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:
Oct. 15, 2013
Filed:
Apr. 01, 2009
Kazunobu Oi, Tokyo, JP;
Masakazu Muneshima, Tokyo, JP;
Issei Hirayama, Tokyo, JP;
Meidensha Corporation, Tokyo, JP;
Abstract
A system stabilizing device disposed in a micro grid incorporates a self-supporting control unit (). The self-supporting control unit () allows a dq transforming unit () to determine an effective system voltage Vsd and an ineffective system voltage Vsq from a system voltage Vs. A fluctuation detecting unit () has differential characteristics and first-order lag characteristics, and determines the fluctuation component of the effective system voltage Vsd. This fluctuation component is multiplied by a gain in a proportional computing unit () to determine an ineffective current command I. A fluctuation detecting unit () does not have differential characteristics, but has first-order lag characteristics, and determines the fluctuation component of the ineffective system voltage Vsq. This fluctuation component is multiplied by a gain in a proportional computing unit () to determine an effective current command I. By so doing, hardware and computation load necessary for system stabilizing control during a self-supporting run can be reduced in the system stabilizing device.