A method is introduced for impedance and loss calculation of three-core power cables with steel armoring, based on 2D finite element method (FEM) computations. The pitching effect of the cores and armor wires is taken into ...

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 ...

Variable speed drives (VSDs) cause motor overvoltage stresses to result from fast-front voltage waveforms emerging from the converter, in particular when filters are not installed at the converter output terminals. This ...

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 ...

The authors present a methodology to improve the rational modelling of non-uniform lines (NuLs). First, they formulate a segmented chain matrix representation of the NuL, which is converted into a nodal admittance formulation ...

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 ...

The so-called non-linear vector fitting (NL-VF) technique was recently introduced as a new method for rational function approximation in the frequency domain (FD). While the classical vector fitting (VF) fits a rational ...

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 ...

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 ...