Investigation of voltage transformers operating modes in networks with insulated neutral terminal at non-symmetric modes

Abstract

Ferroresonance and processes at one-phase grounding inside networks with insulated neutral terminal are investigated. It is shown that the mode with unidirectional arc, at which direct current passed in high voltage windings is the most difficult operating mode for the transformer. The influence of the secondary voltage transformer load upon the stability of ferroresonance oscillations has been also investigated.