Кафедра "Електричні апарати"

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/43

Офіційний сайт кафедри http://web.kpi.kharkov.ua/ea

Кафедра "Електричні апарати" була створена в 1931 році при Харківському електротехнічному інституті. Засновником, організатором і першим завідувачем кафедри був видатний фахівець в галузі електротехніки професор Вашура Борис Федорович.

Кафедра входить до складу Навчально-наукового інституту енергетики, електроніки та електромеханіки Національного технічного університету "Харківський політехнічний інститут", веде підготовку фахівців що мають глибокі знання з електромеханіки та різнобічні знання в області комп’ютерної техніки й інформаційних технологій.

У складі науково-педагогічного колективу кафедри працюють: 2 доктора технічних наук, 6 кандидатів технічних наук, 1 кандидат фізико-математичних наук; 5 співробітників мають звання доцента, 1 – старшого наукового співробітника.

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Improvement of power quality in grid-connected hybrid system with power monitoring and control based on internet of things approach
(Національний технічний університет "Харківський політехнічний інститут", 2022) Balakishan, Padakanti ; Chidambaram, Ilanji Akilandam; Manikandan, Mani
This article proposes a new control monitoring grid connected hybrid system. The proposed system, improvement of power quality is achieved with internet of things power monitoring approach in solar photovoltaic grid system network. The novelty of the proposed work consists in presenting solar power monitoring and power control based internet of things algorithm, to generate DC voltage and maintain the constant voltage for grid connected hybrid system. Methods. The proposed algorithm which provides sophisticated and cost-effective solution for measuring the fault and as maximum power point tracking assures controlled output and supports the extraction of complete power from the photovoltaic panel. The objective of the work is to monitor and control the grid statistics for reliable and efficient delivery of power to a hybrid power generation system. Internet of things is regarded as a network comprising of electronic embedded devices, physical objects, network connections, and sensors enabling the sensing, analysis, and exchange of data. The proposed control technique strategy is validated using MATLAB/Simulink software and real time implementation to analysis the working performances. Results. The results obtained show that the power quality issue, the proposed system to overcome through monitoring of fault solar panel and improving of power quality. The obtained output from the hybrid system is fed to the grid through a 3ϕ voltage source inverter is more reliable and maintained power quality. The power obtained from the entire hybrid setup is measured by the sensor present in the internet of things-based module. In addition to that, the photovoltaic voltage is improved by a boost converter and optimum reliability is obtained with the adoption of the perturb & observe approach. The challenges in the integration of internet of things – smart grid must be overcome for the network to function efficiently. Originality. Compensation of power quality issues, grid stability and harmonic reduction in distribution network by using photovoltaic based internet of things approach is utilized along with sensor controller. Practical value. The work concerns a network comprising of electronic embedded devices, physical objects, network connections, and sensors enabling the sensing, analysis, and exchange of data. In this paper, internet of things sensors are installed in various stages of the smart grid in a hybrid photovoltaic – wind system. It tracks and manages network statistics for safe and efficient power delivery. The study is validated by the simulation results based on MATLAB/Simulink software and real time implementation.
Energy efficiency of a 3-level shunt active power filter powered by a fuel-cell/battery dc bus with regulated duty cycles
(Національний технічний університет "Харківський політехнічний інститут", 2021) Bourouis, Billel; Djeghloud, Hind; Benalla, Hocine
Nowadays, electrical energy is indispensable in industrial, tertiary and domestic appliances. However, its efficiency is becoming affected by the presence of the disturbances that appear in the electrical networks such as harmonics, unbalance, sags/swells, flickers …etc. Indeed, the disturbances cause a decrease in the power factor and an increase in the power losses. In this paper, the harmonic disturbance is considered and a 3-level shunt active power filter powered by a hybrid fuel-cell/battery DC is applied to mitigate current harmonic components from the electrical feeder. Aim. Studying the energy efficiency of a system based on a 3-level shunt active filter powered by a hybrid fuel-cell/battery DC bus. Methodology. It is a matter of finding the suitable formulas that express the efficiency and the relative power losses according to the load factor (which is the ratio between the shortcircuit active power and the load active power) and the load power factor. The DC bus energy is controlled using an energy management algorithm that contributes in generating the required reference input currents and output voltages of the fuel-cell and the battery. The DC/DC converters control circuits are performed in a closed loop by means of regulated duty cycles. Results. The simulation results carried-out under MATLAB/Simulink environment show better filtering quality if compared with the case of open loop control of the DC/DC converters and lesser differences between the fuel-cell power, the battery power and their respective reference powers. Which concerns the energy efficiency, the results demonstrate that higher efficiency and lower relative power losses can be achieved only when higher load factor and load power factor are attained. Therefore, the compensating system of the power factor is very important to improve the energy efficiency.
