Fault detection and direction determination
US10247767B2 · kind B2 · utility
1Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2015 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | Sep 19, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/385
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for fault detection and direction determination with a phase overcurrent relay using individual phase torques and the negative sequence torque, and with a ground overcurrent relay using the zero sequence torque. A directional element includes a ground element logic circuit, a negative element logic circuit and a phase element logic circuit to evaluate the operation state of the system, detect a fault condition and determine the direction of the fault condition in an electrical power distribution system having multiple sources on a power grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.