Abstract: The contamination influences the corona performance of transmission line insulator strings much. In terms of the corona-originated voltage, as well as the quantity and amplitude of the corona pulses, this paper describes the experiment on the corona current at various contaminated condition and voltage. The experimental results show that the corona pulses conform to statistic rule and can be used to distinguish the fault insulators from transmission line insulator strings in the definite environmental condition. The corona probability formulas are studied out according to the results. They can be used as one of the criterions to detect the fault insulators.
, 2004. Experimental Study on the Corona Current Characteristics of Polluted Insulators . Asian Journal of Information Technology, 3: 370-374.