Method and control system for faulted phase detection
US11022655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2018 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Jun 23, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/385
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method, control system and protective relay are provided for detecting faulted phases of transmission lines in an AC power system. The method includes sampling electric signals at one end of the transmission lines at a series of time points; computing instantaneous voltage values of electric signals at compensated points on the transmission lines from the values of the sampled electric signals based on a time domain lumped parameter differential equation for the transmission lines for the series of time points; recording the computed instantaneous voltage values of the electric signals; computing fault component or sudden-change of the instantaneous voltage values of the electrical signals; detecting the faulted phases or fault types by comparing the calculated fault component of the instantaneous voltage values at the preset compensated points; and generating signals indicating the faulted phases of fault types.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.