scholarly journals Study The advantage of variable speed pumps Economically in pumping water lines using genetic algorithms

2020 ◽  
Vol 27 (3) ◽  
pp. 132-137
Author(s):  
Ibrahim Abdalrhman Abdaljlel ◽  
Adel Youssef Georgi ◽  
Amjad Hamed Shaker
Keyword(s):  
Genetic Algorithms ◽  
Engine Speed ◽  
Variable Frequency ◽  
Variable Speed ◽  
Variable Frequency Drive ◽  
Water Project ◽  
Operating Schedule ◽  
Pumping Stations ◽  
Pressure Discharge ◽  
Investment Cost

This study includes a comparison between the use of fixed and variable speed VSP pumps, in terms of investment cost, through finding the operating schedule of pumps, for three pumping stations, using the method of genetic algorithms. The use of VSP pumps will reduce the investment costs of the Water project by more than 15%, in relation to the use of fixed speed pumps (FSP) with the same speed, pressure, discharge and engine speed . The FSP has been modified to become a VSP, using a Variable  Frequency drive

Research on Multi-Speed Control of Variable-Frequency Drive

2014 ◽  
Vol 538 ◽  
pp. 425-428
Author(s):  
Xiao Na Song
Keyword(s):  
Previous Experiment ◽  
Speed Control ◽  
Variable Frequency ◽  
Variable Speed ◽  
Variable Frequency Drive ◽  
Experimental Teaching ◽  
Three Phase ◽  
Speed Mode ◽  
Plc Program

This paper introduces a noval experimental teaching project. Different from previous experiment, in this project, three-phase motor can operate at multi-speed mode or continuously variable speed mode controlled by PLC and VFD. The obvious characteristic of the experiment is that the VFD is controlled by PLC automatically. The configuration of the experiment including hardware and software is introduced in detail. The results of the execuation of the PLC program reveals that three-phase motor can operate in two modes according to the instructions from PLC. In addition, the speed can be changed with the corresponding parameters seting. Therefore, the knowledge of PLC and VFD are combined in one teaching project, through which student can master more practical technique. The work of this paper is significant for improving the students’ comprehensive capability.

scholarly journals IMPLEMENTASI PENGATUR KECEPATAN MOTOR PADA MESIN CONVEYOR PENYORTIR LOGAM OTOMATIS

2020 ◽  
Vol 6 (1) ◽  
pp. 32
Author(s):  
Mindit Eriyadi ◽  
Indra Maryana Lesmana Putra
Keyword(s):  
Induction Motor ◽  
Variable Frequency ◽  
Programmable Logic ◽  
Prime Mover ◽  
Variable Speed ◽  
Digital Output ◽  
Variable Frequency Drive ◽  
Logic Control ◽  
Programmable Logic Control ◽  
Speed Parameter

Metal sorting conveyor is a device that is used to separate metal and non-metal objects, the drive of this conveyor uses ½ Horse Power (HP) induction motor as its prime mover. To adjust the rotation of the induction motor 1 HP Variable Frequency Drive (VFD) is used. This VFD is set with the double speed parameter so that later the motor can rotate variably in two speeds. The input parameters of the VFD itself use switches in the form of photo electric and inductive proximity which are controlled automatically using Programmable Logic Control (PLC). The digital output of the PLC will then communicate with the digital input of the VFD so that when the object on the conveyor is detected by a photoelectric, the VFD will adjust the frequency by 8,5 Hz, if the object on the conveyor is detected by metal by inductive proximity, the VFD will set the frequency by 14,5Hz . So that at each of these frequencies the motor can rotate with speeds of 241,5 rpm and 359,5 rpm. The results of the trials carried out show that VFD can regulate in a number of speeds in a variable manner, but in this study limited to using two speeds or double speed as a variable speed experiment.

Cost Effective Automatic Garage Door Mechanism With Variable Speed

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Yuvraj Prajapati ◽  
Shrey Patel ◽  
Monark Shah ◽  
Raj Chokshi ◽  
Om Prakash Shukla
Keyword(s):  
Mechanical System ◽  
Cost Effective ◽  
Industrial Applications ◽  
Variable Frequency ◽  
Variable Speed ◽  
Electrical System ◽  
Variable Frequency Drive ◽  
Mechanical Part ◽  
Day By Day ◽  
At Home

The aim of our project is to provide safety as well as security to people from the largest electromechanical objects which are available at home. An automatic garage door mechanism was selected as a subject of our research as it is the complex electro-chemical object at home. As technology increases day by day every households installs this automatic garage door mechanism. The major problem with the conventional garage door system was child entrapment and people are in wheelchair are also affected by the conventional garage door mechanism. We are planning to eliminate the problems which are available in the conventional garage door mechanism by providing some extra safety and security features to our automatic garage door mechanism.an automatic garage door mechanism is the combination of mechanical and electrical system in which mechanical system guides the system as well as direct the shutter movement While, electrical system is used to provide energy to mechanical part. Sectional overhead doors have become the standard door type for garages. Our motive behind this study is to increase the safety and security of the automatic garage doors as well as make it to operatable at variable speed. Safety of the equipment is going to be increased by an area presence sensor which will reduce the child entrapment cases. Only authorized people can access the garage, that will increase the security and use of the VFD-variable frequency drive will make the garage door operatable at owner desired working speed. These shutters can be used for home applications as well as industrial applications.

