Method for fault location analysis of ungrounded distribution systems
US9476931B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2014 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | May 3, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S10/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A location of a fault in an ungrounded power distribution system is determined by identifying a faulty feeder section and a type of the fault using voltages and currents measured before and after the fault and selecting the location of the fault at the faulty feeder section by testing a relationship of a current over a voltage measured at boundaries of the faulty feeder section after the fault with different equivalent admittance matrices of the faulty feeder section determined for different candidate locations of the fault of the determined type. The fault is a short-circuit fault including one or combination of a single-phase-to-ground fault, a phase-to-phase fault, a double-phase-to-ground fault, a three-phase-to-ground fault, and a phase-to-phase-to-phase fault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.