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1.发明授权公开(公告)号：US09793713B2
公开(公告)日：2017-10-17
申请号：US14649532
申请日：2014-03-28
发明人： Ningbo Wang , Chongru Liu , Long Zhao , Yi Ding , Zhongyi Liu , Yanhong Ma , Dan Wang , Dan Jin , Wenying Liu , Shiyuan Zhou , Kun Ding , Qiang Zhou , Jin Li
摘要： 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.
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