2nd International Symposium on Energy Challenges and Mechanics issue:2
International Symposium on Energy Challenges and Mechanics edition:2 location:Aberdeen (Scotland) date:19-21 August 2014
The concept of Fault Passage Indicator (FPI) is nearly 70 years old. Its main functionality is to indicate the flow of a faulty current through a cable section. Despite the simplicity of the concept, it has proven to be an effective solution to ease the task of locating a fault. In this long period, the manufacturers have come up with new ideas to improve the FPI and to provide a satisfactory answer to the needs of the Distribution Network Operators (DNO). The ultimate goal is to reduce the outage time and the consequent losses, aiming to increase the reliability of the grid.
FPIs are devices that combine features from different fields and, therefore, they can be approached from different perspectives: (directional) fault detection algorithms, faulted phase detection, (auto) configuration of detection parameters, number of sensors and sensor technology, the optimal placement of the FPIs in the grid, the mechanical installation of the device, the acquisition of the indication, the reset of the device, amongst some more.
Several improvements have taken place in the last years regarding the above-mentioned fields: directional FPIs without voltage sensors, FPIs that can be installed far from the conductor (contactless), use of FPIs for grid monitoring purposes, and some more. Moreover, the FPI is a scalable device that must combine fault detection capabilities with a low cost, while providing high accuracy and coordination with the feeder circuit breaker operation.
The paper will analyze the improvements and limitations above mentioned that challenge the further development of this mature technology.