT BRITAIN

  11. STATUS OF COMPARISON OF CONTINUITY PERFORMANCE IN GREAT BRITAIN IIP and the Distribution Price Control Review • Ofgem, February 2003, " comparisons of Companies’ performance used to set the targets at the last price control (in 1999) were not sufficiently robust " • Ofgem, April 2003, intends to • review the overall package of output delivery incentives and • undertake a customer survey to inform a review of performance standards and the IIP

  12. Ofgem and DNOsComparing Quality of Supply Working Group

  13. Ofgem and Distribution Network Operators (DNOs)Comparing Quality of Supply Working Group • Disaggregates MV circuits by grouping similar MV circuits on the basis of three physical parameters • percentage of overhead line, • circuit length, and • customers per circuit ("customer sparsity") • to identify • key drivers in variance in performance between DNOs and • possible actions for closure of differences in performance between DNOs.

  14. REFERENCE NETWORK MODEL(UMIST) • enables the continuity performance of an MV radial network to be modelled using a number of generic reference circuits • incorporates a process for the disaggregation of a very large number of actual circuits into a limited number of reference circuits, based on key parameters, and • enables benchmarking and target setting and hence the modelling of strategic programmes of improvements to be undertaken in a comprehensive and systematic manner

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