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Responsibilities of DNCC Manager Iain Ward: Optimizing Network Operations and Capacity Management

Iain Ward, the DNCC Manager, oversees key operational responsibilities, including managing licensed obligations for capacity and demand adjustments based on seasonal strategies. The DNCC operates under the direction of the Distribution Network (DN) to ensure effective supply-demand balancing and control of unbilled energy. Key tasks include forecasting and managing demand fluctuations, handling planned and unplanned plant outages, and responding to NTS change requests. Daily updates are driven by real-time weather data and consumer demands for optimal network performance.

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Responsibilities of DNCC Manager Iain Ward: Optimizing Network Operations and Capacity Management

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  1. DN Operation Iain Ward DNCC Manager

  2. Responsibilities • Licence Holder • Obligation For 1 In 20 Capacity • DNCC Operates Networks Under Direction of The DN • Winter / Summer Operating Strategy • Booked Capacities • Short Term Variations • DN Specific Issues • DNCC Makes Within-Day Decisions Regarding • Supply Demand Balancing • Control of Unbilled Energy • Plant Outage • Planned • Unplanned (faults)

  3. Daily Operations – Key Stages • Forecast Demand • Define Diurnal Profile • Programme Intakes • Manage Demand Changes • Respond to NTS Change Requests

  4. Manage LDZ Take, Demand and Stock

  5. Forecast Demand • LDZ Level • Weather Data (NDM) • VLDMC OPNs (DM) • Approx 5% Demand Change per 1 deg C

  6. 20 1ºC = 3% 18 16 14 1ºC = 6% 12 Demands 10 1ºC = 2% 8 6 4 0 5 10 15 20 25 Temperatures Demand Demands and Temperature Relationship

  7. Define Diurnal Profile • Diurnal Swing in the Range 12 – 15% • Significance of Minimum Stock Time • Storage Deficit in most DNs • Storage Utilisation in Defined Order • DN Linepack • DN LP Storage • DN Bullets • NTS Flow Variation

  8. Diurnal Profiles Demand Profile Empty Holders & Linepack, B A A C Supply Rate Storage Requirement A + B - C Fill Holders & Linepack 0600 0600 1200 1800 2400

  9. Manage LDZ Take, Demand and Stock

  10. Programme Intakes • Remote Control of Offtake Utilisation • Notifications to NTS via OPN Process • Day Ahead and Within Day Considerations • Meet Sub-LDZ Flow Requirements • Pressure vs Volumetric Control • Shrinkage Considerations • Plant Outage • Reflective of OCS Where Possible • Request Additional Flow Flex via OPN Where Necessary

  11. CV Management St Fergus / Teesside Gas (39.2 - 41.5 MJ/m3) St Fergus Gas (40 - 41.5 MJ/m3) Easington/ Rough Gas (38.1 - 38.7 MJ/m3) St Fergus / Barrow Gas (38.4 - 41.5 MJ/m3) Theddlethorpe Gas (38.2 - 38.7 MJ - m3) Bacton Gas (38.2 - 38.6 MJ/m3)

  12. Manage Demand Changes • Forecast Updated 8 Times Daily (UNC timings) plus up to 5 ad-hoc. • Respond to Revised Weather Data • Xmas period 2005; 5 degree error within day. • Rebalance DN Supply to Meet Demand Changes • Revised Offtake Rates • Impact on storage requirement • Allocation to Volumetric Offtakes; balance effect of pressure control?

  13. Respond to NTS Change Requests • NTS To Anticipate Supply Rate Changes, Commercially and Physically Driven • NTS Outages • Planned e.g. On-Line Inspection • Un-Planned e.g. Faults • NTS VLDMC renominations

  14. DNCC Offtake Performance • Booked Flat Capacity Limits Observed at DN Level • Booked Flow Flex Limits Exceeded at LDZ Level • Some Offtakes on Some Days • Pressure Controlled Flows Defined by Consumers • Within-day demand changes flow through into FlowFlex calculation.

  15. LDZ 1

  16. LDZ 2

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