The impact of reduced system inertia on system planning and HVDC interconnection

Research output: Contribution to conferencePaper

Abstract

Over the past decade, significant levels of wind and solar generation have been built in Great Britain (GB). These represent non-synchronous sources of power with little or no contribution to system inertia. Further such developments are expected along with increases in HVDC interconnection capacity with mainland Europe. This paper presents a modelling framework to study the economic impact of operating a low inertia system. It is used to study a range of scenarios for the years 2020 and 2025 and provides an assessment of economic impacts of increasing GB interconnection for two sets of limits to the rate of change of frequency (RoCoF) that would arise after a loss of infeed event. The study shows that savings of between £44 million and £247 million in 2020 and up to £539 million in 2025 can be made by increasing the maximum RoCoF settings from 0.125 Hz/s to 0.5 Hz/s and the volume of curtailment of operation of renewables and interconnector imports is much reduced.
Original languageEnglish
Publication statusAccepted/In press - 10 Feb 2020
EventCIGRE 2020 - Paris, Paris, France
Duration: 24 Aug 202028 Aug 2020
https://www.cigre-exhibition.com/

Conference

ConferenceCIGRE 2020
CountryFrance
CityParis
Period24/08/2028/08/20
Internet address

Keywords

  • system inertia
  • non-synchronous generation
  • frequency stability
  • economic assessment
  • HVDC interconnection

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    OATS: Optimisation and Analysis Toolbox for power Systems

    Bukhsh, W. A., Edmunds, C. & Bell, K. R. W., 29 Mar 2020, (Accepted/In press) In : IEEE Transactions on Power Systems.

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