DIGITAL TWIN OF A OIL-IMMERSED POWER TRANSFORMER – CONCEPT OVERVIEW AND DEMONSTRATION VERSION OF THE DT SYSTEM

This paper presents the concept of a Digital Twin (DT) for an oil-immersed power transformer (OIPT), which serves as the foundation for developing tools for monitoring, diagnostics, and exploitation optimization, based on the principles of the Fourth Industrial Revolution. The proposed concept emphasizes system modularity, achieved by the use of microservices. Microservices enable the gradual expansion of the system and the application of both simple and complex models under realistic conditions. The practical application of the concept is illustrated through the development of a demonstration DT system for monitoring key physical processes such as temperature change, cooling efficiency, and insulation thermal aging. The demonstration system simulates real-time operation using archived operational data. It integrates physics-based and artificial intelligence (AI) models, along with visualization modules and service functions. The presented concept highlights the potential of DT technology to support decision-making, predictive maintenance optimization, and allows further development and integration with existing power system infrastructures.