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:
Jun. 22, 2010
Filed:
Oct. 25, 2007
Shigetoo Oda, Tokyo, JP;
Shigetoo Oda, Tokyo, JP;
Mitsubishi Electric Corporation, Chiyoda-Ku, Tokyo, JP;
Abstract
A sampling frequency control method includes a difference calculating step STof calculating the difference between sampled values obtained through sampling of an AC quantity of electricity of a power system at time points that are separated by a prescribed time period of the AC quantity of electricity; an effective value calculating step STof calculating an effective value of the AC quantity of electricity and an effective value of the difference; a ratio calculating step STof calculating the ratio K of the effective value of the difference to the effective value of the AC quantity of electricity; and a control step of controlling the sampling frequency by controlling the sampling period on the basis of the calculated ratio K so that it follows the frequency of the AC quantity of electricity.