An on-line geographical information system–based condition monitoring system for 11-kv distribution line insulator

Overhead distribution lines can be considered as tributaries of a distribution system, traversing difficult terrain under harsh climatic conditions. Thus, insulators on distribution lines are prone to damage. A damaged insulator causes distortion of the electric field around it, generating leakage currents, which further damage the surface of the insulator, leading eventually to ground faults. Several computer-aided systems have been adopted by electric power utilities for continuous monitoring of the distribution system by distribution control centers (DCC) [1]–[7]. These systems frequently use technologies such as image processing to conduct electrical and physical tests on the distribution lines [8]–[12].