Multidimensional Evaluation Methodology for Integrated Energy Systems in Industrial Parks Considering the Impact of Extreme Freezing Weather Conditions

Park Integrated Energy Systems (PIES) face issues of reliability and multi-energy coupling under extreme freezing weather conditions. This study proposes a multidimensional dynamic evaluation system comprising a three-layer index system (foundation, resilience and emergency) with innovative indicators such as the line icing risk rate. This system is coupled with a meteorologically corrected FAHP-EWM hybrid model and an improved TOPSIS method. Validation in a southern Chinese industrial park shows that this method increases the weight of the line icing risk rate by 58.3% compared to the FAHP-TOPSIS method, and the weight of the heat network frost margin by 69.6%. It also reduces computational time by 60% compared to the FAHP-TOPSIS method and by 33.3% compared to single entropy weighting. The method achieves an MAE of 0.34, enabling efficient assessment of the resilience of PIES.