scholarly journals Experimental determination of suboptimal parameters for energy-efficient control of an induction motor

2020 ◽  
Vol 11 (4) ◽  
pp. 2173 ◽  
Author(s):  
Valentina S. Goun ◽  
Aleksandr S. Anikin ◽  
Aleksey A. Bakin
Keyword(s):  
Mathematical Model ◽  
Induction Motor ◽  
Power Factor ◽  
Experimental Studies ◽  
Electric Energy ◽  
Point Of View ◽  
Electric Energy Consumption ◽  
Stator Current ◽  
Thyristor Control ◽  
Regulatory Characteristic

The article presents the results of experimental studies of the automatic speed control system (ASCS) of an induction motor (IM). Preliminary experimental studies have shown that the stator current minimum (power factor) is a suboptimal criterion. Optimal in terms of control is the rated power factor. Tests of IM with a thyristor voltage converter (TVC), as a power source, were conducted on an installation created at the department. A mathematical model of ASCS IM corresponding to the experimental setup has been developed. To determine the main functional dependences of IM, such as stator voltage, stator current, power factor, torque on the shaft, a program for approximating experimental data by polynomials was developed. Using the developed mathematical model, the regulatory characteristic of IM that was optimal from an energy point of view was obtained. The necessary indicators of IM and TVC are determined (thyristor control angle, stator voltage, stator current) to change existing settings in order to save electric energy. The results of experimental studies are presented, the graph shows an optimized version of the form of the regulatory characteristic according to the criterion of minimum electric energy consumption.

Research on Jobshop Scheduling Problem with Energy Consumption

2011 ◽  
Vol 314-316 ◽  
pp. 2071-2075
Author(s):  
Jia Hai Wang ◽  
Wen Tao Gong
Keyword(s):  
Mathematical Model ◽  
Energy Consumption ◽  
Processing Time ◽  
Electric Energy ◽  
Low Carbon ◽  
Load Shifting ◽  
Electric Energy Consumption ◽  
Jobshop Scheduling ◽  
Time Division ◽  
The Mathematical Model

Discrete machine manufacture enterprises have to induce new low-carbon manufacturing model in order to solve a dilemma of mutual restraint between development and electric energy consumption. The paper presents an approach to solve JSP with the objective of minimizing the energy consumption by shortening the distance between electricity peak and valley according to theory of load shifting in electricity. The mathematical model is proposed for JSP with objective of minimizing the energy consumption and processing time of entire batch, then the idea of time division is introduced, and a solving method based on GA built-in eM-Plant is employed to verify the model and get satisfactory scheduling results.Discrete machine manufacture enterprises have to induce new low-carbon manufacturing model in order to solve a dilemma of mutual restraint between development and electric energy consumption. The paper presents an approach to solve JSP with the objective of minimizing the energy consumption by shortening the distance between electricity peak and valley according to theory of load shifting in electricity. The mathematical model is proposed for JSP with objective of minimizing the energy consumption and processing time of entire batch, then the idea of time division is introduced, and a solving method based on GA built-in eM-Plant is employed to verify the model and get satisfactory scheduling results.

scholarly journals The implementation of small-scale hydropower stations in slow flow micro-rivers: a case study of Uzbekistan

2019 ◽  
Vol 135 ◽  
pp. 01036 ◽  
Author(s):  
Dilshod Kodirov ◽  
Obid Tursunov ◽  
Sevarakhon Parpieva ◽  
Nusratillo Toshpulatov ◽  
Kurash Kubyashev ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Fossil Fuels ◽  
Experimental Studies ◽  
Electric Energy ◽  
Point Of View ◽  
Small Scale ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Independent Basis ◽  
Hydropower Stations

Electric energy production in small-scale hydropower stations is attractive from both an ecological and an economical point of view. Technological innovations and measures to lessen environmental impacts make small-scale hydropower stations inexpensive and justified energy sources that provide renewable energy on an independent basis and help not only to protect the environment but also to weaken human dependence on fossil fuels. This study is devoted to finding solutions based on renewable energy technologies and innovations in Uzbekistan. This article is devoted to the development of a water wheel experimental model for the micro-hydroelectric power station. Experimental studies were carried out on the basis of this model and obtained results were used in the preliminary calculations. The results from the calculations showed that the installation can generate 7-11 kWh of electricity per hour, about 168-264 kWh of electricity per day and 61 to 96 MWh of electricity per year.

