Experimental System Design for Surface Discharge of Solid Dielectric under Nanosecond Pulses
To foster engineering skills and innovative practical thinking in students under the context of new engineering,we established a surface discharge experimental system for solid dielectrics under nanosecond pulses.This advanced system comprises a pulse voltage generation device capable of producing voltages in the range of several hundred kilovolts with rise times in the tens of nanoseconds,a nanosecond pulse voltage measurement device,a solid dielectric surface discharge experimental apparatus,and an automatic film-changing control mechanism for biaxially oriented polypropylene film.Based on the established system,experiments for solid dielectric surface discharge and corresponding voltage measurement were designed,obtaining output pulse voltage waveforms under varying steepness conditions.The variation patterns of flashover voltage with gas pressure were determined for SF6 volume fractions of 0％,40％,80％,and 100％under pulses of varying steepness.The underlying mechanisms of the flashover voltage saturation phenomenon were investigated,and the influence of electrode spacing was analyzed through experimental studies.The test results indicate that the experimental system can be seamlessly integrated into the teaching and research of high-voltage technology courses,thereby enhancing the quality of talent cultivation in the electrical engineering discipline.
solid dielectricnanosecond pulsessurface dischargeflashover voltageexperimental system
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