An assessment of the share contributions of distortion sources for various load parameters

Abstract

The method for assessing the contributions of distortion sources based on measuring consumer currents and calculating their projections onto the supply current vector is considered in the paper. Determination of contributions is carried out on the basis of the developed model of an industrial enterprise in the food industry in MATLAB Simulink software. This study presents various cases of simulation, including variable parameters of linear and non-linear consumer load, changes in parameters of external distortion sources and passive harmonic filters. It is shown that the considered method gives correct results in the absence of external distortions in the electrical grid. The considered criteria for the share contributions make it possible to estimate the most efficient place for installing a passive filter in the absence of external distortions. An indicator for evaluating external distortions has also been developed based on calculating the projection of the harmonic system current onto the harmonic current of the shunt filter at the considered frequency.

Analysis of the behavior of asynchronous electric drive with a closed scalar control system when changing the inductance of the magnetizing circuit

“…Magnetization circuit mutual inductance variation in the range of 0.7-1.1-Lm is associated with interturn short currents in the frontal parts of the stator winding (Skamyin et al, 2022;Pedra et al, 2018). During the experiments, an interturn short current was created in one of the stator phases of an electric motor (Tables 3 and 4) having the winding stacking scheme shown in Figure 3a.…”

Induction Motor Bearing Fault Diagnosis Based on Singular Value Decomposition of the Stator Current

“…Therefore, in our case, the voltage signals are not of interest (Figure 4). However, in the case of a real process, the voltages may contain distortions that are determined by the presence of a non-linear and abruptly variable load on the common power bus [80]. In this case, the voltage time series should be used to find these distortions and to exclude their influence on the fault detection result, and subsequent studies can focus on this.…”