scholarly journals Calculation of specific rates of the electric energy consumption at frequency regulation of electric drives: A case study of pumping stations

2021 ◽  
Vol 939 (1) ◽  
pp. 012001
Author(s):  
T Kamalov ◽  
A Isakov ◽  
A Shavazov ◽  
A Elmuratova ◽  
B Tukhtamishev
Keyword(s):  
Energy Consumption ◽  
Experimental Studies ◽  
Electric Energy ◽  
Electrical Energy ◽  
Design Parameters ◽  
Frequency Regulation ◽  
Electric Drives ◽  
Electric Energy Consumption ◽  
Pumping Stations ◽  
Pumping Units

Abstract The issues of developing a methodology for calculating the specific rates of electrical energy consumption during frequency regulation of electric drives of pumping stations are considered. When calculating specific consumption rates, experimental studies were carried out at the Chirchik pumping station. When developing the methodology, technological, design parameters, water consumption, as well as the total capacity of pumping units based on frequency-controlled electric drives are taken into account. At the same time, the characteristics of the main parameters that must be taken into account when choosing variable frequency drives for pumping units are determined.

scholarly journals PENGGUNAAN VARIABLE SPEED DRIVE PADA MOTOR INDUKSI UNTUK PENGHEMATAN KONSUMSI ENERGI LISTRIK

2020 ◽  
Vol 22 (2) ◽  
Author(s):  
Abdul Multi ◽  
Ervien Febryane
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Induction Motor ◽  
Electric Energy ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Electric Energy Consumption ◽  
Before And After ◽  
Reduction Of Energy Consumption ◽  
Cage Induction Motor

Variable speed drive (VSD) is used not only for controlling the speed but also for saving the electric energyconsumption. In this research VSD is applied to 3 phase squirrel cage induction motor used for water pumping inthe industry. VSD is needed to be applied to induction motors because these motors are the largest electricconsumed. Measurement and calculation are performed in the two conditions, before and after attaching VSD inthe motor. Electric quantities are obtained by measurement in the input and in the output of VSD. While energyconsumption and consumption cost are obtained by calculation. Finally, calculation of energy saving and costsaving are perfomed by comparing those two conditions. Aplication of VSD in the induction motor has advantagesfor saving electric energy consumption dan making it last longer. The energy saving and cost saving per year result1.003.984,8 kWh and IDR 732.908.904 respectlively. The longer life is caused by reduction of energy consumption.

scholarly journals Comparison of Single- and Multipipe Earth-to-Air Heat Exchangers in Terms of Energy Gains and Electricity Consumption: A Case Study for the Temperate Climate of Central Europe

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8217
Author(s):  
Łukasz Amanowicz ◽  
Janusz Wojtkowiak
Keyword(s):  
Heat Exchangers ◽  
Experimental Studies ◽  
Electric Energy ◽  
Electricity Consumption ◽  
User Preferences ◽  
Temperate Climate ◽  
Pressure Losses ◽  
Electric Energy Consumption ◽  
Energy Gains ◽  
Single Pipe

Earth-to-air heat exchangers (EAHEs) can be used in the ventilation systems of various types of buildings. Multipipe structures can be found in large-volume buildings, yet scientific analysis of such systems is rare. Annual energy gains and electricity consumption for equivalent single-pipe and multipipe systems are typically not available. This paper bridges this gap, presenting the results of experimental studies on pressure losses in three-, five- and seven-pipe EAHEs and analysis for the annual energy gains and electric energy consumption as compared to a single-pipe exchanger. The results showed that the multipipe EAHE can be successfully replaced by a single-pipe structure with the same thermal performance and similar pressure losses if a tube with the appropriate diameter is used. However, multipipe heat exchangers can also use pipes of larger diameter (manifolds and/or branches), which improves their energy efficiency and may then make them more advantageous than single-pipe structures. From this reason, ultimately, the final selection of exchanger geometry should take into account economic and environmental issues and also user preferences and their importance in the hierarchy.

scholarly journals Research of modular multilevel converter with phase-shifted pulse-width modulation

