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31,456 Article Results

Synthesis of SMC algorithms applied to wind generator

10.11591/ijpeds.v12.i1.pp404-412
Houaria Abdelli , Abdelkader Mezouar , Mokhtar Bendjebbar , Kheira Belgacem
The use of the classical (SMC) applied to control of stator’s powers of DFIG, gives the problem of chattering, therefore to avoid this phenomenon a robust algorithm (STSMC) is applied. This paper presents a comparison of conventional SMC with the proposed strategy of STSMC algorithm. The results are obtained using MATLAB and demonstrate stability and robustness of this algorithm.
Volume: 12
Issue: 1
Page: 404-412
Publish at: 2021-03-01

Design of eddy current brake for electric motorcycle braking system

10.11591/ijpeds.v12.i1.pp41-50
Mufti Reza Aulia Putra , Muhammad Nizam , Dominicus Danardono Dwi Prija Tjahjana
Braking systems in motor vehicles generally use a braking system that utilizes friction. The braking performance will decrease caused by using friction rapidly. To overcome this, as an alternative, an electromagnetic braking system can be used by utilizing eddy currents, such as eddy current brakes (ECB). Eddy currents are generated when the rotor pass the magnetic field of the electromagnet. The research aim is to design an ECB system. The performance of the disk design will be determined in this study. The study is about the tendency of the ECB properties. The finite element (FEM) method is used by modeling ECB performance. The experimental results were used to validate the result. The test showed the results of braking using aluminum disk showed the best performance in 12.03 Nm. From these results, the combination of the disks is needed by an appropriate disk design.
Volume: 12
Issue: 1
Page: 41-50
Publish at: 2021-03-01

Soft start-up strategy of pulse-density-modulated series-resonant converter for induction heating application

10.11591/ijpeds.v12.i1.pp258-272
Pavlo Herasymenko , Volodymyr Pavlovskyi
This paper presents a soft start-up strategy of pulse-density-modulated series-resonant converter for induction heating application. The pulse-density modulation (PDM) technique is widely used in converters based on voltage-source series-resonant inverters (SRIs) to control the output current or power. However, during a start-up process, PDM has some disadvantages both in inrush current limiting and providing a zero-voltage switching operation of SRI transistors. In the paper, different PDM techniques are considered and basic moments of PDM using within the start-up process are analyzed. A new soft start-up strategy of PDM converter for induction heating application is proposed. The main features of the proposed strategy include an interleaved or a stepped PDM control, an initial combination of PDM at the beginning of the start-up process, and an operating algorithm during the start-up process. The proposed strategy was verified by a 2.5 kW experimental setup of the pulse-density-modulated interleaved converter with an operating frequency from 50 kHz up to 100 kHz. Experimental results confirm the effectiveness of the proposed start-up strategy and show that the maximum current amplitude within start-up processes exceeds the maximum steady-state current amplitude by no more than 30%.
Volume: 12
Issue: 1
Page: 258-272
Publish at: 2021-03-01

Sliding mode control design of wind power generation system based on permanent magnet synchronous generator

10.11591/ijpeds.v12.i1.pp393-403
Nada Zine Laabidine , Afrae Errarhout , Chakib El Bakkali , Karim Mohammed , Badre Bossoufi
This paper aims to implement a new contribution for sliding mode control (SMC) of permanent magnet synchronous generator (PMSG) for wind systems conversion with track the maximum power point tracking (MPPT) power. The SMC is a very popular approach due to its robustness in dealing with the non-linear electrical power systems. In this work, the application of the SMC control is by using the non lineare model of the PMSG. The objective of this work is to control stator active and stator reactive power, and the voltage-frequency for a better injection into the network. The results obtained show better robustness.
Volume: 12
Issue: 1
Page: 393-403
Publish at: 2021-03-01

Hydrogen electrified railways based shunt hybrid filter

10.11591/ijeecs.v21.i3.pp1291-1298
Ibtissam Bessadet , Hamza Tédjini , Ismail Khalil Bousserhane
This paper presents a proposal to keep the conventional railway system, by creating a secure external independent hydrogen station, with the integration of a parallel hybrid filter to isolate the propagation of harmonics, and the reduction of the current ripple. In modern applicactions hydrogen stations are one of the most important sources of sustainable energy; this has been considered one of the most significant sources of energy, as it has no pollution output. Most current research proposes to integrate the fuel cell into the railway, and this will make it face higher risks such as accidents and vibrations as well as the approach of the storage a system to different people. We research any aspect of the proposed method and we demonstrate the ffect of shunt hybrid filter (SHPF) uses in stopping the propagation of the harmonics to the hydrogen side.
Volume: 21
Issue: 3
Page: 1291-1298
Publish at: 2021-03-01

