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28,593 Article Results

Impacts of Embedded Generation on Distribution Network Behavior

10.11591/ijres.v7.i2.pp91-103
Puladasu Sudhakar , Sushama Malaji , B. Sarvesh
This paper explores the impacts of multiple embedded generators penetration on distribution system behavior. For this rationale, a IEEE-13 bus distribution feeder was modeled and investigates by assimilating different types of embedded generation (EG) sources. Different scenarios were implemented in which WIND, SOFC FUEL CELL, SOLAR and MICRO TURBINE plants were modeled with high variability of load and generation to observe their impacts on system’s protection, unsymmetrical faults also consider observing impacts effectively. To eradicate the impacts on distribution system with presence of EG’s and distribution system undergone in the event of faults, in this paper primarily reverse power due to EG integration is estimated and sensed with reverse power relay, Further two types of Superconducting Fault Current Limiters Passive resonance CB (PRCB) SFCL and Inverse current injection CB (I-CB are proposed and results are compared for amended solution in mitigating fault current magnitude and over voltages, Finally penetrations levels are computed mathematically and All the modeling and simulations were carried out using MATLAB SIMULINK tool.
Volume: 7
Issue: 2
Page: 91-103
Publish at: 2018-06-30

Harmonic Mitigation for Non-Linear Load using TSH Active Power Filter with PID Controller

10.11591/ijape.v7.i2.pp159-165
Garima Sinha , Pankaj kumar Goswami , Sudhir kr. Sharma
Electronic equipments, widely used in present living era, required to have improved power quality. When such type of equipments are connected to electric supply distribution system, they introduce non sinusoidal effect in the line current because of their non-linear relationship in voltage and current. Moreover, harmonics in the line current are also produced. With constantly growing imploration of such type of nonlinear equipments at a large scale, harmonic distortions in line current have become a significant crunch. This required some methods involving the reduction of harmonics in the line current as well as Power Factor Improvement/Correction. The primary goal of this proposed work is to reduce the harmonics produced in line current and to improve power quality of non-linear load by designing a converter with parallel processing scheme, named TSH Active power filter (Transformer less shunt active power filter) with PID controller. Here a separate dc source is employed to supply the shunt connected converter, a voltage source inverter, to remove the requirement of bulky transformer at supply end. This paper depicted the process of reduction of total harmonic distortion (THD), generated due to nonlinear characteristics of load and power factor improvement by shunt compensation. The proposed designs are modeled and simukated using Matlab simulation software.
Volume: 7
Issue: 2
Page: 159-165
Publish at: 2018-06-06

Micro Hydropower System Design for Gua Kelam Electricity Supply

10.11591/ijape.v7.i2.pp120-128
Mamoud A. M. Albreem , Rosnita Md Aspan
Sufficient and uninterrupted electricity supply is one of the main factors to develop the country. Today, electricity can be generated using a variety of sources, whether from non-renewable sources as well as renewable resources. To generate electrical power, Malaysia can't rely entirely on non-renewable resources such as petroleum and coal as these are finite resources which are experiencing depletion around the world. Electricity generated from renewable sources such as water, particularly from micro hydropower systems is considered the cheapest and most environmentally friendly source of electrical energy. Based on the reconnaissance study conducted, the streams of flowing water in Gua Kelam have the potential to yield about 34.29 kW of electricity power, based on the head height of 27 m and flow rate 0.216 m3/s. In this paper, a model for an ordinary micro hydropower facility has been proposed. It links various electromechanical equipment consisting of a hydraulic turbine governor, and a synchronous generator. The modeling was executed to design a micro hydropower system as an alternative source of supply of electricity to Gua Kelam, Perlis. The proposed model was tested by placing a three-phase fault to earth for the purpose of testing the reliability of the system. With the selection of an appropriate control system, the proposed model is very suitable for the development of micro hydropower system at a potential site such as Gua Kelam.
Volume: 7
Issue: 2
Page: 120-128
Publish at: 2018-06-06

Analysis of Six-Phase Interior Permanent Magnet Synchronous Machines for Optimal Parameter Considerations

