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29,939 Article Results

Problems and analysis directions in smart grid technology and their potential solutions

10.11591/ijape.v10.i3.pp207-216
Manoj Saini , Shagufta Khan , Rajeev Gupta , Shivani Singh , Pooja Upadhyay , Shivangi Soni
The idea of smart grid (SG) technology has revolutionized the traditional power system and has made it more efficient, robust and reliable in a number of ways. SG networks are recently upgraded networks of associated objects of information and communication technology (ICT) and core technology. Many active research areas have been developed to achieve the goals and planned requirements of the transfer of power systems from the traditional grid to the SG. Despite the significant characteristics of SG, future research needs to resolve numerous problems relating to core and ICT technology. This analysis paper identifies the challenges facing SG growth, potential research directions and also proposes possible solutions to some of these challenges, thus achieving the SG goals and planned requirements.
Volume: 10
Issue: 3
Page: 207-216
Publish at: 2021-09-01

Assessment of online education problems during the COVID-19 pandemic in Russia

10.11591/ijeecs.v23.i3.pp1689-1698
Ilshat Garafiev , Gulshat Garafieva , Angelika Idiatullina , Elena Spirchagova
The work studied the assessment of online education problems during the COVID-19 pandemic by the first year master’s students. It was hypothesized that there are two types of problems. The first type is the problems associated with the difficulties of online communication between the participants of the educational process. The second type is the problems associated with the technical difficulties of participating in online education. The results of factor analysis show that masters clearly distinguish between the content-related (online communication) and formal (technical problems) sides of the organization of online education. It was found that those masters’ students who do not work now or do not have work experience in the specialty for which they are studying generally perceive the presence of technical problems and Internet disruptions as difficulties in implementing online education more significantly.
Volume: 23
Issue: 3
Page: 1689-1698
Publish at: 2021-09-01

Gender of transformational school principals and teachers’ innovative behavior

10.11591/ijere.v10i3.21448
Aziah Ismail , Nor Shafrin Ahmad , Rahimi Che Aman
The purpose of this paper is to examine the different levels of transformational leadership between male and female principals and their relationships with teachers' Innovative Work Behavior (IWB) in Malaysian secondary schools. In total, 477 teachers from various secondary schools were randomly selected as respondents (218 are working under female principals, while 259 of them are under male principals). This study revealed that the respondents agree that male principals practice transformational leadership higher than female principals. However, the female principals were highly influential on the teachers’ IWB compared to their male counterparts. This study provides a glimpse of the teachers' innovative behavior improvement resulted from transformational leadership by male and female school principals.
Volume: 10
Issue: 3
Page: 747-752
Publish at: 2021-09-01

A new method to incorporate three-phase power transformer model into distribution system load flow analysis

10.11591/ijape.v10.i3.pp262-270
Rudy Gianto , Purwoharjono Purwoharjono
This paper proposes a new and simple method to incorporate three-phase power transformer model into distribution system load flow (DSLF) analysis. The objective of the present work is to find a robust and efficient technique for modeling and integrating power transformer in the DSLF analysis. The proposed transformer model is derived based on nodal admittance matrix and formulated by using the symmetrical component theory. Load flow formulation in terms of branch currents and nodal voltages is also proposed in this paper to enable integrating the model into the DSLF analysis. Singularity that makes the calculations in forward/backward sweep (FBS) algorithm is difficult to be carried out. It can be avoided in the method. The proposed model is verified by using the standard IEEE test system.
Volume: 10
Issue: 3
Page: 262-270
Publish at: 2021-09-01

Ranking of hydropower projects based on sustainability criteria in India using multicriteria decision making methods

10.11591/ijape.v10.i3.pp230-243
Anuja Shaktawat , Shelly Vadhera
Assessment of hydropower projects with respect to sustainability criteria is a multidimensional and a complex issue that decision makers usually face during planning process. In hydropower projects, it is important to consider technical, environmental and social parameters instead of purely economic ones for sustainability assessment and decision making. Multi-criteria decision making (MCDM) methods offer a practical approach to a problem having conflicting criteria. The flexibility to consider several criteria and objectives simultaneously made MCDM methods well accepted in the field of energy planning. This paper aims for applicability of MCDM methods which will facilitate the decision makers to select the most sustainable hydropower projects by making real and logical choices based on various sustainability criteria. For comprehensively rank hydropower projects of Indian region based on sustainability criteria four MCDM methods are applied i.e., analytic hierarchy process (AHP), technique for order of preference by similarity to ideal solution (TOPSIS), preference ranking organization method for enrichment evaluations (PROMETHEE II) and elimination and choice translating reality (ELECTRE III). To ensure better decision making the eight criteria selected are compatible to the sustainable development of hydropower projects.
Volume: 10
Issue: 3
Page: 230-243
Publish at: 2021-09-01

