Keyword: «higher harmonics»

То the question of clarifying the methodology for calculating the losses of electrical energy in electrical networks with non-linear electrical receivers

Author:

Aleksei Vasilev

The article presents the results of experimental studies to determine the time of use of the maximum load and the time of greatest losses for the most significant harmonics of the current by seasons. The measurements were performed on low-voltage inputs of 10/0.4 kV power transformers that supply mainly utility networks with a voltage of 0.38 kV. To obtain reliable results, 37 head sections of 0.38 kV networks were examined.

Keywords: electrical networks, higher harmonics, additional losses of electrical energy

Development of a model of an electrical receiving device for a 0.22 kV load node

Authors:

Olga Zabrodina,

Ivan Panchenko,

Uliya Procenko

The article discusses issues related to the development of a model of an electrical receiving device of a 0.22 kV load node in the form of a replacement circuit represented by a linear part and a set of current sources of various frequencies, the parameters of which are described by statistical estimates obtained by the method of parametric identification. A computer has been selected as an electrical receiving device. The simulation results are presented. The resulting model can be used to create a computer model of a 0.22 kV load node.

Keywords: parameters, higher harmonics, calculation algorithm, load node, electrical network, receiver model, substitution scheme