In this paper

the dry-type air core series reactor is taken as the research object. The method of characteristic analysis and inversion model solution of interturn short circuit fault of series reactor based on transient analysis of recorded data is proposed by analyzing the variation of electrical parameters in the process of inertturn short circuit fault of reactor. In this paper

the model of interturn arc short circuit fault of reactor is set up by studying Mayr arc model of arc black box theory and the inversion model of interturn short circuit of three-phase shunt capacitor series reactor based on time-varying parameters is set up further. By analyzing the singular points in the inversion solution process

an inversion solution algorithm of equivalent inductance parameters of fault series reactance based on spectral collocation method is proposed. The inversion model of inter-turn short circuit fault of series reactor is set up. The current harmonic fault characteristics in the process of inter-turn arc short circuit of reactor are analyzed in accordance with the inversion interpretation. The effectiveness and correctness of the fault model and diagnosis method of the inter-turn fault model of reactor are verified.