An Approach for Determining Load-Dependent Monetary Assessment Factors for Oil-Immersed Transformers Within a Load Flow Simulation

This paper presents an approach enabling a load-dependent monetary assessment of oil-immersed transformers to be used as part of an optimization process in enhancing a simulated power grid's operational management. The IEEE's loading guide is used to determine life expectancies for varying load percentages. The transformer's hotspot temperatures are approximated in dependency of its respective ampacity. By correlating adjusted life expectancies and initial investment costs, an annual deduction rate is determined. This value represents a monetary assessment factor which can be indicatively used in specifying control measures for various system states.