Abb Research Ltd.

Abb Technology Ag

Mettler-toledo Ag

Christoph Heitz

Marco Piemontesi

Martin Tiberg

Bjorn Gustavsen

Gerhard Salge

Lutz Niemeyer

Diego Sologuren-Sanchez

Thomas Hütter

Kaveh Niayesh

Andreas Dahlquist

Jürgen Schawe

Matthias Berth

Herbert Meinecke

A method and device characterize linear properties of an electrical component having n&#x3e;1 ports. The linear properties of the component are described in a matrix relating a voltage applied to the ports to a current through the ports. A frequency dependence of the matrix is approximated to preserve eigenvalues of the matrix by a pole-residual model. The method includes: (a) obtaining a set of values of the matrix at discrete frequencies, and obtaining eigenvalues and eigenvectors for each value; (b) fitting a set of vector equations to the eigenvalues and eigenvectors with a first set of pole frequencies; and (c) calculating a second set of pole frequencies by a vector fitting process for all modes of an element of the matrix. Steps (b) and (c) are repeated using the second set of pole frequencies in step (c) in a subsequent step (b) until a stop condition is met.

Iterative method for characterizing the frequency dependence of the linear properties of an electrical component

A method and device for determining the linear response of an electrical multi-port component 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.

Method and device for characterizing the linear properties of an electrical component

Residue perturbation is used for enforcing passivity of a linear response model of an electrical component having n&#x3e;1 ports. According to an exemplary embodiment, a modal perturbation approach can be used, which allows weighted perturbation of the individual modes by the inverse of the corresponding eigenvalues. This provides superior results if the admittance or impedance matrix of the device has a large eigenvalue spread.

Passivity enforcement by modal perturbation

Some of the embodiments of the present disclosure provide a method for analyzing a substance, where the method includes subjecting the substance to a dynamic excitation to produce an observable response, and determining a characteristic quantity of the substance based on a correlation between the excitation and the response. The correlation between the excitation and the response is expressed by a parametric model for which a specific model structure with a finite number of unspecified parameters is preset. The determining a characteristic quantity of the substance includes calculating the parameters of the model from values of the excitation and the response in a time domain, determining from the calculated parameters a transfer function in a frequency range, and calculating the characteristic quantity directly from the transfer function. Other embodiments are also described and claimed.

Method and device for analyzing substances

Substance analysis based upon observed reponse to excitation described herein. When a substance is subjected to an excitation and a response is observed, a relational evaluation is made based on the concept that the parameters of a mathematical model may be determined, which emulate the relationship between the excitation and the response, and that characteristic substance properties are subsequently determined/calculated from the time series of estimated values of the mathematical model.

Method and device for a thermoanalytical material analysis

Support insulator

The invention relates to a post insulator ( ) whose surface ( ) is geometrically configured, in at least one area ( ) between an inner conductor ( ) and encapsulation ( ) for a gas-insulated switchgear assembly ( ) such that surface discharge paths ( ) are provided between the inner conductor ( ) and the encapsulation ( ) and have a subsection in the opposite direction to the bridging direction ( ). In consequence, surface discharges ( ) can be diverted in the opposite direction to an original propagation direction ( ), and come to rest by self-blocking. Exemplary embodiments relate to: an indentation ( ) which is concave and is open toward the inner conductor ( ) and/or toward the encapsulation ( ) and is formed between a cup shaped barrier ( ) and the base body ( ) of the post insulator ( ); diversion of surface discharges ( ) through up to 180&deg; for efficient self blocking; and adhesive bonding ( ) of the barrier ( ) on a conventional post insulator ( ). The invention also relates to a gas-insulated switchgear assembly ( ) or to a switchgear assembly module having such a post insulator ( ) or partition insulator ( ).

GIS post insulator with an integrated barrier

Disconnector

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Elgg/ZH, Switzerland

Christoph Heitz