A fuzzy multiple criteria decision-making approach for converter transformer fire extinguishing system based on VIKOR model

There are many fire and explosion accidents involving converter transformer due to its complex structure. In order to ensure the safe operation of the equipment, this paper develops a comprehensive fuzzy evaluation method for converter transformer fire extinguishing system based on VIKOR model. As the reliability against fire and explosions of the fire extinguishing systems are rarely considered in the previous study, the index system in this study is constructed considering the effectiveness, reliability against fire and explosion, and cost of the fire extinguishing systems. To determine more justified weights for criteria with consideration of subjective and objective weights, the solution of Nash equilibrium was taken as the object of coordinated optimization to integrate the fuzzy AHP weight and entropy weight (EW). Then, the relative nearness degree between the evaluation plan and the ideal plan could be calculated based on VIKOR model. A case study was conducted to demonstrate the effectiveness of the proposed method. Finally, the effectiveness and practicality of the proposed hybrid multi-criteria decision making (MCDM) approach was demonstrated through a case analysis of five representative substation fire extinguishing systems in China.