Current limiting device, current limiter and current limiting system for power grid
US9640984B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 9, 2013 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Feb 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A current limiting device for a power grid includes a first current limiting reactor; a first smart fast switch connected with the first current limiting reactor in parallel; a current transformer sleeved on a bus bar located on one side of a circuit resulting from the parallel connection of the first current limiting reactor with the first smart fast switch to monitor the current in the bus bar in real time; and a controller connected with the current transformer to control the switch-off of the first smart fast switch when the current in the bus bar is higher than a first preset value and the switch-on of the first smart fast switch when the current in the bus bar is smaller than a second preset value, wherein the first preset value is higher than the second preset value. The current limiting device improves the operational reliability of a power grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.