Experimental Study and Modeling of the Effect of ESDD/NSDD on AC Flashover of SiR Outdoor Insulators

Pollution flashover occurs when soluble and nonsoluble materials cover the surface of an insulator, this may ultimately cause a reduction in its performance. In paper, common type sodium chloride (NaCl) was used as pollutant (ESDD) kaolin (NSDD). Samples silicone rubber (SiR) insulators were selected for study fabricated at Advanced High Voltage Engineering Research Centre (AHIVEC) Cardiff University. The samples preconditioned polluted according to standard specifications. Additionally, AC voltage ramp technique achieve (FOV) with different pollution levels. aim work investigate effect on characteristics understand their interaction dry-band arcs by using FOV electrical equations experimental data. test results show that insulator substantially decreased increase both ESDD NSDD values. It also identified from these considerably influenced This impact can be quantified determining variation discharge parameters (N, n). Based data, mathematical model suggested, taking into account NSDD.