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:
Jun. 11, 2002
Filed:
Jul. 11, 2001
Tomas Jonsson, Vasteras, SE;
Lennart Angquist, Enkoping, SE;
ABB AB, Vasteras, SE;
Abstract
Thyristor-controlled series capacitor equipment (CEQ), intended for connection between an ac network (NET) and a converter (CONV), connected thereto, for conversion between alternating current ((IT) and high-voltage direct current (Id), with a controllable semiconductor valve (TYSW), has control equipment with control means ( ) which, in dependence on a synchronization signal (&PHgr; ), form firing pulses (TP TP ) for control of the semiconductor valve. The converter has a control device (CTR ) which forms a control-angle order (&agr;-ORD) for phase-angle control of the converter, related to the phase position for a voltage (U ) at a chosen connection point (J ). The control equipment (CTREQ) comprises phase-correcting means ( S ) which form the synchronization signal in dependence on a voltage-phase signal (&PHgr; )) supplied thereto and containing information about the phase position of said voltage, and on a control-angle signal (&agr;) supplied thereto and containing information about the control angle of the converter.