Abstract
This paper presents the first multi vector energy analysis for the interconnected energy systems of Great Britain (GB) and Ireland. Both systems share a common high penetration of wind power, but significantly different security of supply outlooks. Ireland is heavily dependent on gas imports from GB, giving significance to the interconnected aspect of the methodology in addition to the gas and power interactions analysed. A fully realistic unit commitment and economic dispatch model coupled to an energy flow model of the gas supply network is developed. Extreme weather events driving increased domestic gas demand and low wind power output were utilised to increase gas supply network stress. Decreased wind profiles had a larger impact on system security than high domestic gas demand. However, the GB energy system was resilient during high demand periods but gas network stress limited the ramping capability of localised generating units. Additionally, gas system entry node congestion in the Irish system was shown to deliver a 40% increase in short run costs for generators. Gas storage was shown to reduce the impact of high demand driven congestion delivering a reduction in total generation costs of 14% in the period studied and reducing electricity imports from GB, significantly contributing to security of supply.
Highlights
The interactions between energy supply vectors such as power and gas were relatively unexplored [1]
This paper presented the first multi vector energy analysis for the interconnected energy systems of Great Britain and Ireland
A simulated extreme weather event resulting in high gas demand from both the power system and domestic gas consumers was simulated in order to understand the interactions between both energy vectors
Summary
The interactions between energy supply vectors such as power and gas were relatively unexplored [1]. By 2030, installed wind and gas generation capacity in Irish and British power systems will be 78% [2] and 67% [3] respectively. The requirement of gas system operators to consider the impacts on power system operation when dealing with outages over a short time frame was highlighted in [6]. Both [7,8] show how power system security is negatively affected due to outages on the gas transmission network.
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