Design of Phase-Shifting Transformer Based on Simulink Matlab Simulation

Using variable speed drive for controlling speed of three-phase induction motor in industrial sector gives an advantage of reducing consumption of electrical energy; on the other hand, it also causes a disadvantage of source current harmonic. To solve the problem of source current harmonic, a method of using phase-shifting transformer is applied. This method may be applied in a system with two VSDs or more connected to a three-phase power supply. The application of this phase-shifting transformer method could be as simple as using of two transformer with Y-y (wye-wye) and Y-d (wye-delta) three-phase winding connections to give a phase-shifting of 30 or more complex as it uses two transformer with Y-y and Y-z (wye-zigzag) three-phase winding connections to give a phase-shifting less than 30. This paper proposes design of five different phase-shifting transformer configurations to produce 30, 20, 15, 12 and 10 phase-shifting. Simulation on a computer-based software, Simulink Matlab, then confirmed that the proposed phase-shifting transformer design gives a very accurate result regarding to phase-shifting and magnitudes of input and output voltage of the phase-shifting transformers.

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Elimination of interharmonic currents by a FAP using the technique of compensation global

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v11.i1.pp228-234 ◽

2020 ◽

Vol 11 (1) ◽

pp. 228

Author(s):

Mohamed Ali Moussa ◽

Bachir Belmadani ◽

Ahmed Wahid Belarbi ◽

Rachid Taleb

Keyword(s):

Asynchronous Motor ◽

Distribution Network ◽

Harmonic Distortion ◽

Electrical Energy ◽

Electrical Network ◽

Pwm Inverter ◽

Three Phase ◽

Source Current ◽

Quality Of Electrical Energy

This document is a contribution to improve the quality of electrical energy in the distribution network. In this article we will present a method that allows us to clean up in a very considerable way the electrical network of both harmonics and inter harmonics provoked, basically by the ultrafast switches used when controlling a PWM inverter supplying a three-phase asynchronous motor. We notice that this method can be generalized for other loads creating inter-harmonics. This proposed method was simulated using the MATLAB/SIMULINK software and had given remarkable results (there is a considerable reduction in total harmonic distortion (THD) of source current from 29.52% to 0.82%)

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An Intelligent Motor-Pump System

Intelligent Information Systems and Knowledge Management for Energy ◽

10.4018/978-1-60566-737-9.ch015 ◽

2010 ◽

pp. 400-422

Author(s):

P. Giridhar Kini

Keyword(s):

Induction Motor ◽

Electrical Energy ◽

Industrial Sector ◽

Pump Efficiency ◽

System Efficiency ◽

Centrifugal Pumps ◽

Pump System ◽

Load Variations ◽

Three Phase ◽

Input Side

Process industries are energy intensive in nature and are one of the largest consumers of electrical energy that is commercially generated for utilization. Motor driven systems consume more than two-thirds of the total energy consumed by the industrial sector; among which, centrifugal pumps are the most widely used equipment mainly for the purpose of fluid transportation. The efficiency of pumping units is around 40 to 50%, hence they offer tremendous opportunities of not only improving the efficiency of the process, but also ensure effective energy utilisation and management. With the increasing use of power electronics equipment, power quality (PQ) has become a very serious issue of consideration. On account of the random switching of single-phase loads in addition to time varying operations of industrial loads, PQ problem of voltage variation and unbalance is inevitable across three-phase systems. Application of varying or unbalanced voltages across the three-phase motor terminals results in performance variations leading to inefficient operation. For the purpose of study, the performance of a motor-pump system can be separately analyzed from the motor and pump points of view. The motor efficiency may vary in a very narrow band, pump efficiency depends upon the system head and flow rate but the system efficiency is a combination of the two; hence, necessary to analyze separately. As centrifugal pumps are classified under variable torque-variable speed load category, variation on the input side has a significant effect on the output side. Therefore the system efficiency now becomes an important index for ensuring efficient energy utilisation and efficiency. The main objective of the chapter is to put forward a methodology to analyze the working performance of a three-phase induction motor driven centrifugal pump under conditions of voltage and load variations by, defining additional factors for correct interpretation about the nature and extent of voltage unbalance that can exist in a power system network; define induction motor derating factors for safe and efficient operation based on operational requirements and devise energy management strategies for efficient utilization of electrical energy by the motor-pump system considering the voltage and load conditions.

