Experimental Study on the Influence of Micro-water Content on FDS Curve Characteristics

FDS test method based on frequency domain dielectric spectrum has abundant dielectric insulation information, no damage to insulation structure and strong anti-interference ability. It is of great significance to study the micro-water content in oil-paper insulation medium. Therefore, studying the variation characteristics of oil paper insulation FDS curve under different moisture conditions can provide theoretical basis and technical support for the evaluation of micro-water content of oil immersed insulation transformer. Therefore, this paper first summarizes the influencing factors of FDS characteristics, and then builds the FDS test platform of oil immersed insulating paper under different damp conditions; Finally, combined with the dielectric polarization response theory, the variation law of the curve under different water is described.