2021 ◽  
Vol 280 ◽  
pp. 05009
Author(s):  
Ihor Kozakevych ◽  
Roman Siyanko
Keyword(s):  
Mathematical Model ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Electric Energy ◽  
Point Of View ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Energy Converter ◽  
Circulating Current

The work is devoted to the study of performance of a multilevel electric energy converter using phase-shifted pulse-width modulation. Equations describing the state of a dynamic system multilevel converter - load are investigated and a mathematical model of the system in Matlab / Simulink environment has been constructed. Variants of implementation of phase-shifted pulse-width modulation systems from the point of view of influence on harmonics of output voltage and magnitude of circulating current in the converter are investigated.

scholarly journals EXPERIMENTAL STUDIES OF BRUSHLESS MAGNETOELECTRIC MOTORS OF THE RETURN-ROTARY MOTION

2021 ◽  
Vol 2021 (58) ◽  
pp. 74-81
Author(s):  
V.G. Kireyev ◽  
◽  
K.P. Akinin ◽  
A.A. Filomenko ◽  
V.A. Lavrinenko ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Experimental Determination ◽  
Experimental Studies ◽  
Frequency Characteristics ◽  
Rotary Motion ◽  
Experimental Frequency ◽  
Stator Current ◽  
The Mathematical Model ◽  
Frequency Dependences

The paper describes the structure and mathematical model of a specialized brushless magnetoelectric motor of return-rotary motion. The analysis of the parameters of the mathematical model is carried out and the methods of their experimental determination are described. Experimental frequency dependences of the rotor oscillations angle amplitude and the stator current effective value have been obtained. Based on the obtained parameters, the frequency characteristics of the motor were calculated and compared with the experimental dependences. Experimental oscillograms and calculated curves of stator voltages and currents are presented. References 7, figures 8.

Power Factor Improvement for Pumping Stations using Capacitor Banks

2016 ◽  
Vol 17 (5) ◽  
pp. 597-605
Author(s):  
M. M. Mohamad ◽  
Amal F. Abd El-gawad ◽  
H. S. Ramadan
Keyword(s):  
Power Factor ◽  
Electric Energy ◽  
Operating Efficiency ◽  
Pumping Station ◽  
Electric Energy Consumption ◽  
Capacitor Banks ◽  
Motor Circuits ◽  
Pumping Stations ◽  
Electrical Motors ◽  
Power Factor Improvement

Abstract One of the fundamental problems affects the performance of pumping stations is its relative high operational cost. As three-phase induction motors are the main prime mover of pumping stations and considered the most widely used electrical motors due to their reliability, ease of maintenance. However, its major problem is the low power factor which results in high electric energy consumption. Energy will be saved when power factor is improved. The main objective of this paper is studying the power factor improvement in El sadaa Pumping Station because of its low operating efficiency which goes from 20 % to 25 %and calculating penalty, ponus and savings in each cases. The correction is achieved by the addition of capacitor banks in parallel with the connected motor circuits and can be applied to the starter, applied at the switchboard or the distribution panel. A model of this station is created using MatlabTM Simulink. Then the determination of induction motor parameters is performed. The station model is discussed. From the simulation results, the power factor enhancement of the pumping station is highlighted.

scholarly journals Application of Super-Twisting Sliding Mode Controllers in Direct Field-Oriented Control System of Six-Phase Induction Motor: Experimental Studies

2018 ◽  
Vol 3 (1) ◽  
pp. 23-34
Author(s):  
Jacek Listwan
Keyword(s):  
Mathematical Model ◽  
Induction Motor ◽  
Sliding Mode ◽  
Experimental Studies ◽  
Space Vector Modulation ◽  
Field Oriented Control ◽  
Sliding Mode Controllers ◽  
Vector Modulation ◽  
Twisting Algorithm ◽  
The Mathematical Model

Abstract This paper presents the direct field-oriented control (DFOC) method of six-phase induction motor with the application of super-twisting sliding mode algorithm. The mathematical model of the six-phase induction motor has been described. The descriptions of the space vector modulation (SVM) method and the super-twisting algorithm have been presented. The DFOC method with super-twisting sliding mode controllers has been described. The experimental studies of the DFOC method with super-twisting controllers have been performed, and the results of these studies are presented and discussed.

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