The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1998
Filed:
Apr. 01, 1996
Ingvar Hagman, Ludvika, SE;
Asea Brown Boveri AB, Vaster.ang.s, SE;
Abstract
Protective equipment in a bipole converter station of an installation for power transmission by means of a high voltage direct current having main circuits on the dc side of the station. The main circuits have two separate pole parts, one part for each one of the two poles of the station, and a bipole part that is common to both poles. Measuring means in the station form measurement signals which correspond to operating quantities of the station. The measurement signals are supplied to the protective equipment. The protective equipment, dependent on the measurement signals and in their quarters with predetermined algorithm, takes measures to avoid permanent faults by influencing the operation of the station. The protective equipment has a pole protective means for each pole part and a bipole protective means for protection of the bipole part. The bipole protective means has two parts which are independent of each other, each of which is assigned to one of the two pole parts of the station, one to each pole part. The measuring means generates two redundant measuring signals, each of which is supplied to one of the independent parts of the bipole protective means. The bipole protective means that is assigned to a certain pole part only interrupts the operation of that pole part to which it is assigned and not the operation of the other pole part.