Abstract

The integrated power and natural gas system (IPGS) is a promising technique against extreme weather. In this letter, a valley-shaped resilience model is proposed to evaluate the performance of IPGSs under extreme weather and inter-energy assistances between the electric power sector and the natural gas sector. Furthermore, a quantification metrics framework for IPGS resilience evaluation is raised. Novel metrics are proposed, especially the distortion rate (<inline-formula> <tex-math notation="LaTeX">$\varTheta $ </tex-math></inline-formula>) and linepack effect (<inline-formula> <tex-math notation="LaTeX">$\varDelta t^{*}$ </tex-math></inline-formula>) for quantifying coupling tightness and assistance from natural gas transient in resilience perspective respectively. Evaluation on different restoration strategies is conducted to validate the effectiveness of the proposed metrics framework.

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