Resilience Analysis of Integrated Electricity and Natural Gas Energy System Under Extreme Events

Abstract

Research on resilience of integrated electricity and natural gas energy system under extreme events is implemented, classifying natural disasters and proposing resilience indexes and analysis frameworks for integrated energy systems. On this basis, the mesh grid approach is used to simulate the disruption of energy system caused by natural disasters. The surface natural disasters and geological natural disasters are described with three-state and four-state Markov state transition models respectively. Then a minimum load shedding model of the integrated energy system is developed, and the resilience index is calculated with Monte Carlo simulation. Finally, an integrated electricity and natural gas energy system consisting of IEEE 30 power transmission system and 13-node gas transmission system is used for case study to verify validity and practicability of the proposed integrated energy system resilience analysis method. Results show that coupling operation of electric network and gas network is more resilient, and with deepening of disaster degree, the effect of coupling operation on resilience enhancement is weakened.