Risk Analysis of Integrated Energy System Based on Security Boundary

Abstract

In the face of an increasingly diversified energy supply, integrated energy systems (IES) are playing an increasingly important role. The operational risks of complex and diversified IES have also significantly increased. This article proposes an IES risk analysis based on security boundaries. Firstly, using the multi-energy flow equilibrium equation, construct equality constraints for the safety boundary. Then, N-1 safety analysis is conducted on each critical pipeline and equipment using the predicted accident set to obtain safety boundary inequality constraints. By combining the equality and inequality constraints of the safety boundary, the system safety boundary is solved, and the IES risk indicators are determined using the relationship between the operating state points and the safety boundary. Finally, the feasibility and effectiveness of the method were verified by calculating an example of electric heating combined supply.