Method and apparatus for the protection of DC distribution systems
US9748762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2014 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Jun 16, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
While transient current magnitudes at different locations within a DC distribution system themselves are not a reliable indicator of fault location, it is recognized herein that accumulating energy or pseudo energy values provides a reliable basis for tripping the protection element at a fault location. Thus, in one aspect of the teachings herein, pseudo energy values are accumulated independently during a fault condition, for each of one or more protected branch circuits and the protection element for each such branch circuit is tripped responsive to the accumulated pseudo energy values reaching a defined pseudo energy threshold. The pseudo energy thresholds are defined so that the protection element in the branch circuit where the fault is located will trip first.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.