Fault wave arrival determination
US8598887B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 13, 2010 |
| Grant date | Dec 3, 2013 |
| Priority date | — |
| Expiry date | Apr 13, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining the time of arrival of a fault wave at a measurement point of a power transmission system includes a measurement unit measuring a power quantity of the system at the measurement point (P1) for obtaining a measurement quantity being a potential fault wave, a time keeping unit, a storage unit storing the measurement quantity, a comparing unit comparing the measurement quantity with a threshold (T1) for detecting the presence of a fault wave (W1) and an analyzing unit. The analyzing unit analyzes measurements made before the fault wave presence was detected, determines the starting point (SP) of the fault wave based on the analysis and sets the time of the starting point to be the fault wave arrival time (T1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.