Method for preventing differential protection maloperation of optical fiber caused by saturation of single CT of 3/2 connection
US10622804B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Nov 15, 2016 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Apr 17, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/283
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to a method for preventing a maloperation of differential protection of an optical fiber caused by saturation of a single Current Transformer (CT) of 3/2 connection. By applying a combination of the differential judgment and the sub-CT current judgment, reliable identification of internal and external faults is ensured, and the problem of misjudging of the internal fault as the external fault can be prevented as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.