DOI: https://doi.org/10.15802/etr.v0i7.42293

Condition evaluation in monitoring systems of traction substations power transformers

С. П. Денисюк, І. В. Притискач

Abstract


Malfunction of power transformers directly affect the reliability of the power system as a whole, which explains the high demands placed on their reliability. To detect defects in transformers at an early stage of development the most effective are continuous monitoring system that evaluates the current state. This article examines the possibility of using different models of the physical processes that affect the state of the transformer as part of the monitoring system. The most commonly damaged part is transformer insulation system that suffers from the thermal, electrical and mechanical influences. As thermal model for use in the monitoring of power transformer may be proposed a model described in the standard IEC and IEEE, and a more accurate models described in the modern works. To assess the residual life and the admissibility of certain modes of load monitoring system is proposed to use a more accurate, compared to deterministic, stochastic models of processes in transformer.

Keywords


monitoring; power transformer; state assessment; electricity supply system; thermal model; load capacity; water content model

References


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