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. 27, 2001
Filed:
Jun. 16, 2000
Excitation controller and excitation control method for stabilizing voltage in electric power system
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An excitation controller includes a reactive current detector for detecting a reactive current output from a synchronous machine connected, by way of a tap-changer-equipped transformer including a tap changer for changing taps of the transformer under load conditions, to a transmission system, a tap controller for setting a tap ratio of the tap-changer-equipped transformer according to an output terminal voltage of the synchronous machine, and a voltage setter for setting a reference voltage for an output voltage of the synchronous machine based on a second reference voltage of the tap-changer-equipped transformer at a side connected to the transmission system, the tap ratio set by the tap controller, and the reactive current detected by the reactive current detector. The excitation controller further includes a control unit for controlling an excitation system for exciting the synchronous machine according to the first reference voltage set by the voltage setter.