Keyword: «load node»

With the development of power systems, their operating conditions become more complicated, as a result of which even small deviations in the operating parameters of electrical networks can develop into severe emergency conditions, leading to disconnection of consumers from the power supply. At oil pumping stations, chemical plants, metallurgy and other industries, synchro-nous motors (SM) with a voltage class of up to 10 kV and a power of up to 30 MW are widely used as drives [6], which is due to their advantages over asynchronous motors [7]. The purpose of the work was to analyze the use of an electrical energy storage system to increase the stability of load nodes.

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.

Тhe article presents the results of a study of the effect of voltage on the parameters of a nonlinear electrical receiver. The subject of the study is relevant, as the parameters of electrical receivers are the initial data for modeling load nodes, which is performed in order to optimize the parameters of higher harmonic filters or their compensation devices. In the load nodes of a 0.38 kV distribution network with an asymmetric load, the voltage constantly changes. It is known that nonlinear electrical receivers have a nonlinear current-voltage characteristic, and the changing voltage will affect the parameters of the electrical receiver. The purpose of the study was to determine the extent of the influence of voltage changes on parameter estimates. Two laptops of well-known manufacturers are taken as objects of research. The article presents the results of the research.