公开(公告)号：BRPI0606482A2

公开(公告)日：2009-06-30

申请号：BRPI0606482

申请日：2006-01-17

Applicant: ABB RESEARCH LTD

Inventor： NIAYESH KAVEH ,  BERTH MATTHIAS ,  DAHLQUIST ANDREAS ,  HEITZ CHRISTOPH ,  TIBERG MARTIN

IPC: G01R27/28

Abstract: A method and device for determining the linear response of an electrical multi-port component (1) has an "estimation procedure" in which an estimated admittance matrix is determined by applying voltages to the ports of the component and measuring the response of the component. The estimation procedure can e.g. consist of a conventional measurement of the admittance matrix. The method further has a "measurement procedure" in which several voltage patterns are applied to the port. The voltage patterns correspond to the eigenvectors of the estimated admittance matrix. For each applied voltage pattern, the response of the component is measured. This allows to measure the linear response of the component accurately even if the eigenvalues of the admittance matrix differ by several orders of magnitude.

公开(公告)号：AT352851T

公开(公告)日：2007-02-15

申请号：AT03405906

申请日：2003-12-18

Applicant: ABB RESEARCH LTD

Inventor： NIAYESH KAVEH ,  NIEMEYER LUTZ ,  BACKMAN MAGNUS ,  PAUL WILLI ,  SALGE GERHARD

IPC: H01H3/30

公开(公告)号：PL1644951T3

公开(公告)日：2008-02-29

申请号：PL04738057

申请日：2004-07-01

Applicant: ABB RESEARCH LTD

Inventor： NIAYESH KAVEH ,  KOENIG FRIEDRICH

IPC: H01H77/10 ,  H01H29/00 ,  H01H29/22 ,  H01H53/08

公开(公告)号：DE502004005029D1

公开(公告)日：2007-10-31

申请号：DE502004005029

申请日：2004-07-01

Applicant: ABB RESEARCH LTD

Inventor： NIAYESH KAVEH ,  KOENIG FRIEDRICH

IPC: H01H77/10 ,  H01H29/00 ,  H01H29/22 ,  H01H53/08

Abstract: A method and an apparatus are disclosed for current limiting, as is a switchgear assembly having an apparatus such as this. Liquid metal is passed along a resistance element for the current limiting path, in order to achieve current limiting without any arcs for network-dependent short-circuit currents. Exemplary embodiments relate, inter alia, to: an electrical resistance, which rises non-linearly in the movement direction of the liquid metal for a soft current limiting characteristic, a resistance element in the form of a dielectric matrix having channels for the liquid metal, and a combined current limiter circuit breaker. Advantages are, inter alia, reversible current limiting and possibly current disconnection without arcs, also suitable for high voltages and currents, fast reaction times, low wear, and maintenance-friendliness.

公开(公告)号：NO20074246L

公开(公告)日：2007-10-22

申请号：NO20074246

申请日：2007-08-20

Applicant: ABB RESEARCH LTD

Inventor： NIAYESH KAVEH ,  BERTH MATTHIAS ,  DAHLQUIST ANDREAS ,  HEITZ CHRISTOPH ,  TIBERG MARTIN

IPC: G01R27/28

Abstract: A method and device for determining the linear response of an electrical multi-port component (1) has an "estimation procedure" in which an estimated admittance matrix is determined by applying voltages to the ports of the component and measuring the response of the component. The estimation procedure can e.g. consist of a conventional measurement of the admittance matrix. The method further has a "measurement procedure" in which several voltage patterns are applied to the port. The voltage patterns correspond to the eigenvectors of the estimated admittance matrix. For each applied voltage pattern, the response of the component is measured. This allows to measure the linear response of the component accurately even if the eigenvalues of the admittance matrix differ by several orders of magnitude.