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:
Nov. 01, 2011
Filed:
Mar. 18, 2009
Beat Ronner, Maisprach, CH;
Osvin Gaupp, Baden, CH;
Beat Ronner, Maisprach, CH;
Osvin Gaupp, Baden, CH;
ABB Schweiz AG, Baden, CH;
Abstract
The disclosure specifies a method for operating a converter circuit, the converter circuit having a converter unit with a large number of drivable power semiconductor switches and with a three-phase electrical AC voltage system, in which the drivable power semiconductor switches are driven by means of a drive signal (S) formed from a control signal ((S), and the control signal (S) is formed by adjusting an H-th harmonic component of system currents (i) to a system current setpoint value (i), where H=1, 2, 3, . . . . In order to reduce a harmonic component in the system voltages, the system current setpoint value (i) is formed by adjusting an H-th harmonic component of system voltages (u) to a predeterminable system voltage setpoint value (u), the control difference (u) from the H-th harmonic component of the system voltages (u) and the system voltage setpoint value (u) being weighted by a system impedance (y) determined with respect to the H-th harmonic component. In addition, an apparatus is disclosed for implementing the method.