scholarly journals Advanced Control of a Compensator Motor Driving a Variable Speed Diesel Generator with Rotating Stator

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2224
Author(s):  
Mohammadjavad Mobarra ◽  
Bruno Tremblay ◽  
Miloud Rezkallah ◽  
Adrian Ilinca
Keyword(s):  
Diesel Engine ◽  
Asynchronous Motor ◽  
Operating Conditions ◽  
Variable Frequency ◽  
Variable Speed ◽  
Diesel Generator ◽  
Variable Frequency Drive ◽  
Advanced Control ◽  
Optimal Value ◽  
Processor Board

Variable speed generators can improve overall genset performance by allowing the diesel engine to reduce its speed at lower loads. In this project, a variable speed diesel generator (VSDG) uses a rotating stator driven by a compensator motor. At lower loads, the stator turns in the opposite direction of the rotor, a process that can be used for purposes like maintaining a fixed relative speed between the two components of a generator. This allows the diesel engine to turn at a lower speed (same as the rotor) and to increase its efficiency. The present research addresses the control of the compensator motor driving the generator’s stator using a variable-frequency drive that adapts the speed to its optimal value according to the load. The performance of the proposed control strategy was tested using a Freescale microcontroller card programmed in C-code to determine the appropriate voltage for the variable-frequency drive. The control algorithm uses a real-time application implemented on an FDRM-KL25Z signal processor board. The control performance of a 2 kW asynchronous motor (LabVolt EMS 8503-00/208 V/3 ϕ/60(50) Hz) was demonstrated experimentally at different operating conditions.

Опыт использования частотных преобразователей на объектах ООО «Водоканал»

2020 ◽  
Author(s):  
Sergei, Rybel’ ◽  
V. Kuninin ◽  
S. Gerasimov ◽  
A. Bakushin
Keyword(s):  
Inrush Current ◽  
Electric Motors ◽  
Variable Speed ◽  
Variable Speed Drives ◽  
Technical Device ◽  
Advantages And Disadvantages ◽  
Subsequent Period ◽  
Pumping Stations ◽  
Current Water ◽  
Pumping Equipment

Приведен опыт применения частотно-регулируемых электроприводов на насосных станциях ООО Водоканал г. Новокузнецка. Приводятся преимущества и недостатки данного технического устройства. Показано, что в настоящее время использование частотно-регулируемых приводов позволило снизить потребление электроэнергии более чем на 20, уменьшить затраты на ремонт и обслуживание, повысить срок службы электродвигателей, уменьшить величину пускового тока, снизить утечки воды и нагрузку на насосное оборудование и трубопроводную арматуру. Применение частотно-регулируемых электроприводов оправдало себя и в тех случаях, когда требуется регулирование параметров для обеспечения технологии (регулирование скорости, производительности и т. д.), приведение параметров оборудования к требуемым значениям без его замены (в расчете на увеличение загрузки оборудования до номинала в последующий период), компенсация суточной неравномерности потребления воды.The experience of using variable speed drives at the pumping stations operated by Vodokanal LLC in Novokuznetsk is presented. The advantages and disadvantages of this technical device are specified. It is demonstrated that currently, the use of variable speed drives provides for reducing the energy consumption by more than 20, reducing the repair and maintenance costs for improving the service life of electric motors for reducing inrush current, water leaks and the load on the pumping equipment and pipeline valving. The use of variable speed drives has paid off even in case where adjusting the parameters to ensure the technology (velocity, performance, etc.) bringing the equipment parameters to the required values without replacing it (in order to increase the equipment load to the nominal value for the subsequent period) compensating for daily irregularities in water consumption are required.

A Study on the New Grid Integration Solutions of Offshore Wind Farms

2011 ◽  
Vol 383-390 ◽  
pp. 3610-3616 ◽  
Author(s):  
Xin Yin Zhang ◽  
Zai Jun Wu ◽  
Si Peng Hao ◽  
Ke Xu
Keyword(s):  
Wind Farm ◽  
Wind Farms ◽  
Offshore Wind ◽  
Grid Integration ◽  
Variable Speed ◽  
Reliable Operation ◽  
Offshore Wind Farms ◽  
Electrical Interconnection ◽  
Investment Cost ◽  
And Performance

Offshore wind farm is developed in the ascendant currently. The reliable operation, power loss, investment cost and performance of wind farms were effect by the integration solutions of electrical interconnection system directly. Several new integration configurations based on VSC-HVDC were comparative analyzed. For the new HVDC topology applied the wind farm internal DC bus, the Variable Speed DC (VSDC) system that is suitable for those topologies was proposed. The structure of VSDC was discussed and maximum wind power tracking was simulated on the minimal system. It is clear that new integration configurations based on VSC-HVDC has good prospects.

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