Design and simulation of stand-alone photovoltaic system supplying BTS in Iraq

10.11591/ijpeds.v12.i1.pp463-473
Saja Mazin Sami , Anas Lateef Mahmood
The problem of power outages is still present in most cities of Iraq as a result of the wars and crises experienced by Iraq and this makes it difficult to provide continuous electric power to the electrical devices. All telecommunications companies, including Zain, Asia cell, etc in Iraq used diesel generators as an alternative source to the national electricity grid, but this will adversely affect the environment and humans as a result of toxic emissions associated with the use of these generators. In this paper, a stand-alone PVsystem was designed and simulated to supply a base transceiver station (BTS) in Iraq. A BTS in Jadriyah, Baghdad with 4.177 kW load power belong to Zain Telecommunication Company was taken as a case study in this paper. The meteorological data of the Jadriyah region were taken from a weather station belong to the ministry of Sciences and Technology in Iraq for the year 2017. The simulation for this BTS was carried out using the Pvsyst simulation program. The financial analysis of the proposed system shows that it has small kWh unit price (0.108 $/kWh).
Volume: 12
Issue: 1
Page: 463-473
Publish at: 2021-03-01

Dynamic simulation of three-phase nine-level multilevel inverter with switching angles optimized using nature-inspired algorithm

10.11591/ijpeds.v12.i1.pp325-333
W. T. Chew , W. V. Yong , J. S. L. Ong , J. H. Leong , T. Sutikno
This paper recommends the use of grasshopper optimization algorithm (GOA), a nature-inspired optimization algorithm, for optimizing switching-angle applied to cascaded H-bridge multilevel inverter (CHBMLI). Switching angles are selected based on the minimum value of the objective function formulated using the concept of selective harmonic minimization pulse width modulation (SHMPWM) technique. MATLAB/Simulink-PSIM dynamic co-simulation conducted on a 3-phase 9-level CHBMLI shows that the CHBMLI controlled using GOA derived switching-angle is able to respond to varying modulation index demand and synthesize an AC staircase output voltage waveform with the desired fundamental harmonic and minimized selected low-order harmonics. Compared to Newton Raphson (NR) technique, GOA is able to find optimum switching-angle solutions over a wider modulation index range. Compared to Genetic Algorithm (GA), GOA is able to find global minima with higher probability. The simulation results validate the performance of GOA for switching-angle calculation based on the concept of SHMPWM.
Volume: 12
Issue: 1
Page: 325-333
Publish at: 2021-03-01

A review of building integrated photovoltaic: case study of tropical climatic regions

10.11591/ijpeds.v12.i1.pp474-488
Mu’azu Mohammed Abdullahi , Abdullahi Abubakar Mas’ud , Ibrahim Abubakar Mas’ud , Jorge Alfredo Ardila-Rey , Firdaus Muhammad-Sukki , Ridoan Karim , Ahmad Shakir Mohd Saudi , Nurul Aini Bani , Asan Vernyuy Wirba
The building integrated photovoltaic (BIPV) system have recently drawn interest and have demonstrated high potential to assist building owners supply both thermal and electrical loads. In this paper, the BIPV technology has been reviewed, in terms of its performance, efficiency and power generation capacity. Specifically, the applications of the BIPV in tropical climate regions have been discussed, together with its prospects and challenges. For these schemes to be implemented in a tropical climatic region, the following issues must be considered: 1) Certain studies must be done relating to electrical load demand, predicted PV output, location of the buildings and its integration and constraints associated with roof design; 2) For the highest energy production from solar PV, the solar collectors need to be with the right tilt depending on the location; 3) Design criteria such as safety, efficiency, durability, flexibility and constructive issues need to be considered; 4) The government of such countries must train electricians and carpenters on PV installations; 5) The BIPV roofing must perform same function as normal roofing materials, such as noise protection, water tightness, insulation and climate protection, and 6) As practiced around the world, these countries must establish design standards for the BIPV.
Volume: 12
Issue: 1
Page: 474-488
Publish at: 2021-03-01

