Resilience-based Hardening Approach for Integrated Power and Natural Gas Systems

Integrated energy systems (IES) are the best way to handle environmental concern and energy crisis. But it can also make energy systems more vulnerable. What's worse, the extreme events such as natural disasters and malicious man-attack become more frequent, which bring huge challenge to IES. Improving the resilience has become an inevitable requirement for the development of IES. In this paper, a resilience based hardening approach for integrated power and natural gas systems is presented, this approach can determine where to install gas generators and gas storages to improve resilience. The effects of the extreme events are discussed because multi-failure scenarios are considered when it comes to resilience. The stochastic optimization model of integrated power and natural gas systems (IPGS) is established. The piecewise linearization method is adopted for nonlinearity. The Monte Carlo method and progressive hedging algorithm are adopted to improve the solving efficiency. A modified IES is adopted to demonstrate the validity of the proposed approach.