Differential protection method for bridge circuit in current converter control system
US9667131B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 22, 2016 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Mar 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/155
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a differential protection method for bridge circuit in current converter control system, including the steps of: 1). obtaining sample values of the three-phase current for the current converter control system at AC side thereof, and calculating the absolute value of each sampling value respectively; 2). calculating a value of current at the AC side of the current converter control system; and 3). determining whether to perform a relay protection for the current converter control system according to the value current at the AC side of the current converter control system. The method of the present invention provided, is fast, convenient, and with a small amount of calculation. The current converter control system determines whether to perform a relay protection in a short time. Also it reduces the possibility that the equipment burned because of cannot break the circuit in time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.