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29,922 Article Results

Hybrid unified power quality conditioner for power quality enhancement

10.11591/ijpeds.v11.i4.pp2126-2134
Djellouli Djoudi , Benoudjafer Cherif , Toumi Toufik , Othmane Abdelkhalek
In a low-voltage electrical network, harmonics, reactive power, the current and voltage imbalance, and voltage dips have harmful effects on electrical equipments. To overcome these problems, the hybrid UPQC is proposed. This paper discusses the structure of passive filters, parallel active filters, serial and combines (UPQC) to study the compensation of all types of disturbances likely to appear in the grid. Furthermore, the aim of reducing the size, cost of UPQC is to improve the quality of electric power, making it in compliance with the new regulatory constraints, we proposed the hybrid UPQC which uses passive filters and a combination of active filters. To validate the proposed topology, several sags of source voltage have been applied, at the point of common coupling (PCC). The simulation results from MATLAB/Simulink are discussed to verify the proposed topology.
Volume: 11
Issue: 4
Page: 2126-2134
Publish at: 2020-12-01

Intelligent control of flywheel energy storage system associated with the wind generator for uninterrupted power supply

10.11591/ijpeds.v11.i4.pp2062-2072
Bensaid Amel , Zebirate Soraya , Chaker Abdelkader
Wind energy is currently the fastest-growing energy source in the world. However, the inherent characteristic of intermittent energy production, due to the stochastic nature of wind, still comprises the main drawback of wind power. To avoid such problems, various configurations have been reccomended in order to reduce output power variation. The paper concentrates on performance benefits of adding energy storage system with the wind generator in order to regulate the electric power delivered into the power grid. Compared with other means of energy storage, the flywheel energy storage system (FESS) is the best choice to solve power quality problems. In this paper, a FESS associated to a variable speed wind generation (VSWG) is investigated by presenting two control strategies applied to the storage system equipped with an induction machine; both techniques are studied and developed and consist of a field control (FOC) and a Fuzzy Logic Control (FLC). Simulation model is established in MATLAB/Simulink and comparative results are then reported.
Volume: 11
Issue: 4
Page: 2062-2072
Publish at: 2020-12-01

Hybrid compensation of polarization-multiplexed QPSK optical format for high bit rate networks

10.11591/ijeecs.v20.i3.pp1325-1331
Omar Y. Shabaan , Omar A. Athab
Transmitting the highest capacity throughput over the longest possible distance without any regeneration stage is an important goal of any long-haul optical network system. Accordingly, polarization-multiplexed quadrature phase-shift-keying (PM-QPSK) was introduced lately to achieve high bit-rate with relatively high spectral efficiency. Unfortunately, the required broad bandwidth of PM-QPSK increases the linear and nonlinear impairments in the physical layer of the optical fiber network. Increased attention has been spent to compensate for these impairments in the last years. In this paper, single mode fiber (SMF), single channel, PM-QPSK transceiver was simulated, with a mix of optical and electrical (digital signal processing (dsp) compensation stages to minimize the impairments  The behaviour of the proposed system was investigated under four conditions: without compensation, with only optical compensator, with only DSP compensator and finally with both compensators. An evidence improvement was noticed in the case of hybrid compensation; where the transmission distance was multiplied from (720 km) to more than (3000 km) at 40 Gb/s.
Volume: 20
Issue: 3
Page: 1325-1331
Publish at: 2020-12-01

A narrative 3-phase 9-level voltage source inverter

10.11591/ijpeds.v11.i4.pp1866-1871
M. Selvaperumal , D. Kirubakaran
A tale technique for a 3-stage nine-level voltage source inverter utilizing sixteen switches is presented. The given system utilizes ordinary 3-stage scaffolds of two-level as a diode braced model. A DC interface voltage is provided so that the fell H-connect produces the nine voltage levels. The exchanging designs are expressed as the levels expand then the example is hard to create three-stage yields with key balance procedures. Here an answer for an a-level inverter to create required voltage-level with less power electronic parts by setting up in the look-into tables. This investigation diagrams the correlations between nine-level voltage source inverters in various arrangements and proposed novel, sixteen switch three-stage inverter structured with a smaller number of intensity electronic parts and reenacted in MATLAB/Simulink.
Volume: 11
Issue: 4
Page: 1866-1871
Publish at: 2020-12-01

