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:
Dec. 04, 2012
Filed:
Aug. 04, 2010
Hsiao-dong Chiang, Ithaca, NY (US);
Hua LI, Ithaca, NY (US);
Yasuyuki Tada, Tokyo, JP;
Ryuya Tanabe, Tokyo, JP;
Hsiao-Dong Chiang, Ithaca, NY (US);
Hua Li, Ithaca, NY (US);
Yasuyuki Tada, Tokyo, JP;
Ryuya Tanabe, Tokyo, JP;
The Tokyo Electric Power Company, Incorporated, Tokyo, JP;
BIGWOOD SYSTEMS, Incorporated, Ithaca, NY (US);
Abstract
In the present invention, in a case where a stable equilibrium point calculation is not calculable by using a Newton method, a damping factor of a mechanical system differential equation of a generator is set to be greater than an actual value of the generator of the power system. By applying pseudo-transient simulation to the nonlinear differential algebraic equation of the power system including the mechanical system differential equation of the generator, in which the damping factor is set, a norm of a mechanical system equation is found. If the found norm meets a predetermined condition, variable values of the power system at a time when the norm is found are set as initial values of the nonlinear differential algebraic equation of the power system. A stable equilibrium point is determined by applying the Newton method to the nonlinear differential algebraic equation in which the initial values are set.