10.11591/ijape.v7.i2.pp139-146
Tanmoy Dey , Amit Kumar Chowdhury , Sk Mehboob Alam , Surajit Mondal
Understanding the merits of six-phase interior permanent magnet synchronous machines (IP-MSMs) over their three-phase counterparts, this paper analyses the six-phase machine for optimal parameter and performance considerations. Initially, a mathematical model of the six-phase IPMSM is developed employing the dq-axis theory and performance predicted by the model is verified under identical operating conditions with those using a machine designed and tested through finite element analysis (FEA). The developed and verified machine model is then employed to exclusively derive the relation between various machine parameters in order to obtain optimum flux weakening region in the six-phase IPMSM. Thereafter, the equations derived on the basis of maximum torque per ampere (MTPA) control theory are analyzed to understand the effect of various parameters and variables in influencing the machine’s performance in the ‘constant torque’ region and ‘constant power’ region, power output capability, a ratio of reluctance torque to magnet-assisted torque with changes in the stator current vector etc. This is the contribution of this paper.
Volume: 7
Issue: 2
Page: 139-146
Publish at: 2018-06-06

An Enhanced Control Strategy for the Stable Operation of Distributed Generation during Grid-Connected and Islanded Mode

10.11591/ijape.v7.i2.pp147-158
Suman Khichar , Yatindra Gopal , Mahendra Lalwani
The incident of islanding occurs while the distributed generator fed constant power into the grid after power flow on the source of essential utility has been intermittent. If islanding is not rapidly detected, it can reason serious security and harmful condition.  This paper presents coordinated manage of solar photovoltaic unit through maximum power point tracking technique to make available voltage and frequency support for an islanding condition. In normal condition, structure works as constant current control mode subsequent to islanding the structure switched to voltage control mode. The projected technique is capable to discriminate involving an islanding and a non-islanding occurrence. In this paper phase locked loop detection technique designed for detecting islanding situation is conceded out. The authentication of proposed system is established efficiently using MATLAB/ Simulink environment. The simulated results exhibit that the islanding detection technique has zero nondetection zone property and be able to detect islanding within few seconds
Volume: 7
Issue: 2
Page: 147-158
Publish at: 2018-06-06

Music Emotion Classification based on Lyrics-Audio using Corpus based Emotion

10.11591/ijece.v8i3.pp1720-1730
Fika Hastarita Rachman , Riyanarto Sarno , Chastine Fatichah
Music has lyrics and audio. That’s components can be a feature for music emotion classification. Lyric features were extracted from text data and audio features were extracted from audio signal data.In the classification of emotions, emotion corpus is required for lyrical feature extraction. Corpus Based Emotion (CBE) succeed to increase the value of F-Measure for emotion classification on text documents. The music document has an unstructured format compared with the article text document. So it requires good preprocessing and conversion process before classification process. We used MIREX Dataset for this research. Psycholinguistic and stylistic features were used as lyrics features. Psycholinguistic feature was a feature that related to the category of emotion. In this research, CBE used to support the extraction process of psycholinguistic feature. Stylistic features related with usage of unique words in the lyrics, e.g. ‘ooh’, ‘ah’, ‘yeah’, etc. Energy, temporal and spectrum features were extracted for audio features.The best test result for music emotion classification was the application of Random Forest methods for lyrics and audio features. The value of F-measure was 56.8%.
Volume: 8
Issue: 3
Page: 1720-1730
Publish at: 2018-06-01

Mediation Role of Locus of Control on the Relationship of Learned-helplessness and Academic Procrastination among College Students in Penang, Malaysia.

10.11591/ijere.v7i2.12597
Kususanto Prihadi , Christine Y.H. Tan , Reimy T.S. Tan , Poh Ling Yong , Jonathan H.E Yong , Sharvini Tinagaran , Chee Leong Goh , Yu Jin Tee
This study aims to study the mediation role of locus of control on the impact of learned helplessness on students’ academic procrastination. Studies reported that more than 70% university students procrastinate, and one of the causes is the perception that one is vulnerable or helpless in finishing the procrastinate tasks. It was hypothesized that internal locus of control iLOC can reduce the effect if the learned helplessness (LH) on academic procrastination. Data was collected from 60 university students by utilizing instruments such as Duttweiller’s Internal Control Scale, Pure Procrastination Scale (adapted for academic setting) and Learned Helplessness Scale. Multiple regression with Process add-on showed that full mediation occurred; the prediction of LH on procrastination became insignificant when iLOC is controlled. In other words, when students believe that they are in control of their events, the less likely they will procrastinate doing their tasks due to helpless feeling.
Volume: 7
Issue: 2
Page: 87–93
Publish at: 2018-06-01

