Power line fault detector and analyzer
US6798211B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1998 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Dec 8, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fault distance indicator (FDI), locates a fault in a power line by modeling pulses of reflected travelling wave signals which are generated from electrical arcs that occur as a result of the fault. Open loop power distribution circuits are arranged in two halves, each half comprising a circuit length from the overhead feed point to an open point with transformers and cable sections located along the circuit length. An FDI is inserted in each half of the loop. The FDI device monitors the circuit using an antenna which receives radio-frequency signals emitted by line faults and records the signatures of these faults. When the “trouble crew” arrives at the scene the recorded signature is downloaded to a portable PC via a radio, infra-red or other telemetry link. The downloaded data is analyzed first to generate a model of the reflected travelling wave signal and then parameters of the model are adjusted to minimize differences between the model and the actual data. The result is an approximate response characteristic of the faulted power line with arcs generated in the fault condition being modeled as an impulse. Parameters derived from this response characteristic direc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.