IEEE Draft Recommended Practice for Fault Diagnosis and Protection in Smart Distribution System

This recommended practice provides the fault diagnosis and protection schemes and application cases for smart distribution systems from AC 6 kV to 20 kV, covering security requirements, architectures, and configuration, as well as basic functions and technical indexes of software systems and hardware terminals, and requirements of information exchange. Schemes provided in this document are adaptable to various grid operation modes, control patterns, equipment conditions, and reliability requirements of distribution systems. The fault types involved contain short circuit three-phase, phase-to-phase, single-phase-to-ground, phases-to-ground, and single-phase conductor-broken. Changes and needs brought by the connection of distributed generators are considered. And schemes empowered by information and communication technologies are also introduced.