Systems and methods for high impedance fault detection in electric distribution systems
US11709194B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2021 |
| Grant date | Jul 25, 2023 |
| Priority date | — |
| Expiry date | Jan 12, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Systems, methods, and computer-readable media are disclosed for high impedance detection in electric distribution systems. An example method may include calculating, by a processor, a relative randomness of a signal, wherein the relative randomness is a derivative of a first scale wavelet transform divided by an energy of the signal. The example method may also include calculating, by the processor, one or more scales of a wavelet transform of the signal. The example method may also include calculating, by the processor, one or more energy ratios between energy of the wavelet transform in the one or more scales. The example method may also include calculating, by the processor, a zero-crossing phase difference between a third harmonic and a fundamental component of the signal. The example method may also include determining, by the processor, that a high impedance fault occurs based on at least one of: the relative randomness, a comparison between the one or more scales of the wavelet transform, and the zero-crossing phase difference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.