Single-phase-to-earth fault processing device and method for neutral non-effectively grounded distribution network
US10148080B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 10, 2014 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Aug 27, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A single-phase-to-earth fault processing device for a neutral non-effectively grounded distribution network includes a split-phase arc quenching device connected between earth and a three-phase bus of the distribution network, and a controller with an input end connected with a single-phase-to-earth phase selection device of the distribution network. The split-phase arc quenching device includes a multiphase switching device which operates independently for each phase, and a fuse connected in series with the multiphase switching device. The controller is for controlling opening and closing of three single-phase switches in the multiphase switching device. A single-phase-to-earth fault processing method firstly controls the split-phase arc quenching device to preprocess the fault. If the fault still exists, through a ground resistor a zero-sequence current is generated on a fault line. After delaying to wait for a line to isolate a fault section, a ground connection of the neutral is cut to restore the distribution network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.