Faulty Line-Section Identification Method for Distribution Systems Based on Fault Indicators

This paper proposes a fault identification method that is embedded in an asset management system that integrates data from fault indicators, a distribution dispatching control system (DDCS), and a feeder dispatching control system (FDCS). The fault identification model, based on Petri-net technology, is developed using an automated mapping/facilities management/geographic information system (AM/FM/GIS). The proposed method uses data that include the statuses of fault indicators and circuit breakers, the available pre-current and post-current measurements of FIs, and the loadings of a feeder and a lateral. Communications capabilities are added to these fault indicators to develop a centralized asset management system that can dispatch crews to fault locations faster, accelerating restoration. A distribution feeder of Taiwan Power Company (Taipower) was simulated. Simulation results from the test case reveal the effectiveness of the use of communication-capable fault indicators for managing the assets in a distribution system as part of the proposed method.