Propagation and Blocking of Gas-Electric Cascading Failure

In the research of integrated energy systems, the security of gas-electric coupling networks is highly valued because of the wide use of gas-fired units (GFU). However, the propagation mechanism of cascading failure from the gas system to the power system has not yet formed a clear framework. In this paper, we present basic modes of such failure propagation in multi-energy systems. Based on the multiple time scale characteristic of gas-electric coupling networks, we also propose a blocking method of such cross-system cascading failure. The numerical example of a large-scale gas-electric coupling system based on real networks in a province of China is used to simulate the propagation and interruption of gas-electric cascading failure in practice, which confirms the basic point of this paper.