Summary
Power transformers are subjected to high-frequency electromagnetic transients originating from lightning and switching operations, which may cause excessive overvoltages and non-uniform voltage distributions along the windings, leading to insulation stress. The increasing frequency of switching events in modern power systems highlights the need for an improved understanding of transformer behavior under such conditions. This paper presents a comparative investigation of the transient response of continuous disc and interleaved disc winding configurations. An analytical (white-box) model based on constructive and geometrical parameters is developed to represent winding resistance, capacitance, and inductance through equivalent electrical networks, enabling detailed transient simulations.
Read more Read lessExperimental validation is performed through laboratory tests on instrumented windings subjected to repetitive impulse voltages, with voltage measurements taken at multiple points along the windings. The results demonstrate good agreement between simulations and measurements and provide insight into the influence of winding configuration on highfrequency transient behavior. The proposed approach supports transformer design and assessment studies aimed at enhancing dielectric performance, reliability, and power system security.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A2_10661_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Brazil |
| Study committees | |
| File size | 899 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
MARCHESAN Tiago Bandeira - Federal University of Santa Maria Brazil; STOCHERO Mateus Paiva - Federal University of Santa Maria Brazil; BENDER Vitor Cristiano - Federal University of Santa Maria Brazil; BELTRAME Rafael Concatto - Federal University of Santa Maria Brazil; C. VIEIRA Maria Cecilia - Federal University of Santa Maria Brazil; MEDEIROS Leonardo Hautrive - Federal University of Santa Maria Brazil; TENBOHLEN Stefan - University of Stuttgart Germany; PROBST Felipe Luis - University of Stuttgart Germany
Keywords
