Experimental Research on Lightning Disturbance Characteristics of 10-kV Fusion Voltage Transformer Intelligent Component Acquisition Port

Abstract

In the lightning impulse test, the 10 kV fusion voltage transformer intelligent component acquisition port often suffers from functional failure or breakdown. In this paper, experimental measurement and inversion calculation were used to study the electromagnetic disturbance level of smart component acquisition port. During the inversion calculation, the applicability of the dual exponential function model, Heidler function model, and impulse function model as the primary source for describing the lightning impulse device were compared and analyzed. The results show that the double exponential model was used as the calculation source of the primary side lightning waveform, and the inversion calculation results were in good agreement with the actual measurement. In addition, the effects of the primary side lightning voltage peak, wave head, and wave tail parameters on the maximum amplitude of the disturbance waveform calculated by inversion are discussed and analyzed. Based on the analysis results, a sufficient inversion calculation parameter was proposed to estimate the disturbance level of the intelligent component acquisition port. Finally, the measured results were compared and discussed with the IEC 61439 assessment level, and it was suggested that the assessment level of fusion equipment should be modified. INDEX TERMS Electromagnetic interference (EMI), lightning impact test, inversion calculation, port disturbance voltage, smart component, lightning model.

Test and Analysis on Electromagnetic Disturbance of Digital Unit of Primary–Secondary Integrated 10kV Circuit Breaker

“…In addition, domestic scholars have also carried out some research on the electromagnetic disturbance on the secondary side of the primary and secondary integration column circuit breaker transformer under lightning-stroke conditions. The results show that although the lightning wave with a dominant frequency lower than 1MHz is applied to the primary side, the damped oscillatory wave with a frequency up to tens of MHz can also be caused at the secondary side, which will greatly affect the accuracy of the AD acquisition module in the FTU [32][33][34]. It should be noted that, due to the complex configuration of the breakers and the randomness of arcing during switching operation, the numerical simulation is usually too difficult to be implemented.…”