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Simulation of source current harmonic elimination technique using phase shifting transformer

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/830/3/032028 ◽

2020 ◽

Vol 830 ◽

pp. 032028

Author(s):

I M W Kastawan ◽

E Yusuf ◽

A Fadhilah

Keyword(s):

Phase Shifting ◽

Current Harmonic ◽

Harmonic Elimination ◽

Source Current

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Temperature Control System for Transformer Three-Phase 50 Hz 2500 kVA

JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI ◽

10.36722/sst.v3i2.190 ◽

2017 ◽

Vol 3 (2) ◽

pp. 88

Author(s):

Suci Rahmatia ◽

Marsah Zaysi Makhudzia

Keyword(s):

Optimal Control ◽

Control System ◽

Heat Loss ◽

Temperature Control ◽

Electrical Energy ◽

Temperature Control System ◽

Iron Core ◽

Electrical Device ◽

Optimal Control System ◽

Three Phase

Abstrak - Transformator adalah peralatan listrik yang sangat vital dalam proses pembangkitan maupun transmisi energi listrik karena transformator dapat menaikkan atau menurunkan tegangan. Pada proses menaikkan dan menurunkan tegangan biasanya sering timbul panas akibat rugi – rugi tembaga pada inti besi dan kumparannya sehingga pada kondisi overload akan menimbulkan pemanasan yang berlebih dan dapat mempengaruhi kinerja transformator. Oleh karena itu dibuat sistem kontrol temperatur pada transformer yang dapat mengontrol temperatur di dalam transformator saat bekerja pada kondisi overload, sehigga transformatornya tidak terbakar. Dial thermometer digunakan sebagai alat yang mengontrol temperatur transformator pada sistem kontrol temperatur. Agar mendapatkan sistem kontrol yang optimal, maka setting temperatur pada dial thermometer di sesuaikan dengan temperatur maksimal tranformator dapat bekerja. Sehingga pada saat temperatur tertentu dial thermometer dapat memberikan sinyal untuk membunyikan alarm dan mengaktifkan kontrol kipas sehingga kipas dapat bekerja menurunkan temperatur transformator. Kata kunci - transformator, rugi – rugi tembaga, temperatur, sistem kontrol, dial thermometer. Abstract - A transformer is an electrical device that is vital in the generation and transmission of electrical energy because the transformer can raise (stepping up) or lower (stepping down) the voltage. In the process of raising and lowering the voltage is usually often caused heat loss of copper in iron core and coil so that the overload condition will cause excessive warming and can affect the performance of the transformer. Therefore, a temperature control system on the transformer can control the temperature inside the transformer while working under overload conditions, so the transformer is not burned. Dial thermometer is used as a device that controls the temperature of the transformer in the temperature control system. In order to obtain an optimal control system, the temperature setting on the dial thermometer adjusted to the maximum transformer temperature can work. So that when a certain temperature dial thermometer can provide a signal to sound the alarm and activate the fan control so that the fan can work down the transformer temperature. Keywords - transformator, loss of copper, themperature, control system, dial thermometer

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Development of Three-Phase Permanent-Magnet Synchronous Motor Drive with Strategy to Suppress Harmonic Current

Energies ◽

10.3390/en14061583 ◽

2021 ◽

Vol 14 (6) ◽

pp. 1583

Author(s):

Wei-Tse Kao ◽

Jonq-Chin Hwang ◽

Jia-En Liu

Keyword(s):

