Single phase line‐broken fault detection and location based on differential voltage in radial distribution network

Single phase line-broken (SPLB) fault is one kind of high impedance (HIF). When a SPLB occurs, there are four scenarios: with neither side conductors grounded (SPLB-NSCG), source conductor only (SPLB-SSCG), load (SPLB-LSCG), both (SPLB-BSCG). Traditional HIF detection methods using current or voltage characteristics have low sensitivity to fault. In this paper, analysed firstly in the cases first three scenarios fault, respectively. Theoretical analysis finds that at sides disconnection point significantly different. A sensitive method based on differential proposed for radial distribution network different data synchronization ability. Finally, location centralized intelligent mode feeder automation (FA) and distributed FA proposed. Simulations PSCAD verify feasible, highly immune neutral mode, resistance.