Research Of An Intelligent Selection Device Based On Dual-cpu In Indirect-grounded Fault System

Neutral ungrounded system and earthed system with an arc suppression coil are widely used in our Middle and low voltage distribution network. The single-phase to ground fault will happen most frequently in distribution network. Selecting the faulty line as soon as possible will have the vital significance to ensure the systematic normal operation. Design intelligent selection device both from integrated faulty line selection method and Hardware platform to solve the difficulty problem of faulty line selection in small current grounding network. Improve a faulty Line selection algorithm based on the information of Transient zero-sequence current and construct membership functions for multi-information fusion to form a comprehensive faulty line selection algorithm combined with hardware platform. Verified by dynamic simulation of neutral grounding in different modes that the device faulty selection results were Valid and reliable .