The influence of sorogan method in learning history to increase historical understanding and historical awareness

10.11591/ijere.v10i1.20972
Muhammad Rijal Fadli , Ajat Sudrajat , Aman Aman , Kian Amboro
The purpose of this study was to examine the influence of the sorogan method in history learning to improve students' historical understanding and historical awareness. The research method used a quasi-experimental nonequivalent control group design, and the sampling technique used a cluster sampling with a sample size of 96 students. Collecting data through observation, interviews, and tests of historical understanding and awareness. Meanwhile, data analysis to determine the effect and differences of the sorogan method to increase understanding and historical awareness using the independent sample t-test and N-gain score test. The results showed that there were a significant influence and difference between the two groups, namely the experimental and control classes based on the results of the independent sample t-test, the hypothesis H0 was rejected with a significance value of 0.000<0.05, further strengthened by the results of the N-gain score test which was included in the criteria low and medium. This means that there is an influence and increase from the implementation of the sorogan method on historical understanding and awareness and getting a positive response from teachers and students, because the sorogan method is student-centered, and the teacher acts as tutorship/mentorship.
Volume: 10
Issue: 1
Page: 300-307
Publish at: 2021-03-01

A robust nonlinear control strategy of a PV System connected to the three-phase grid based on backstepping and PSO technique

10.11591/ijpeds.v12.i1.pp612-626
Salma Zouga , Mohamed Benchagra , Abdallah Ailane
This article presents a robust non-linear control technique of the three-phase photovoltaic system. The structure chosen for this PV system is that of two power converters and DC voltage intermediate bus. The two power converters are: the DC-DC converter and the three-phase inverter, which requires two main controllers. These controllers have three main objectives. The first objective is to impose the PV voltage generated by the photovoltaic panel, in order to follow a maximum reference voltage provided by the MPPT block. The second one is to maintain the DC link voltage to a constant value, in order to optimize the transfer of energy between the two power converters. The last objective is to inject a three-phase sinusoidal current into the grid, while respecting a unit power factor. With the intention to achieve these three objectives, we designed cascading nonlinear controllers by using the technique of non-linear backstepping control in the synthesis of these two controllers, based on the Lyapunov function, with regard to maximise the PVG output voltage, in order to have a unitary power factor at the grid side. In order to regulate DC-link voltage, we developed an integral proportional controller (PI) with parameters that are optimized by the Particle Swarm Optimization (PSO) method. The robustness of the controller designed approach is tested by a simulation in MATLAB/Simulink software, that improves the performances of each controller whatever conditions of climate.
Volume: 12
Issue: 1
Page: 612-626
Publish at: 2021-03-01

Fuzzy logic control of active and reactive power for a grid-connected photovoltaic system using a three-level neutral-point-clamped inverter

10.11591/ijpeds.v12.i1.pp453-462
Ghrissi Tahri , Zoubir Ahmed Foitih , Ali Tahri
This paper aims to present a fuzzy logic control (FLC) of active and reactive power for a grid-connected photovoltaic system. The PV system is connected to the grid utility using a three-level neutral point clamped inverter (3L-NPC) and LCL filter. Two control strategies, fuzzy logic control, and conventional PI control are applied. The design of the two control strategies is based on calculating the instantaneous active and reactive power from the measured grid voltages and currents to allow the system to have a dynamic robustness performance against a sudden change in reactive power and satisfactory active power tracking under rapid solar radiation changes. The control strategies can transfer the total active power generated by the PV array to the grid utility with high power quality and a unity power factor. The simulation results using the Matlab-Simulink environment show that the FLC strategy has a better dynamic performance with less settling time, and overshoot compared to the conventional PI control.
Volume: 12
Issue: 1
Page: 453-462
Publish at: 2021-03-01

Effects of autoclaving (Pleurotus osteratus) spent mushroom substrate water extract on the minerals, elicitors, cassava yield, and the management of African cassava mosaic virus

