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:
Mar. 06, 2001
Filed:
Dec. 08, 1999
Urban Åström, Saxdalen, SE;
Bruno Halvarsson, Ludvika, SE;
Lars Hermansson, Västerås, SE;
ABB AB, , SE;
Abstract
In a plant for transmitting electric power between two stations (,) through a direct voltage network (,) for High Voltage Direct Current an arrangement (,) is arranged for draining electric power from the direct voltage network. The arrangement has a valve (,) made of bidirectionally controlled thyristors (BCT) with ability to conduct current in both directions therethrough. The plant has also a unit (,) adapted to control the thyristors of the valve so that the current direction between the direct voltage network and the valve is such that electric power is fed from the direct voltage network to an alternating voltage network- connected to the valve independently of the power feeding direction between said two stations (,).