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.:

US 7840829 B1

PDF
Full Text
Expired
Date of Patent:
Nov. 23, 2010

Filed:

Nov. 22, 2006
Applicants:

Satoshi Mizukami, Hitachi, JP;

Shigeaki Namba, Tokyo, JP;

Inventors:

Satoshi Mizukami, Hitachi, JP;

Shigeaki Namba, Tokyo, JP;

Assignee:

Hitachi, Ltd., Tokyo, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/28 (2006.01);
U.S. Cl.
CPC ...
Abstract

A power supply system is structured, which has a server disposed so that it is capable of communicating through redundant communication media with a user terminal at a user site which is capable of receiving power from one power supply system selected by making a switchover among a plurality of power supply systems; the server collects information about abnormalities caused in the plurality of power supply systems through other redundant communication media from abnormality detectors disposed in a plurality of power generating plants, each of which is part of one of the plurality of power supply systems, and on a plurality of electric transmission/distribution lines, each of which is also part of one of the plurality of power supply systems; the server determines whether the power supply system from which the user is currently receiving power is normal or abnormal; if the power supply system is abnormal, the server sends, to the user terminal, information about normal power supply systems from which the user is able to receive power.


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