Electrical and Electronic Engineering, Electrical and Electronic Engineering
3
Scopus Publications
Scopus Publications
Analysis of the process of balanced charging of the battery group with high capacity Khasan Murodov, Askarbek Karshibayev, Shukhrat Abdullayev E3s Web of Conferences, 2024 The article presents an analysis of the types of high-capacity batteries, their applications and charging processes. The characteristics of stationary batteries are also listed. Comparative characteristics of parameters of modern various chemical accumulators of electric energy of lead-acid, nickel-cadmium, nickel-manganese and lithium-ion batteries are given. The processes occurring in the battery after several cycles of operation are considered as a change in its wear rate. Supplied from a 32 single source, batteries are considered both passive and active charging methods through sequential processes. The disadvantages and advantages of passive and active methods are listed. The influence of the parameters of the state of batteries in a state of voltage imbalance on the number of its cycles, charge level and discharge depth indicators depending on the charging time, on the state of voltage imbalance has been studied.
Development of the management system of technical indications of high-power charger-discharger rectifier device Khasan Murodov, Askarbek Karshibayev E3s Web of Conferences, 2023 Uninterruptible power supply devices are the main sources of operational DC power supply to control devices and control devices. In addition, the charge-discharge rectifier devices in thermal power plants and substations are autonomous operational current sources of power plants and substations. This source is the main constant and alternating current source for relay protection devices, telecommunication devices, control and monitoring devices in power stations and substations. As switching devices, the most commonly used ones today are thyristor, controlled by the thyristor control electrode. It is possible to control the charging and discharging processes of the batteries. In this case, random charging or discharging of the battery will reduce its service life. Therefore, this article examines its management system. Today’s high-power uninterruptible power supply rectifier devices show that stations and substations are not ready for emergency situations due to their unstable operation and inability to control the state of the battery. Therefore, the improvement of this device remains the major issue.
Experimental research of the developed method to determine the network insulation for ungrounded AC systems in laboratory conditions Galina Tatkeyeva, Iskander Kurabayev, Nodir Ataullaev, Xasan Murodov International Conference on Electrical Computer and Energy Technologies Icecet 2022, 2022 The article depicts the results of comparing the classical method and the developed method to determine insulation parameters in ungrounded AC systems. The developed method is based on measuring magnitudes of zero-sequence voltage, phase-to-earth voltage, and phase angles of the phase-to-earth voltage vector, and the zero-sequence voltage vector before and after connecting additional susceptance between the phase and earth. This article explains the sequence of measurements for the two methods in the laboratory conditions, where the results of the comparison confirm that the values of RMS errors and relative RMS errors of the developed and classical methods have good convergence. An experimental study of the developed method for determining insulation parameters demonstrates satisfactory accuracy and is a safer method compared to the classical method due to the absence of a single-phase earth fault.