10.11591/ijaas.v10.i1.pp13-19
Samuel Okere , Anthony Eromosele Ataga
Farmers all over the world spend millions of dollars to partially control plant diseases that attack their crops using agrochemicals that pollute the environment. Plant diseases reduce crop yield, quality, and shelf life. Enhancing the inherent ability of plants to resist diseases using elicitors and minerals is one of the neglected, sustainable, low-cost, and environmentally friendly approaches to ensure the continued supply of food and fiber. Therefore the aim of this paper is to evaluate the composition of the elicitors and minerals in autoclaved and unautoclaved water extract of Pleurotus osteratus spent mushroom substrate and the effects of its application on the management of African cassava mosaic virus (ACMV), growth, and yield of cassava. The treatments for this investigation comprised Pleurotus osteratus water extract spent mushroom substrate (POWESMS), Pleurotus osteratus autoclaved spent mushroom substrate (POAWESMS), and untreated cassava plants as control. The mineral compositions and the elicitors in the treatments were evaluated using standard procedures. The data generated were subjected to analysis of variance (ANOVA) at (p=0.05). The results obtained from this investigation revealed significant differences in the values of resistant elicitors and minerals. Significant differences were also recorded for the growth, yield parameters, and disease severity evaluated at 4 weeks intervals. The results showed that unautoclaved water extract performed significantly better than the autoclaved in reducing African cassava mosaic disease (ACMD) severity which did not translate to higher crop yield.
Volume: 10
Issue: 1
Page: 13-19
Publish at: 2021-03-01

Simulation and manufacturing of modified circular monopole microstrip antenna for UWB applications

10.11591/ijaas.v10.i1.pp70-78
Bilal S. Taha , Hamzah M. Marhoon
Ultra-wideband (UWB) technology is one of the most promising wireless communication solutions to be developed quickly because of the high-speed data, wide bandwidth and excellent immunity to multipath interference. In this work, the compact design of a modified circular monopole microstrip antenna is simulated and manufactured for the UWB applications. The simulation process of the proposed antenna was done based on the finite integration of the computer simulation technology (CST) microwave studio (MWS). The proposed antenna comprises a copper radiating patch, Roger’s Kappa-438 substrate, and a single stub act as a reflector. The simulation results showed a reasonable agreement with the results of the measurement and good performance was achieved in the range from 1.8 to 10 GHz with VSWR less than 2.0.
Volume: 10
Issue: 1
Page: 70-78
Publish at: 2021-03-01

Design and analysis of double stator HE-FSM for aircraft applications

10.11591/ijpeds.v12.i1.pp51-58
Hassan Ali , Erwan Sulaiman , Mahyuzie Jenal , Irfan Ali , Laili Iwani Jusoh , Zarafi Ahmad , Mohd Firdaus
The main objective of aerospace industry is to produce all electric aircraft (AEA) equipped by electrical devices in coming developments. Electrical machines that provide higher torque densities are gaining more interest for researchers to obtain sustainable direct-drive electrical propulsion system for aircraft applications. In addition to lesser weight and higher torque density, a machine should be “fault tolerant” to applied in aerospace applications. A novel machine for high starting torque, identified as flux switching machine (FSM) was established over the last decade. FSMs comprise all effective sources on stator including robust rotor structure. These machines exhibited higher “torque-to-weight ratios” and reliability. Nonetheless, the challenge of developing a machine suitable for aircraft applications goes far beyond electromagnetic design and much deeper into the field of mechanical systems than traditional ones. Thus, a new double stator (DS) hybrid excitation (HE) FSM design employing segmented rotor is proposed and analyzed in this research work. The suggested design for DS HE-FSM comprises of six field excitation coils (FECs) and six permanent magnets (PMs) as their excitation sources. In this research, investigation of DS HE-FSM is accomplished with respect to flux linkage, back EMF, cogging torque and torque analysis based on 2D FEA.
Volume: 12
Issue: 1
Page: 51-58
Publish at: 2021-03-01

Impact of distributed generation on the Nigerian power network

10.11591/ijeecs.v21.i3.pp1263-1270
Taiwo Fasina , Bankole Adebanji , Adewale Abe , Isiaka Ismail
Distributed generations (DG) are being installed at increasing rates, both in developed and developing countries. The increasing number of DG connected to the distribution system could have a significant impact on the power system operation. This paper presents a case study investigating the impact of grid-connected DG on the Nigerian power network in terms of bus voltages and network losses. The results showed that without DG, some of the bus voltage magnitudes of the test system were outside the permissible voltage limit of 0.95pu≤Vi≤1.05p.u. However, with DG connected, the voltage magnitudes were improved to allowable values. The network active power loss was reduced by 12.03% from 85.60MW to 75.30MW. In this way, the power system becomes more efficient and secured.
Volume: 21
Issue: 3
Page: 1263-1270
Publish at: 2021-03-01
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