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. 26, 2012
Filed:
Dec. 10, 2007
Junichi Shimomura, Tokyo, JP;
Satoru Ohishi, Yamato, JP;
Kenichi Suzuki, Sagamihara, JP;
Meidensha Corporation, Tokyo, JP;
The Tokyo Electric Power Company, Incorporated, Tokyo, JP;
Abstract
[Task] In a power conversion system, a variation in PCS alternating current voltage is suppressed during a change operation to a self-contained run according to an instantaneous voltage drop-service interruption. [Means for solving the task] During an ordinary system voltage stabilization, with change switchchanged to the output side of APR control circuitand change switchchanged to the output side of charge/discharge run PWM command value preparing section, the power conversion system is run in a charge/discharge run mode. If the instantaneous voltage drop or the service interruption occurs, change switchis changed to the output side of the self-contained run change prior current command value preparing sectionand the constant current discharge run is carried out in which the electric power is discharged for a predetermined time duration in response to the current command value of the self-contained run change prior current command value preparing section. Thus, after a predetermined time has elapsed, change switchis changed to the output side of the self-contained run PWM command value preparing sectionto perform the self-contained run. At this time, the variation in PCS alternating current voltage in the power conversion system is suppressed.