Permanent Magnet ◽

Electromotive Force ◽

Permanent Magnet Synchronous Motor ◽

Synchronous Motor ◽

Motor Drive ◽

Actual Measurement ◽

Current Harmonic ◽

Three Phase ◽

Measurement Results ◽

Harmonic Components

This study aimed to develop a three-phase permanent-magnet synchronous motor drive system with improvement in current harmonics. Considering the harmonic components in the induced electromotive force of a permanent-magnet synchronous motor, the offline response of the induced electromotive force (EMF) was measured for fast Fourier analysis, the main harmonic components were obtained, and the voltage required to reduce the current harmonic components in the corresponding direct (d-axis) and quadrature (q-axis) axes was calculated. In the closed-loop control of the direct axis and quadrature axis current in the rotor reference frame, the compensation amount of the induced EMF with harmonic components was added. Compared with the online adjustment of current harmonic injection, this simplifies the control strategy. The drive system used a 32-bit digital signal processor (DSP) TMS320F28069 as the control core, the control strategies were implemented in software, and a resolver with a resolver-to-digital converter (RDC) was used for the feedback of angular position and speed. The actual measurement results of the current harmonic improvement control show that the total harmonic distortion of the three-phase current was reduced from 5.30% to 2.31%, and the electromagnetic torque ripple was reduced from 15.28% to 5.98%. The actual measurement results verify the feasibility of this method.

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Research of Simulation in the Main Circuit of Static Var Generator Based on Cascade H-Bride

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.392.409 ◽

2013 ◽

Vol 392 ◽

pp. 409-412

Author(s):

Xian Bin Dai ◽

Xiao Hua Yuan ◽

Wei Du

Keyword(s):

Output Voltage ◽

Power Index ◽

Matlab Simulation ◽

Voltage Waveform ◽

Distortion Factor ◽

Harmonic Content ◽

Three Phase ◽

Static Var Generator ◽

Waveform Distortion ◽

Working Principle

This paper introduces the working principle of the research of simulation in the main circuit of Static Var Generator based on Cascade H-Bride and takes the three-phase Static Var Generator based on cascade H-Bride with rated capacity 10kVar,rated voltage 380V for example to proceed the MATLAB simulation. The research shows that the more amount of cascade H-Bride, the more number of output voltage levels in the main circuit of Static Var Generator, the smaller value of voltage waveform distortion factor, and the less harmonic content be inject in electric network, which improves power index.

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IMPROVED INDIRECT FIELD-ORIENTED CONTROL OF INDUCTION MOTOR DRIVE BASED PSO ALGORITHM

Jurnal Teknologi ◽

10.11113/jt.v78.8888 ◽

2016 ◽

Vol 78 (6-2) ◽

Author(s):

Jamal Abd Ali ◽

M A Hannan ◽

Azah Mohamed

Keyword(s):

Induction Motor ◽

Speed Control ◽

Pso Algorithm ◽

Pi Controller ◽

Field Oriented Control ◽

Variable Speed ◽

Three Phase ◽

Indirect Field Oriented Control ◽

Speed Response ◽

Variable Speed Control

Optimization techniques are increasingly used in research to improve the control of three-phase induction motor (TIM). Indirect field-oriented control (IFOC) scheme is employed to improve the efficiency and enhance the performance of variable speed control of TIM drives. The space vector pulse width modulation (SVPWM) technique is used for switching signals in a three-phase bridge inverter to minimize harmonics in the output signals of the inverter. In this paper, a novel scheme based on particle swarm optimization (PSO) algorithm is proposed to improve the variable speed control of IFOC in TIM. The PSO algorithm is used to search the best values of parameters of proportional-integral (PI) controller (proportional gain (kp) and integral gain (ki)) for each speed controller and voltage controller to improve the speed response for TIM. An optimal PI controller-based objective function is also used to tune and minimize the mean square error (MSE). Results of all tests verified the robustness of the PSO-PI controller for speed response in terms of damping capability, fast settling time, steady state error, and transient responses under different conditions of mechanical load and speed.

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