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. 17, 2017
Filed:
Mar. 28, 2014
Gansu Electric Power Corporation Wind Power Technology Center, Lanzhou, Gansu Province, CN;
Ningbo Wang, Lanzhou, CN;
Chongru Liu, Lanzhou, CN;
Long Zhao, Lanzhou, CN;
Yi Ding, Lanzhou, CN;
Zhongyi Liu, Lanzhou, CN;
Yanhong Ma, Lanzhou, CN;
Dan Wang, Lanzhou, CN;
Dan Jin, Lanzhou, CN;
Wenying Liu, Lanzhou, CN;
Shiyuan Zhou, Lanzhou, CN;
Kun Ding, Lanzhou, CN;
Qiang Zhou, Lanzhou, CN;
Jin Li, Lanzhou, CN;
Abstract
A method for improving system small disturbance stability after double-fed unit gets access to the system belongs to the field of electric power system operation and control technology. A sensitivity analysis is adopted to optimize parameter, through making sensitivity analysis on the non-ideal dominant mode happens to the system to find out several nonzero elements that are most sensitive to this mode in system matrix; elements of state matrix is adopted to replace the elements of system matrix to make analysis so as to find out the most relevant parameter set; setting parameters change in the interval to observe track for the change of eigenvalues of corresponding mode and then balancing and optimizing system parameters comprehensively according to the change of eigenvalues. Without adding other control means, the present invention can improve dominant modal damping caused by selecting improper controller parameters or system parameters after double-fed unit gets access to the system without increasing cost; as this method is also highly targeted, exhaustive efforts for all the adjustable parameters of the system can be avoided, which not only greatly decreases workload, but also improves computational efficiency, so that it is very instructive.