Patent · US Expired

Device for supervising a high voltage converter station

US6205039A · kind A · utility

5Cited by

7References

7Claims

0Family size

Assignee

ABB AB · SE

Inventors

Urban Astrom · Saxdalen, SE
Hans Björklund · Ludvika, SE
Krister Nyberg · Smedjebacken, SE
Roland Siljeström · Skultuna, SE
Gunnar Asplund · Solna, SE

Key dates

Filing date	Dec 9, 1999
Grant date	Mar 20, 2001
Priority date	—
Expiry date	Dec 9, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A device in a valve on high voltage potential level and in a high voltage converter station comprises members arranged on high voltage level and adapted to detect parameters of a voltage divider circuit consisting of resistances (24, 25) and capacitors (27, 28) connected in series and across each thyristor of said valve. The capacitors are of self-healing type, in which from the point of time for occurring of a possible fault thereof the capacitance is gradually reduced, and said members are adapted to carry out measurements so as to determine whether the capacitance of the capacitors is changed over the time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.