Recovery of transmitted power in an installation for transmission of high-voltage direct current
US5701241A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1996 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Oct 9, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/60
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An installation for transmission of high-voltage direct current comprises a converter (SR1) which is controlled by a control unit (CU1). The control unit comprises a quotient-forming member, which forms a current order (IO) for the current (Id) in the dc connection of the installation in dependence on the quotient between a power order (PO) and a calculating value (UDF) of the direct voltage (Ud) at the converter, and a low-pass filter with a bandwidth (1/T1, 1/T2) capable of being controlled, which forms the calculating value as a filtered measured value (UD) of the direct voltage. The control unit comprises a signal-forming member which forms a state signal (FC), indicating that a short-circuit fault has occurred. The state signal influences the bandwidth of the low-pass filter such that the bandwidth is temporarily changed from a smaller value (1/T1) to a larger value (1/T2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.