Voltage harmonics reduction in single phase 9-level transistor clamped H-bridge inverter using nearest level control method

10.11591/ijeecs.v20.i3.pp1725-1732
Nurul Ain Mohd Said , Wail Ali Ali Saleh , Wahidah Abd Halim
This paper proposes a nearest level control method based modulation scheme for a 9-level symmetrical Transistor Clamped H-bridge (TCHB) inverter. The topology has gained increasing research focus due to its advantages in obtaining high quality output while using a reduced number of electronic components. The device count for obtaining a 9-level output voltage is it uses 10 active switches as compared to the 16 being used in a conventional 9-level cascaded H-Bridge (CHB) inverter. The significant contribution of the research is the development of the NLC modulation technique that operates at the fundamental frequency, thus reducing switching losses, and able to reduce harmonic content significantly. The reduced harmonic content can lessen the power quality problem. The NLC modulation scheme, shows that the overall THD is reduced without the need for filtration. The 50 values of harmonic content will be count that follows the IEEE Standard 519. MATLAB/Simulink based simulations and experimental results obtained from the laboratory prototype of a single-phase TCHB inverter feeding a R load validate the theoretical analyses and effectiveness of the proposed modulation scheme.
Volume: 20
Issue: 3
Page: 1725-1732
Publish at: 2020-12-01

A generalized switching function-based SVM algorithm of single-phase three-leg converter with active power decoupling

10.11591/ijece.v10i6.pp6189-6201
Watcharin Srirattanawichaikul
In this paper, a generalized switching function-based space vector modulation (SVM) algorithm is presented and evaluated to minimize the dc voltage utilization and the ac utility grid current total harmonic distortion. This paper explores the control and modulation techniques of a single-phase three-leg converter with an active power decoupling method, where a generalized SVM algorithm is proposed and evaluated for easy implementation in a digital control platform. The active power decoupling method with the proposed converter can be achieved via dependent control and modulation techniques. The control method is separated into the ac active power control part and the dc power ripple control part, which can maintain a unity power factor at the ac utility grid and reduced the double-frequency ripple power effect on the dc-side. Simulation results validate the performance of the modulation algorithm and its control and demonstrate the feasibility of the proposed power converter, as well as the two mentioned operation modes of the power converter.
Volume: 10
Issue: 6
Page: 6189-6201
Publish at: 2020-12-01

A new space vector modulation technique for quasi Z-source B4 inverter

10.11591/ijpeds.v11.i4.pp1890-1898
Izni Mustafar , Naziha A. Azli , Norjulia M. Nordin
A Quasi Z-Source (qZS) network has been utilized in a B4 inverter topology to provide voltage boosting effect by turning on the upper and lower switches simultaneously which is known as zero shoot-through states. However, the design of a qZS B4 inverter is not as straightforward as adding a qZS LC impedance network to the front-end of a B4 inverter. This is because there is no zero vectors available in a B4 inverter topology to insert the shoot through zero states, as in the case of a B6 inverter. This paper proposes a new Space Vector Modulation (SVM) technique for a qZS B4 inverter. Additional zero vectors have been appropriately added and distributed in the proposed SVM to avoid altering the existing volt-sec per switching cycle for the existing active vectors. The voltage vectors switching placement is carefully designed in order to enable the voltage boosting effect for this topology without altering the initial output voltage. In addition, an approach to compensate the DC-link voltage ripple has also been taken into consideration in its initial calculation to achieve balanced output voltage. The performance of the proposed modulation technique is verified using MATLAB/Simulink. It is shown that by using the proposed modulation technique, there is an overall improvement on the line to line output voltage where by it is able to produce balanced output voltages for the three-phase loads with or without boosting effect.
Volume: 11
Issue: 4
Page: 1890-1898
Publish at: 2020-12-01

Control of hybrid power system based renewable energy generations using PID controller

