Applications of FEM in condition monitoring of transformer clamping system

Abstract

Power transformer condition monitoring is an important topic in both research and practice. However, condition monitoring of power transformer winding clamping system is rarely discussed. As a result, no reliable condition monitoring technique has been developed to assess the condition of power transformer winding clamping system. However, Finite Element Modelling (FEM) based simulations can be utilised to understand the complex behaviour of winding clamping structure under different operating conditions and then acquired knowledge can be used to improve the accuracy of existing condition monitoring techniques. Therefore, this study reviews the research status in use of FEM based simulations in condition monitoring and diagnosis of power transformer winding clamping system.

Measurements on pressboard to understand the effect of solid insulation condition on monitoring of power transformer winding clamping pressure

“…8c. Data were calculated using the FEM-based simulation technique described in [27]. In this transformer, 25% of the total winding height is composed of solid insulation materials, which is typically about 30% for a power transformer [28].…”

Understanding the moisture temperature and ageing dependency of power transformer winding clamping pressure

“…To this end, considering the flexibility, instead of laboratory investigations, a software-based modelling technique was adopted to investigate the dynamic nature of the winding clamping pressure of an operating transformer. A detailed description of the software based model formulation and simulation results are presented in Chapters 5 and 6 of this thesis.Finite element modelling of winding clamping system[27,98,113,114] Introduction As discussed in Chapter 2, winding clamping pressure of a power transformer correlates highly with the through-thickness compression behaviour of pressboard. According to the existing publications reviewed in Chapter 3 and experimental results presented in Chapter 4, throughthickness compression behaviour of pressboard is highly moisture, temperature and ageing dependent.…”