Network Sensitivity Analysis in Insulation Fault Monitoring of Power Transformer

E. Qiang, X. Yang, and Z. Wu (PRC)


Bergeron method, network sensitivity, power transformer.


Network function analysis is being developed for both the impulse test and monitoring of power transformer and offers advantage of fault identification and location. A three-phase equivalent circuit of power transformer based on the Bergeron method is introduced in this paper. The network sensitivities of two kinds of network functions are analyzed and compared in order to evaluate the insulation condition more efficiently. Grounding insulation faults with various intensities are simulated and the results show the potential contribution to insulation fault monitoring and location.

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