10.11591/ijpeds.v11.i4.pp1775-1784
Mohamed Regad , M'hamed Helaimi , Rachid Taleb , Ahmed M. Othman , Hossam A. Gabbar
This paper addresses to integrate an optimal Proportional-Integrator-Derivative controller for frequency regulation in an isolated microgrid power system based renewable generation. This autonomous microgrid system is composed of Distributed Energy Sources like wind, solar, Diesel Engine Generator, Fuel Cells system, and two different storage devices such as Battery Energy Storage System and Flywheel Energy Storage System. Optimal tuning of the investigated controller is considered as the main problem to be resolved using the Krill Herd algorithm through an objective function. The obtained results are also accomplished with and without the battery energy storage system. The comparison of system performance shows that the proposed control scheme based Krill Herd Algorithm is better than the Genetic Algorithm in the improvement of system performance.
Volume: 11
Issue: 4
Page: 1775-1784
Publish at: 2020-12-01

Spectrum sensing of wideband signals based on cyclostationary and compressive sensing

10.11591/ijeecs.v20.i3.pp1361-1368
Ali Mohammad A. AL-Hussain , Maher K. Mahmood Al Azawi
Compressive sensing is a powerful technique used to overcome the problem of high sampling rate when dealing with wideband signal spectrum sensing which leads to high speed analogue to digital convertor (ADC) accompanied with large hardware complexity, high processing time, long duration of signal spectrum acquisition and high consumption power. Cyclostationary based detection with compressive technique will be studied and discussed in this paper. To perform the compressive sensing technique, discrete cosine transform (DCT) is used as sparse representation basis of received signal and Gaussian random matrix as a sensing matrix, and then 𝓁1- norm recovery algorithm is used to recover the original signal. This signal is used with cyclostationary detector. The probability of detection as a function of SNR and the probability of false alarm as a function of SNR with several compression ratios and processing time are used as performance parameters. The effect of the recovery error of reconstruction algorithm is presented as a function of probability of detection. Simulation results show that the performance of the system is maintained even at high compression.
Volume: 20
Issue: 3
Page: 1361-1368
Publish at: 2020-12-01

Examining factors that effect on the acceptance of mobile commerce in Malaysia based on revised UTAUT

10.11591/ijeecs.v20.i3.pp1173-1184
Mohammed A. Sabri Alrawi , Ganthan Narayana Samy , Rasimah Che Mohd Yusoff , Bharanidharan Shanmugam , Rajasekaran Lakshmiganthan , Nurazean Maarop , Norshaliza Kamaruddin
This study presents an amended unified theory of acceptance and use of technology (UTAUT) which explores key factors affecting Malaysian consumers ' willingness to accept mobile-commerce. A questionnaire survey has been used to collect information from 400 Malaysian smartphone users using a random stratified sample and analyzed using structural equation modelling (SEM); with the use of Smart PLS 3.0. Results show that acceptance and use of mobile-commerce services can also be predicted by the behavioural intentions of users, whose performance expectancy, efforts expectations, social effects, mobility, personal innovations and perceived trust are significantly affected. From these variables, perceived trust is the most significant determinant that directly affects behavioural intention to use mobile-commerce services in Malaysia. It is then followed by mobility, personal innovation, social influence, performance expectancy then effect expectancy. Facilitating Conditions and moderating variables such as gender, age, education, income, marital status, experience and payment have no significant effect on Behavioral Intention to use mobile-commerce services in Malaysia. In conclusion, this study shows that behavioural intention and the use of mobile commerce services in Malaysia have a direct effect. The study will help dealers to avoid spending thousands of dollars on investments that have little impact on whether the customer is embracing and using mobile-commerce. The study also provides quantified indicators and offers a framework for the understanding of the Malaysia mobile-commerce system. The report concludes with a study of the effects of the research findings and provides recommendations for future research.
Volume: 20
Issue: 3
Page: 1173-1184
Publish at: 2020-12-01

Real-time monitoring and control of flow rate in transportation pipelines using Matlab-based interactive GUI and PID controller

10.11591/ijpeds.v11.i4.pp1767-1774
S. Vijayalakshmi , C. Anuradha , R. C. Ilambirai , Viswanathan Ganesh
In this paper, a Matlab based GUI and Propotinal Integral Dervative (PID) controller is designed to automatically regulate the flow-rate of the circulating fluid. When fluids are transported over long distances, the pressure and flow rate have to be monitored remotely in a control room. Using an HMI or Control Panels the flow rate can be increased or decreased to compensate for pressure drops or disturbances. This paper attempts to demonstrate such an Industrial Control Operation in a scaled-down environment. A Graphical User Interface or GUI is constructed which enables the Operator to monitor, as well as control an electronically actuated Control Valve which can efficiently regulate the flow-rate. Automatic operations have also been implemented using a PID controller algorithm, which tries to track the Set-point in Real-time.
Volume: 11
Issue: 4
Page: 1767-1774
Publish at: 2020-12-01

