Combining with optical fiber transmission technology and digital signal processing technique

a leakage current monitoring system for iced insulators based on fiber optic transmission was developed by making use of multiple channel and high precision data synchronous collecting cards.The software for the system was programmed with virtual instrument technology.In this paper

the designs of the leakage current sensor and protective device as well as the design consideration and functions of the software are described.This leakage current monitoring system was validated by the flashover tests of artificially iced insulator strings in the artificial icing laboratory of Wuhan High Voltage Research Institute of SGCC.