A Transformer Selection and Verification Model Integrating Short-Circuit Current Calculation for Construction Temporary Power Distribution Systems

Temporary power distribution systems at construction sites exhibit strong fluctuations and notable impact characteristics in load profiles. Traditional transformer selection methods struggle to simultaneously accommodate operational load requirements and short-circuit safety constraints. To achieve scientific configuration of temporary distribution transformers, this paper develops a selection and verification model that integrates short-circuit current calculation. Through load characteristic modeling, short-circuit current assessment, and stability verification, a comprehensive quantitative evaluation system is established. The model is subsequently validated through application testing in an office building construction project within an industrial park, demonstrating its effectiveness in capacity adaptation and fault stability analysis. This research provides theoretical foundation and engineering reference for enhancing the safety and reliability of temporary power supply systems in construction environments.