Biometric and RFID based authentication system for exam paper leakages detection using IoT technology

10.11591/ijeecs.v20.i3.pp1271-1277
J. Ann Roseela , T. Godhavari
Education is the soul of a community; it goes from one generation to another. Exam is the prime responsibility of an educational framework. The reason for an examination is to select talented applicants for multiple positions. Exam is an important aspect of the education system to test students' abilities online and in oral papers. Every year we receive deferred/canceled exam messages due to paper leakage. Therefore, we have come up with a affordable and concise outcome, and we have decided to design and implement the "Exam Paper Leak Protection Framework", which will be a much more secure structure depending on the controller. Together with RFID Reader, Fingerprints sensor, Buzzer, LCD, and Wi-Fi module. First, the university will send a selection sheet to an educational institution "electronic sealed box" known the "electronic control box". Electronic control box is a prototype that can be proposed using controller, and the RTC to display the current date and time. If anybody tries to intrude the box the buzzer will beep and alert message will be send to the university.
Volume: 20
Issue: 3
Page: 1271-1277
Publish at: 2020-12-01

A hybrid control system for investigating a high level of decision in internet of things

10.11591/ijeecs.v20.i3.pp1419-1426
Mohanad Ali Meteab Al-Obaidi , Basim Jamil Ali , Jamila H. Saud , Tole Sutikno
In the modern world, the search started for cheap and efficient operating system sources has begun can converted to civilian ends. Internet of things (IoT) is one of the most realistic applications for remote control and remote management using a wide network. In this paper, a control system is designed and built to manage and control traffic lights and street lighting systems, as well as turning on/off generators in a small virtual environment. This was implemented by designing and building a hybrid electronic circuit that combines the closed-circuit control system and the open circuit system. The closed circuit regulates the system according to the desired condition without operator interaction; while the open circuit operates on demand. This type of a hybrid control system demonstrated its high flexibility by controlling devices and its high efficiency compared to the closed circuit and the open circuit system independently. It also helps reduce the number of maintenance guys and energy consumption as well as the cost
Volume: 20
Issue: 3
Page: 1419-1426
Publish at: 2020-12-01

The impact of sociodemographic factors on academic achievements among high school students in Indonesia

10.11591/ijere.v9i4.20572
Deri Indrahadi , Amika Wardana
This study aimed to examine the effect of sociodemographic, student and school factors on the academic achievement of high school students in Indonesia. Using the cross-sectional survey data from the 2015 Indonesian Family Life Survey (IFLS) particularly involving 1,421 respondents (of the academic performances during their school years), the study run multiple regression analysis to examine the influences of their parents’ sociodemographic, students and other school-related factors on their academic achievements during their school years. As the results, it was revealed that the sociodemographic factors, students and schools predict significantly academic achievement of students in Indonesia. The results provided feedback to students and parents, schools and education policymakers in improving student academic achievement.
Volume: 9
Issue: 4
Page: 1114-1120
Publish at: 2020-12-01

Motor side active power filter for induction motor

10.11591/ijpeds.v11.i4.pp1711-1718
H.V. Gururaja Rao , R.C Mala , Ambika Joshi
Power quality is an important aspect in electrical distribution and utilization systems. Variable frequency drive (VFD) controlled induction motors are widely used in industries. The output current of VFD which is nonsinusoidal is given to the induction motor. This paper proposes a motor side active power filter (MSAPF) so as to provide a pure sinusoidal current to the induction motor. An evaluation of two control strategies has been discussed in this paper i.e. Synchronous Reference Frame (SRF) theory and Instantaneous Reactive Power theory (IRPT) in the generation of the reference signal. These techniques are simulated in MATLAB/SIMULINK environment. These simulations demonstrate the reduction in total harmonic distortion (THD) in the motor current with active filter connected to the motor side.
Volume: 11
Issue: 4
Page: 1711-1718
Publish at: 2020-12-01
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