Stratifying transformer defects through modelling and simulation of thermal decomposition of insulating mineral oil

The current work aims to propose an adequate thermodynamic model, in addition to proposing and evaluating two composite models for the thermal decomposition of insulating mineral oil (IMO), considering that the models based on classical diagnostic methods do not have the ability to satisfactorily re...

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Bibliographic Details
Published in:Automatika 2023-10, Vol.64 (4), p.733-747
Main Authors: Manjula, A., S, Sangeetha, Jaber, Mustafa Musa, A.A, Hamad Mohamad, Sahu, Santosh Kumar, Verma, Rajesh, Vats, Prashant
Format: Article
Language:English
Subjects:
Diagnostic systems
Dissolved gas
Dissolved gases
Empirical analysis
Gas analysis
incipient defects
Insulating mineral oil
Insulation
Mineral oils
Simulation
Sum of squares of the relative residuals
Thermal decomposition
Thermal simulation
Thermodynamic models
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Summary:The current work aims to propose an adequate thermodynamic model, in addition to proposing and evaluating two composite models for the thermal decomposition of insulating mineral oil (IMO), considering that the models based on classical diagnostic methods do not have the ability to satisfactorily reproduce empirical data. The simulation results obtained using the proposed model showed better agreement with the presented data than the results obtained using classical models. The proposed model was also used in the development of a phenomenological based diagnostic method. The characteristics of this new phenomenological proposal and the classical diagnostic methods of dissolved gas analysis are compared and discussed; the proposed method showed better performance when compared to Rogers, Doernenburg, or IEC and equivalent performance to Duval triangle method commonly used in this field of knowledge. The general procedure for applying the new diagnostic method is also described. In order to account for the event's dynamics, the suggested model in particular made it feasible to replicate intermediate scenes of equilibrium C(s). Compared to the findings from the classical models found in the literature, the two-dimensional simulation results generated with this model demonstrated a better agreement with the actual data.
ISSN:0005-1144
1848-3380
DOI:10.1080/00051144.2023.2197821