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:
Jul. 12, 1994
Filed:
Aug. 12, 1992
Colin D Schauder, Murrysville, PA (US);
Electric Power Research Institute, Palo Alto, CA (US);
Abstract
An advanced static VAR (volt ampere reactive) compensator (ASVC) system for coupling with and compensating a transmission line of a power system includes an ASVC controller. A voltage-sourced inverter has an AC side coupled through a series inductance to the transmission line, and a DC side coupled to a capacitor. By monitoring the DC side voltage, two line-to-line voltages and two line currents between the series inductance and the transmission lines, the ASVC controller determines an instantaneous reactive current component of the line current. The ASVC controller adjusts the phase angle of the inverter AC output voltages to compensates the transmission line by negating the instantaneous reactive current, and thus, the undesirable instantaneous reactive power on the transmission line. A method is also disclosed of compensating the instantaneous reactive power flowing over the transmission line.