Abstract In response to the problem of transformers blowing up or even burning together with detuning devices in recent years, an assessment method based on equivalent transformer winding currents is proposed for potential (Potential Transformer, PT) low and medium voltage distribution networks. Firstly, damage mechanism analyzed thermal breakdown identified as main cause insulation. At same ti...

Frequency Response Analysis (FRA) is popular technique which has been used since the last decade as a diagnostic method for transformers. However, accurate interpretation of FRA measurements is still challenging. Recent studies reveal that apart from winding deformation, FRA data can also be influenced by moisture variation in transformer paper insulation. Hence, a specific transformer’s model ...

Fault-tolerant current-limiting (FTCL) high-temperature superconducting (HTS) transformers are promising components for playing a role in renewable energy integrated modern power systems. In this article, the impact of different insulation materials and cryogenic coolant fluids on electro-thermal characteristic an MW-scale FTCL-HTS transformer is investigated. For purpose, equivalent circuit mo...

In recent times, the suitability of some oils from edible fruits as a replacement for mineral used in transformers has been proven different literature. The use transformer insulation fluid gives rise to concept green transformers. Research oil production one major researches high voltage engineering. existence paucity knowledge on bush mango dielectric led idea this research work. Therefore, s...

This work presents the effect of nanoparticles (Al2O3 and TiO2) on methyl ester synthesized from palm kernel oil for oil-filled power equipment. It investigates loss tangent, AC conductivity, breakdown strength ester-based nanofluid. The surface was functionalized with oleic acid before dispersing it into to modify stability mixture. Scanning electron microscopy coupled dispersive X-ray done tw...

High-voltage transformers are among the most important elements in an electric-power system. Each one of them is affected by various external factors: overvoltage, partial discharge (PD), overheating, vibrations, etc., which created a strong electric field, thermal effect, humidity, impurities, factory defects, dissolved water and gas oil-type-transformer insulation. These other factors, caused...