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Bjørn Gustavsen

Sjefforsker

Bjørn Gustavsen

Sjefforsker

Bjørn Gustavsen
Telefon: 416 07 485
Mobil: 416 07 485
Avdeling: Energisystemer
Kontorsted: Trondheim

Publikasjoner og ansvarsområder

Publikasjoner

Publikasjon

Wideband Transformer Modeling Including Core Nonlinear Effects

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1304044

Wide-band, black-box transformer models can be obtained via frequency sweep measurements on transformer terminals followed by rational model extraction via passive curve fitting. These models do however not include core non-linearity effects. A modeling approach is introduced where a wide-band linea...

Forfattere Gustavsen Bjørn
År 2016
Type Tidsskriftsartikkel
Publikasjon

Parameterized Macromodeling for Efficient Analysis of Wideband Tower Grounding Structures

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1369235

Field solvers are often needed to properly characterize the behavior of grounding structures in a wide frequency range. These solvers provide accurate results but at high computational cost. Design tasks, such as design optimization and sensitivity analysis, require repeated simulations for differen...

Forfattere Ferranti Francesco Gustavsen Bjørn Holdyk Andrzej
År 2016
Type Tidsskriftsartikkel
Publikasjon

Computational efficiency improvement of the Universal Line Model by use of rational approximations with real poles

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1364886

The Universal Line Model (ULM) is widely used for the simulation of electromagnetic transients in electrical power transmission systems. This paper proposes an improvement in the computational efficiency of the ULM by introducing a methodology for rational approximation of smooth frequency domain re...

Forfattere Bañuelos-Cabral Eduardo Salvador Gustavsen Bjørn Gutiérrez-Robles José Alberto Hoidalen Hans Kristian Naredo José Luis
År 2016
Type Tidsskriftsartikkel
Publikasjon

Wideband modeling of a 45-MVA generator step-up transformer for network interaction studies

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1385542

A stable and passive six-terminal model is developed for a 45-MVA generator step-up transformer based on frequency sweep measurements in the range 5 Hz–10 MHz and curve fitting with rational functions. The modeling employs separate treatment of the zero sequence system in combination with a new vari...

Forfattere Gustavsen Bjørn Tandstad Bjørn
År 2016
Type Tidsskriftsartikkel
Publikasjon

Eliminating Measurement Cable Effects From Transformer Admittance Measurements

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1369233

Admittance frequency-sweep measurements is an accepted procedure for characterizing transformer terminal behavior for the purpose of frequency-dependent black-box modeling. The errors introduced by the measurement cables is with one existing practice mitigated by removal of the associated shunt capa...

Forfattere Gustavsen Bjørn
År 2016
Type Tidsskriftsartikkel
Publikasjon

Inclusion of Wire Twisting Effects in Cable Impedance Calculations

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1410311

Cable-series impedance modeling is widely applied in electromagnetic transients simulations and power-loss calculations. The calculations are usually performed in a 2-D frame using the finite-element method or alternative approaches, such as MoM-SO, thereby losing the 3-D effects imposed by twisting...

Forfattere Gustavsen Bjørn Høyer-Hansen Martin Triverio Piero Patel Utkarsh R.
År 2016
Type Tidsskriftsartikkel
Publikasjon

Black-box macromodeling and its EMC applications

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1425783

The main idea of black-box macromodeling is to approximate the dynamic behavior of complex systems in terms of lowcomplexity models or equivalent circuits. Such compact models can be derived through robust numerical algorithms, such as the Vector Fitting scheme, starting from frequency-or time-domai...

Forfattere Grivet-Talocia Stefano Gustavsen Bjørn
År 2016
Type Tidsskriftsartikkel
Publikasjon

Apparent impedance analysis: A new method for power system stability analysis

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1391548

In this paper a new method for power system stability analysis is introduced. The method is based on injection of a small voltage or current in an arbitrary point of the system. The apparent impedance is defined as the ratio between the voltage and current in the injection point. It is shown that th...

Forfattere Rygg Atle Amin Mohammad Molinas Cabrera Maria Marta Gustavsen Bjørn
År 2016
Type Konferanseartikkel/Bokkapittel
Publikasjon

Optimal Time Delay Extraction for Transmission Line Modeling

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1398752

Frequency-dependent transmission line modeling by the traveling wave method requires to approximate the propagation function with a delayed rational function. Some approaches are based on modal decomposition where scalar functions are fitted with a rational model plus a single time delay. The delay ...

Forfattere Gustavsen Bjørn
År 2016
Type Tidsskriftsartikkel
Publikasjon

Variable Transmission Voltage for Loss Minimization in Long Offshore Wind Farm AC Export Cables

http://www.sintef.no/publikasjoner/publikasjon/?pubid=CRIStin+1446425

Connection of offshore wind farms to shore requires the use of submarine cables. In the case of long HVAC connections, the capacitive charging currents limit the transfer capability and lead to high losses. This paper shows that the losses can be substantially reduced by continuously adjusting the c...

Forfattere Gustavsen Bjørn Mo Olve
År 2016
Type Tidsskriftsartikkel
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