An effective control algorithm for dynamic voltage restorer under symmetrical and asymmetrical grid voltage conditions
(Національний технічний університет "Харківський політехнічний інститут", 2021) Boussaid, Abdelfettah; Chelli, Seif El Islam; Nemmour, Ahmed Lokmane; Khezzar, Abdelmalek
Voltage sag, which is associated to a transitory drop in the root mean square voltage characterizing an electrical source network. During these perturbations, the corresponding electronic customers and devices will suffer from serious operating troubles causing dangerous damages. Purpose. In order to attenuate this disturbance effects, the Controlled Dynamic Voltage Restorer constitutes a very interesting solution among many others that have been proposed. The novelty of the proposed work consists in presenting an enhanced algorithm to control efficiently the dynamic voltage restorer when voltage sag is suddenly occurred. Methods. The proposed algorithm is based on an instantaneous phase locked loop using a multi variable filter to synthesize unitary signals involved in compensation voltages computation relative to the sag apparition. Practical value. A detailed study concerning typical voltage sag, which is consolidated by simulation and experimental results, is conducted to show the used algorithm’s effectiveness to cancel the corresponding voltage sag.
An adaptive harmonic compensation strategy for three-phase shunt active power filter based on double second-order generalized integrator with prefilter
(Національний технічний університет "Харківський політехнічний інститут", 2020) Kalkoul, Sami; Benalla, Hocine; Nabti, Khalil; Abdellatif, Reama
This study presents a straightforward adaptive prefiltering algorithm based on a double second-order generalized integrator with prefilter to solve one of the power quality issues, this algorithm is in charge of the determination of the reference harmonic currents in the control of three-phase shunt active power filter which presents an effective way to enhance the grid current quality. The proposed algorithm is used twice, to extract the harmonic currents produced by the non-linear loads and be an interesting part in the estimation of the frequency and amplitude of the fundamental voltage in various anomalies which can be noticed on the grid voltage. The performance, precision, and robustness of the proposed method are evidenced under balanced, unbalanced, and distorted grid voltage in the simulation and experimental results obtained by the implementation of the shunt active power filter on MATLAB-Simulink environment and the dSPACE 1104 platform respectively.
Численный анализ математических моделей распределения фактических вкладов в несимметрию и отклонение напряжений в точках общего присоединения систем электроснабжения
(НТУ "ХПИ", 2016) Саенко, Юрий Леонидович; Калюжный, Дмитрий Николаевич
На основе имитационного моделирования проведен сравнительный анализ математических моделей распределения фактических вкладов линейных источников искажений в искажение напряжений в точке общего присоединения, которые основаны на принципах наложения и исключения. Полученные результаты позволили сделать вывод об эквивалентности двух математических моделей и их произвольном выборе для решения задачи распределения фактических вкладов линейных источников искажений в искажение напряжений в точке общего присоединения.
Guaranteeing the trouble-free operation of capacitor banks in power-supply systems of industrial enterprises
(НТУ "ХПИ", 2016) Gapon, D. A.; Bederak, Ya. S.
The problem of resonance phenomena in power systems of industrial enterprises using capacitor banks for reactive power compensation was detected. Circuit of the capacitor banks tier to downshift main substation tires ispresent. But there is no common algorithm to calculate and avoid such trouble. The main goal of this article is to introduce some basics for power supply systems with possible resonant circuits engineering.
Контроль частоты в задачах математического моделирования и управления режимами электрических систем
(НТУ "ХПИ", 2014) Веприк, Юрий Николаевич; Ганус, Ольга Алексеевна
Для повышения быстродействия алгоритмов обработки первичных данных при определении частоты в задачах математического моделирования и управления режимами электрических систем предлагается выполнять переход от дискретных мгновенных значений параметров режима к представлению их обобщенными векторами.
Новые трехфазные автотрансформаторные фазосдвигающие устройства подавления высших гармоник тока
(НТУ "ХПИ", 2007) Пентегов, Игорь Владимирович; Рымар, Сергей Владимирович; Волков, Игорь Владимирович; Ларченко, Борис Борисович; Levin, Michael
Разработаны новые фазосдвигающие автотрансформаторные устройства подавления высших гармоник тока, которые могут использоваться в трехфазных электрических сетях без нулевого провода при работе с 12-пульсными схемами выпрямителей и с равномерно распределенными нелинейными нагрузками. Новая конструкция устройств обеспечивает улучшение массогабаритных и технико-экономических характеристик за счет размещения обмоток только на крайних стержнях магнитопровода, со свободным центральным стержнем.