发明名称 |
Detecting electromechanical oscillations in power systems |
摘要 |
The detection of electromechanical oscillations in power systems and the estimation of their parameters (frequency f and damping xi ) is based on a linear time-varying model. The parameters of the linear model are on-line adapted by means of Kalman filtering techniques to approximate the measured signal y (representing the behaviour of the power system) optimally in the sense of a quadratic criterion. The estimated model parameters are then the basis for the calculation of parameters of the oscillations. Adaptive algorithms are based on a recursive calculation of the estimated parameter vector for each time-step based on the new value of the measured signal and the old values of the estimated parameters. As opposed to the collection of data over a time window and then performing the parameter identification at once, any change in the system can thus be detected much faster. <IMAGE>
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申请公布号 |
EP1489714(A1) |
申请公布日期 |
2004.12.22 |
申请号 |
EP20030405450 |
申请日期 |
2003.06.21 |
申请人 |
ABB RESEARCH LTD. |
发明人 |
KORBA, PETR;LARSSON, MATS;REHTANZ, CHRISTIAN |
分类号 |
H02J3/24;(IPC1-7):H02J3/24 |
主分类号 |
H02J3/24 |
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