公开(公告)号：NO20076290A

公开(公告)日：2008-01-22

申请号：NO20076290

申请日：2007-12-06

Applicant: ABB RESEARCH LTD

Inventor： KORBA PETR ,  OUDALOV ALEXANDER ,  LARSSON MATS ,  LINDBERG JOHAN A ,  JOHANSSON STEFAN G

IPC: H02J3/24 ,  H02J3/06

CPC classification number: H02J3/24 ,  H02J3/06 ,  H02J3/1814 ,  Y02E40/18 ,  Y02E60/728 ,  Y04S10/265

公开(公告)号：AT382975T

公开(公告)日：2008-01-15

申请号：AT03405450

申请日：2003-06-21

Applicant: ABB RESEARCH LTD

Inventor： KORBA PETR ,  LARSSON MATS ,  REHTANZ CHRISTIAN

IPC: H02J3/24

Abstract: 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.

公开(公告)号：CA2763497C

公开(公告)日：2016-11-08

申请号：CA2763497

申请日：2009-06-11

Applicant: ABB RESEARCH LTD

Inventor： BERGGREN BERTIL ,  KORBA PETR ,  MAJUMDER RAJAT ,  RAY SWAKSHAR

IPC: H02J3/24

Abstract: The invention provides improved control of a power transmission system having a first group of measurement units (10, 12, 14) in a first geographical area (A_1) providing a first set of phasors and a second group of measurement units (16, 18) in a second geographical area (A_2) providing a second set of phasors, where the phasors in the sets are generated at the same instant in time. In this system the power control device (32) includes a phasor aligning unit (30) that time aligns the first and second sets of phasors and a control unit (33) that compares each set of phasors with a corresponding phasor number threshold, determines that a first control condition is fulfilled if each phasor number threshold has been exceeded and enables the provision of a common signal if the first control condition is fulfilled. The common signal is based on the obtained phasors in the first and second sets.

公开(公告)号：ES2367399T3

公开(公告)日：2011-11-03

申请号：ES07787793

申请日：2007-07-23

Applicant: ABB RESEARCH LTD

Inventor： ZIMA MAREK ,  KORBA PETR ,  LEIRBUKT ALBERT ,  LARSSON MATS

IPC: H02J3/00 ,  H02H6/00

Abstract: Un procedimiento de estimación de unos parámetros de modelo (A, B,...; C1,...) de un modelo térmico de una línea de alta tensión (10), que comprende - medir unos valores de una magnitud eléctrica (I, P) de la línea de alta tensión y de unas magnitudes meteorológicas (Ta, S, W) que representan unas condiciones ambientales de la línea de alta tensión, y - calcular unos valores de los parámetros de modelo a partir de dichos valores medidos, caracterizado porque el procedimiento comprende - medir, repetidamente durante el funcionamiento de la línea de alta tensión, unos valores temporales (I i , Ta i , S i , W i ) de las magnitudes eléctricas y meteorológicas, - medir de forma concurrente un valor temporal (T1 i ) de una temperatura (T1) de la línea de alta tensión, y - calcular, repetidamente durante el funcionamiento de la línea de alta tensión, los valores (A i , B i ;...; C1 i ,...) de los parámetros de modelo a partir de dichos valores medidos.

公开(公告)号：SI2050176T1

公开(公告)日：2011-10-28

申请号：SI200730722

申请日：2007-07-23

Applicant: ABB RESEARCH LTD

Inventor： ZIMA MAREK ,  KORBA PETR ,  LEIRBUKT ALBERT ,  LARSSON MATS

IPC: H02J3/00 ,  H02H6/00

公开(公告)号：DE602006011492D1

公开(公告)日：2010-02-11

申请号：DE602006011492

申请日：2006-10-31

Applicant: ABB RESEARCH LTD

Inventor： KORBA PETR ,  ZIMA MAREK ,  LARSSON MATS

IPC: G05B17/02 ,  H02J3/24

Abstract: The present invention is concerned with the monitoring of electromechanical oscillations in electric power systems, and their identification by an adaptive algorithm based on a repeatedly measured and evaluated signal as detailed in EP-A 1 489 714. In order for an estimation of parameters of a model of the power system to reasonably converge, proper initialisation of the recursive calculation is required, including the definition of tuning parameters constraining the model and the calculation. Initialisation for a second signal to be exploited can then be simplified by copying the set of tuning parameters tuned previously for a different signal. A conditioning gain multiplying the second signal establishes compatibility between the different signals, and a signal pre-filter in turn discards contributions beyond a frequency band comprising typical electromagnetic oscillations.

公开(公告)号：DE602007002809D1

公开(公告)日：2009-11-26

申请号：DE602007002809

申请日：2007-05-16

Applicant: ABB RESEARCH LTD

Inventor： KORBA PETR ,  BACCHINI GINO ,  BULATY PAVEL ,  SCHOLTZ ERNST

IPC: H02H3/40 ,  H02J3/24

Abstract: The present invention is concerned with a faster response and an increased accuracy in power system protection. According to the invention, a fault, instability or other contingency potentially requiring some protective action, such as line tripping or load adaptation, is detected in a fast and precise way by tracking a non-frequency-selective evolution of a physical parameter (R, L) in time domain, preferably with adaptive filters. By reverting to a physical parameter having an imminent physical significance, no additional analysis is required to divulge a fault or contingency, hence the speed of fault detection increases. Due to the skin affect in electrical conductors, a time domain analysis covering a broad range of frequencies includes more information than an analysis confined to the fundamental or line frequency, hence the accuracy of the fault detection increases.

公开(公告)号：AT445926T

公开(公告)日：2009-10-15

申请号：AT07729237

申请日：2007-05-16

Applicant: ABB RESEARCH LTD

Inventor： KORBA PETR ,  BACCHINI GINO ,  BULATY PAVEL ,  SCHOLTZ ERNST

IPC: H02H3/40 ,  H02J3/24

Abstract: The present invention is concerned with a faster response and an increased accuracy in power system protection. According to the invention, a fault, instability or other contingency potentially requiring some protective action, such as line tripping or load adaptation, is detected in a fast and precise way by tracking a non-frequency-selective evolution of a physical parameter (R, L) in time domain, preferably with adaptive filters. By reverting to a physical parameter having an imminent physical significance, no additional analysis is required to divulge a fault or contingency, hence the speed of fault detection increases. Due to the skin affect in electrical conductors, a time domain analysis covering a broad range of frequencies includes more information than an analysis confined to the fundamental or line frequency, hence the accuracy of the fault detection increases.

公开(公告)号：DE60318408T2

公开(公告)日：2009-01-29

申请号：DE60318408

申请日：2003-06-21

Applicant: ABB RESEARCH LTD

Inventor： KORBA PETR ,  LARSSON MATS ,  REHTANZ CHRISTIAN

IPC: H02J3/24

Abstract: 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.

公开(公告)号：DE60318408D1

公开(公告)日：2008-02-14

申请号：DE60318408

申请日：2003-06-21

Applicant: ABB RESEARCH LTD

Inventor： KORBA PETR ,  LARSSON MATS ,  REHTANZ CHRISTIAN

IPC: H02J3/24

Abstract: 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.