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Security of Supply from the Power System

This comprehensive overview by Dr. Graham Ault highlights the current state of electricity security, addressing risks, ongoing projects like Ofgem's LENS, and the evolving interplay between generation reliability and network stability. It discusses trends, policy implications, and the necessity for adaptation in response to regional and technological changes. The report emphasizes the importance of communication infrastructure and the integration of various energy networks, ensuring a balanced approach to new energy source connections that do not compromise network security.

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Security of Supply from the Power System

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  1. Security of Supply from the Power System Dr. Graham Ault Institute for Energy & Environment

  2. Outline • Current arrangements for electricity security • Risks to current security position • Outcomes of the Ofgem LENS project • Trends, targets, policies, threats and opportunities

  3. Security from Generation • Adequacy • Reliability • Generation • Demand

  4. Security from the Power Network • Transmission planning • Transmission operations • Distribution • Angular stability • Voltage stability • Thermal limits

  5. Security from the Power Network

  6. Risks to current security position • Changes in plant margin (consenting/planning, LCPD) • Different generation technologies (‘capacity value’ of plant margin) • Desire for cheaper and quicker generation connections • Evolving demands for electrical energy • Regional (‘transmission group’) differences • Development of offshore grids • Inter-connectors to EU mainland • Growing commercial value of electricity transport • Ageing network assets

  7. Ofgem LENS project • Commissioned to inform various debates about the future of networks in GB • Scenarios chosen to provide a mechanism to bring together all issues, drivers and concerns

  8. Outcomes of the LENS project • Broad range of plausible outcomes for networks in the longer term • relatively large amount of uncertainty • status quo does not look likely • stranding of assets might be more tangible in future • Information and communications infrastructure plays an important role across the scenarios supporting generation (all scales), network and demand side activities - and often a mix of all three • Interaction and interdependence of different networks grows over time (transport, gas, electricity, heat, communications) – this adds complexity • Closer operational and planning relationship between transmission and distribution entities likely under several scenarios

  9. Implications of trends, targets and policies • Architecture of Scottish power system is already changing but is likely to change at significant rate over the coming years • Transmission: new EHV routes developed, existing EHV circuits upgraded, HVDC interconnection, power electronics compensation, offshore connections, EU interconnection • Distribution: more activity in generation and consumer demand response, penetration of new technologies (communications, control, smart meters, energy storage • Security will be central to energy policy choices and network development paths • Balancing need for efficient connection of new energy sources without compromising network security • Work to be done to revise and adapt security standards to keep pace with change

  10. Rising to the Security Challenge • Network companies: • Transmission and distribution owners • GB system operator • Industry governance groups: • GB SQSS • Grid Code • CUSC • ENSG • Research: • EPSRC SuperGen programmes • ‘UK Centre for Wind Energy Research’ (ETI and DTC) • DECC Centre for Sustainable Electricity and Distributed Generation • Industrial funded network research partnerships (SSE, SP, BE)

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