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Network Challenges in a Low Carbon Future

Network Challenges in a Low Carbon Future. Jenny Cooper – Transmission R&D, National Grid. Outline. Background – Electricity Network Uncertainty Risk Management via Connection and Reinforcement of the Electricity Network Operational uncertainties and risk - Managing the system Conclusions.

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Network Challenges in a Low Carbon Future

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  1. Network Challenges in a Low Carbon Future Jenny Cooper – Transmission R&D, National Grid

  2. Outline • Background – Electricity Network Uncertainty • Risk Management via Connection and Reinforcement of the Electricity Network • Operational uncertainties and risk - Managing the system • Conclusions

  3. Our Electricity Transmission business - UK • National Grid owns the transmission system (>275kV) in England and Wales • National Grid is the System Operator for entire GB transmission network

  4. The only certainty is change

  5. The challenge • For the industry • Deliver this future: • Sustainably • Securely • Economically • For National Grid • Connecting generation & reinforcing the network • Operating the system 5

  6. The main challenge! 6

  7. Offshore wind penetration 7

  8. Risk Management via Connection and Reinforcement 8

  9. Major System Reinforcements • Proposed 2020 Network • Based on Gone Green scenario • Intra network-HVDC links • Thyristor Controlled Series Compensation • Multiple Quad Boosters • High boundary transfers • Complex fault management • http://www.ensg.gov.uk/index.php?article=126

  10. Electricity Transmission System - Today

  11. Electricity Transmission System - 2030

  12. Technical Challenges - Onshore • Many new technologies for the onshore system • Embedded HVDC • Series Capacitors • Wide Area Monitoring • Dynamic Ratings • Etc. • Aim is to enhance the performance of the existing network

  13. Technical Challenges - Offshore • This is the BIG Challenge! • New technologies – not just for the UK • VSC HVDC • Multi-terminal HVDC • Very large connections (>11GW) • Rapid introduction of new technology to the UK • Offshore Development Information Statement: http://www.nationalgrid.com/uk/Electricity/ODIS/

  14. Infrastructure Costs • Estimated costs to deliver the future • £5bn to deliver onshore reinforcements • Gone Green Scenario • £15.9bn for radial solution • £11.5bn for integrated solution

  15. Operational uncertainties and risk - Managing the system

  16. Changing the fuel mix: Gone Greenchanging dependencies 2010 2020 2010 Summer Minimum 2010 2020 100GW 70GW Interconnectors Interconnectors Wind Wind Wind Nuclear Gas Summer Minimum Demand Generation Gas 2020 Oil Wind Coal Coal Nuclear Nuclear Nuclear Demand Summer Minimum Demand Generation High winds exceed minimum system demands - constrain off, build more interconnectors or increase storage Potential greater reliance on gas for balancing Need for high level of generation capacity - some with very low utilisation

  17. Generation greater than demand! Intermittency 3 month period modelled using 2005 demand data and projected 2030 levels of wind

  18. Indicative Short Term Operating Reserve Requirement - 2020

  19. Operations Challenges • Intermittency • Generation forecasting • Reduced system Inertia • Increased variation in flows across the system • Different demand profiles

  20. Conclusion • Many challenges to come • We need to understand the issues and work to develop solutions • Need to know the “unknown unknowns” • Need as much research as possible • Energy Storage – would solve a lot of problems

  21. Thank You!Any Questions?

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