A Comprehensive Evaluation Method for Reliability Confidence Capacity of Renewable Energy Based on Improved DEMATEL-AHP-EWM

With the continuous increase in the proportion of renewable energy access, reliability confidence capacity, as an important decision-making reference for measuring the contribution of power sources to the power system, has received widespread attention in power system planning and operation. It is of great significance to scientifically and reasonably evaluate the reliability confidence capacity of renewable energy. This paper proposes a comprehensive evaluation method for renewable energy reliability confidence capacity based on improved Decision-Making Trial and Evaluation Laboratory-Analytic Hierarchy Process-Entropy Weight Method. Firstly, construct a reliability confidence capacity assessment model for renewable energy. Secondly, based on the comprehensive influence weight calculated by improving the DEMATEL method, the AHP-EWM subjective and objective weighting method based on game theory is used to establish the renewable energy confidence capacity index system and calculate the weight. Finally, simulation verification is conducted using an actual power grid in the northwest region of China as an example. The simulation results demonstrate that the proposed method has good feasibility and accuracy, and can provide decision-making support for the planning and operation of the new power system.