Reliability Evaluation of Integrated Electricity–Water System Based on Multi-State Models of Equipment in Water System

The power system and the water system are two important infrastructures of human society that are closely related and interdependent. However, the reliability problems of the power system and water system are becoming more and more prominent. To better reveal the impact of the complex coupling relationship between the power system and the water system on the reliability of the Integrated Electricity–Water System (IEWS), this paper investigates a reliability evaluation method of the IEWS based on multi-state models of equipment in the water system. Firstly, a multi-state reliability model is established based on the failure mechanism of equipment in the water system, such as pipes and Reverse Osmosis (RO) desalination plants. Secondly, combined with the multi-state model of equipment in the water system and the Markov chain Monte Carlo (MCMC) method, the IEWS reliability evaluation method is established. Finally, two IEWSs with different scales are simulated to verify the validity and adaptability of the proposed model.