Direct current switch-off device and control method thereof
US10418803B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 17, 2017 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Apr 17, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2009/544
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct current switch-off device comprises an on-state current branch circuit and a current commutating and breaking unit which are connected in parallel. The on-state current branch circuit has a mechanical switch (S) and a current transfer module which are connected in series. The current commutating and breaking unit comprises a bridge-type branch circuit and a current-breaking branch circuit. The current-breaking branch circuit and two bridge arms of the bridge-type branch circuit are connected in parallel. The current-breaking branch circuit comprises a nonlinear resistor (RI) and a valve group consisting of fully-controlled devices connected in series. The nonlinear resistor (RI) and the valve group are connected in parallel. Two ends of each fully-controlled device in the valve group are connected in parallel with a buffering and reclosing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.