Performance Study of Enhanced Non-Linear PID Control Applied on Brushless DC Motor

10.11591/ijpeds.v9.i2.pp536-545
Mohamed Shamseldin , Mohamed Abdel Ghany , Abdel Ghany Mohamed
This paper presents an enhanced nonlinear PID (NPID) controller to follow a preselected speed profile of brushless DC motor drive system. This objective should be achieved regardless the parameter variations, and external disturbances. The performance of enhanced NPID controller will be investigated by comparing it with linear PID control and fractional order PID (FOPID) control. These controllers are tested for both speed regulation and speed tracking. The optimal parameters values of each control technique were obtained using Genetic Algorithm (GA) based on a certain cost function. Results shows that the proposed NPID controller has better performance among other techniques (PID and FOPID controller).
Volume: 9
Issue: 2
Page: 536-545
Publish at: 2018-06-01

Improvement of Fading Channel Modeling Performance for Wireless Channel

10.11591/ijece.v8i3.pp1451-1459
Inaam Abbas Heider
Fading channel modeling is generally defined as the variation of the attenuation of a signal with various variables. Time, geographical position, and radio frequency which is included. Fading is often modeled as a random process. Thus, a fading channel is a communication channel that experiences fading. In this paper, the proposed system presents a new design and simulate a wireless channel using Rayleigh channels. Rayleigh channels using two approaches (flat and frequency-selective fading channels) in order to calculate some path space loss efforts and analysis the performance of different wireless fading channel modeling. The results show that the bite error rate (BER) performance is dramatically improved in the value of signal to noise ratio (SNR) is equal to 45dB. Finally, the experimental results show that the proposed method enhances the performance of fading channel modeling by reducing the error of BER when the SNR is reduced also. Moreover, the more accurate model is Rayleigh model which can be considered for developing fading channel model.
Volume: 8
Issue: 3
Page: 1451-1459
Publish at: 2018-06-01

MPPT Control for Wind Energy Conversion System Based on a T-S Fuzzy

10.11591/ijpeds.v9.i2.pp811-819
Abdennasser Benkada , H. Chaikhy , M. Monkade
In this paper, we focus on the modeling and control of a wind power system based on a Permanent Magnet Synchronous Generator (PMSG). We proposed a technique of control strategies to have the maximum power from wind turbine (WT). This study deals with the problem of Maximum Power Point Tracking (MPPT) based on Takagi Sugeno fuzzy model. The stability analysis is achieved. The gains of the designed controller are calculated by solving Linear Matrix Inequality (LMI). Finally, simulation results are provided to demonstrate the validity and the effectiveness of the proposed method.  
Volume: 9
Issue: 2
Page: 811-819
Publish at: 2018-06-01

Electronic Toll Collection System based on Radio Frequency Identification System

10.11591/ijece.v8i3.pp1602-1610
Raed Abdulla , Aden Abdillahi , Maythem K. Abbas
This papaer entitled electronic toll collection system based on Radio Frequncy Identification System explained in detail based on current issue at toll collection system. There are some obstacles faced every day where the users spent their valuable time in queue at tollgate due to traffic congestion as well as using traditional manual method in most existing toll ETC system to collect toll from road users. Besides that, the barrier design where each vehicle stop waiting until barrier lift which consider source of time delay. To tackle stated problems, an electronic toll collection system is proposed which based on RFID technology. The integrated system consists of two main sections, electronic sides where all input data received from while database management office is where all necessary information stored. To compare the current ETC system, in this research elaborated internet of things where all data transmit through cloud and then to the main office in real time. Not only that, there is some enhancement based on barrier design where, gate is remained open for all vehicles with sufficient tags without requiring to stop to eliminate time delay.By check system throughput compare to existing toll systems, various tests have been carried out in different method where proposed system throughput much higher percentage the current system.
Volume: 8
Issue: 3
Page: 1602-1610
Publish at: 2018-06-01

Phase-Shifted Full-Bridge Zero Voltage Switching DC-DC Converter Design with MATLAB/Simulink Implementation

