Reliability modeling of power transformers with maintenance outage

Fuzzy Logic Expert System for Optimum Maintenance of Power Transformers

Condition monitoring of power transformers improves the reliability and the safety of an electrical power network. It protects the transformers from failures, and avoids huge revenue loss to utilities and customers. The health status of transformers is decided by several influencing factors. An accurate health assessment of transformers has been a challenging task for the researchers as well as...

Reliability Evaluation Method for Oil–Paper Insulation in Power Transformers

The overall life of oil-immersed power transformers depends on the long-term life of the oil–paper insulation system throughout continuous operation. Studying the reliability assessment methods for oil–paper insulation can help determine the reliability level of power transformers accurately, and ensure their safe and stable operation. In the present paper, the life of oil–paper insulation is p...

Automated Integration of Condition Monitoring with an Optimized Maintenance Scheduler for Circuit Breakers and Power Transformers

Optimal Estimation of Weibull Distribution Parameters in order to Provide Preventive-Corrective Maintenance Program for Power Transformers

In this paper, a new method for modelling and estimation of reliability parameters of power transformer components in distribution and transmission voltage levels for preventive-corrective maintenance schedule of transformers is proposed. In this method, with optimal estimation of Weibull distribution parameters using least squares method and input data uncertainty reduction, failure rate and p...

Harmonic Modeling of Inrush Current in Core Type Power Transformers Using Hartley Transform

This paper presents a new method for evaluation and simulation of inrush current in various transformers using operational matrices and Hartley transform. Unlike most of the previous works, time and frequency domain calculations are conducted simultaneously. Mathematical equations are first represented to compute the inrush current based on reiteration and then Hartley transform is used to stud...