10.11591/ijece.v8i3.pp1488-1497
Oladimeji Ibrahim , Nor Zaihar Yahaya , Nordin Saad
Design of phase-shifted full bridge zero voltage switching DC-DC converter has been very challenging due to circuit parasitic effect on the system dynamics. This paper presents steady-state analysis and iterative approach for the systemic design of phase-shifted full bridge DC-DC converter with improved dynamic performance and satisfactory operational requirement in terms of zero-voltage switching range, operating switching frequency and switching resonance. A 3 kW DC-DC converter is designed using the iterative design approach and the system dynamics performance was investigated in the MATLAB/Simulink environment. The converter zero-voltage switching simulation results were satisfactory with 90% efficiency under full load condition.
Volume: 8
Issue: 3
Page: 1488-1497
Publish at: 2018-06-01

0.5 GHz-1.5 GHz Bandwidth 10W GaN HEMT RF Power Amplifier Design

10.11591/ijece.v8i3.pp1837-1843
Shiva Ghandi Isma Ilamaran , Zubaida Yusoff , Jahariah Sampe
With the current development in wireless communication technology, the need for a wide bandwith in RF power amplifier (RF PA) is an essential. In this paper, the design and simulation of 10W GaN HEMT wideband RF PA will be presented. The Source-Pull and Load-Pull technique was used to design the input and output matching network of the RF PA. From the simulation, the RF PA achieved a flat gain between 15dB to 17dB from 0.5GHz to 1.5GHz. At 1.5GHz, the drain efficiency is simulated to achieve 36% at the output power of 40 dBm while the power added efficiency (PAE) was found to be 28.2%.
Volume: 8
Issue: 3
Page: 1837-1843
Publish at: 2018-06-01

High Gain Non Isolated DC-DC Step-up Converters Integrated with Active and Passive Switched Inductor Networks

10.11591/ijpeds.v9.i2.pp679-689
M. Al Mamun , Golam Sarowar , Md. Ashraful Hoque , Mehedi Azad Shawon
High gain dc-dc step up converters have been used in renewable energy systems, for example, photovoltaic grid connected system and fuel cell power plant to step up the low level dc voltage to a high level dc bus voltage. If the conventional boost converter is to meet this demand, it should be operated at an extreme duty cycle (duty cycle closes to unity), which will cause electromagnetic interference, reverse recovery problem and conduction loss at the power switches. This paper proposes a class of non-isolated dc-dc step up converters which provide very high voltage gain at a small duty cycle (duty cycle < 0.5). Firstly, the converter topologies are derived based on active switched inductor network and combination of active and passive switched inductor networks; secondly, the modes of operation of proposed active switched inductor converter and combined active and passive switched inductor converter are illustrated; thirdly, the performance of the proposed converters are analyzed mathematically in details and compared with conventional boost converter. Finally, the analysis is verified by simulation results.
Volume: 9
Issue: 2
Page: 679-689
Publish at: 2018-06-01

Text Mining for Pest and Disease Identification on Rice Farming with Interactive Text Messaging

10.11591/ijece.v8i3.pp1671-1683
Edio da Costa , Handayani Tjandrasa , Supeno Djanali
To overcome pests and diseases of rice farming, farmers always rely on information and knowledge from agricultural experts for decision making. The problem is that experts are not always available when the farmers need and the cost is quite high. Pests and diseases elimination is hard to be done individually since the farmers are lack of knowledge about the pest types that attack the rice fields. The objective of this study is to build a knowledge-based system that can identify pests and diseases interactively based on the information that has been told by the farmers using SMS communication services. The system can provide a convenience way to the farmers in delivering pests and disease problem information using a natural language. The text mining method performs tokenizing, filtering and porter stemming that used to extract important information sent by a SMS service. The method of Jaccard Similarity Coefficient (JSC) was used to calculate similarities of each pest and disease based on symptoms that are sent by the farmers through SMS. The corpus database usedin this study consists of 28.526 root words, 1.309 stop wordsand 180 words list. Pest and disease database reference in this study was obtained from the Ministry of Agriculture and Fisher (MAF) Timor-Leste. The result of the experiment shows that the system is able to identify the symptoms based on the keywords identified with the accuracy of 81%. The result of pest and disease identification has the accuracy of 86%.
Volume: 8
Issue: 3
Page: 1671-1683
Publish at: 2018-06-01
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