Experimental platform tests for setting performances of distance protection installed in Biskra-Batna of the Algerian transmission line

10.11591/ijape.v10.i3.pp173-182
Yassine Khelil , Belkacem Mahdad , Abdelhak Tobbeche
The modern power system is equipped with protection system based on advanced technology through the use of digital multifunction relay, control system and intelligent selectivity, whose purpose is to ensure maximum security and service continuity of protection relay in the presence of various fault currents. Distance protection is an important protection required in high voltage transmission lines. In this paper, experimental platform tests have been performed and proposed for setting and evaluation the performances of distance protection named Micom P442 installed in Biskra-Batna of the Algerian transmission power system. The performances of the distance protection have been evaluated under various short circuits. In this study, experimental result based single phase fault to ground is analysed and discussed. Experimental results based on the proposed platform tests in terms of precision in detecting faults at various locations and trigger times confirm the efficiency and particularity of the proposed experimental platform tests.
Volume: 10
Issue: 3
Page: 173-182
Publish at: 2021-09-01

Some results on χ-single valued neutrosophic subgroups

10.11591/ijeecs.v23.i3.pp1583-1589
M. Shazib Hameed , Zaheer Ahmad , Salman Mukhtar , Asad Ullah
In this study, we develop a novel structure χ-single valued neutrosophic set, which is a generalization of the intuitionistic set, inconsistent intuitionistic fuzzy set, Pythagorean fuzzy set, spherical fuzzy set, paraconsistent set, etc. Fuzzy subgroups play a vital role in vagueness structure, it differ from regular subgroups in that it is impossible to determine which group elements belong and which do not. In this paper, we investigate the concept of a χ-single valued neutrosophic set and χ-single valued neutrosophic subgroups. We explore the idea of χ-single valued neutrosophic set on fuzzy subgroups and several characterizations related to χ-single valued neutrosophic subgroups are suggested.
Volume: 23
Issue: 3
Page: 1583-1589
Publish at: 2021-09-01

Squirrel cage induction motor predictive direct torque control based on multi-step delay compensation

10.11591/ijape.v10.i3.pp244-252
Najimaldi M. Abbas
The squirrel cage induction motor direct torque control main problems due to torque and large stator flux pulsation. In this an improved model predictive direct torque control algorithm considering multi-step delay compensation is proposed. At each sampling moment, predict the stator flux linkage and torque at the next moment under each voltage vector. The optimal voltage vector deviation from the stator flux linkage reference value and torque reference value are selected as the minimum objective function. Aiming at the problem of one-shot delay in digital control systems, a multi-step predictive delay compensation measure is studied. Simulation shows that the algorithm can effectively reduce torque and stator flux pulsation, reduce current harmonic distortion, and solve the delay problem in digital systems.
Volume: 10
Issue: 3
Page: 244-252
Publish at: 2021-09-01

Calculation and measurement of ampacity for class 5 flexible aluminum cable at 110 °C

10.11591/ijape.v10.i3.pp183-192
Fernando Esma Agustin , Akhtar Kalam , Aladin Zayegh
Class 5 flexible aluminum conductors are not common in cable manufacturing industry due to insufficient study on cable joints and connectors. The table of ampacities for aluminum conductors at 110 °C in AS/NZS3008.1.1 standards are also not available as a reference guide for electrical system designers that restricts the installation of aluminum low voltage (LV) cabling system to operate at 90 °C of conductor maximum operating temperature where 110 °C cables are permitted in Australia. In this paper, the cable ampacities of various LV Class 5 flexible aluminum cables at maximum operating temperature of 110 °C are calculated using IEC60287 and AS/NZ3008.1.1 standards. The calculated ampacities from the formula presented in clause 4.4. of AS/NZS3008.1.1 are verified by using the 6kA inductive current generator to determine the suitability for use. The joint temperature between cable and shear bolt mechanical connectors are simultaneoulsy simulated using the calculated ampacities to determine the suitability of mechanical shear bolt connectors when the coefficient of thermal expansion of material is considered. The observed differences between the calculated and measured values demonstrate the relevance of formula used in determining the current ampacity at 110 °C conductor temperature in free air.
Volume: 10
Issue: 3
Page: 183-192
Publish at: 2021-09-01

A comparative study on AC/DC analysis of an operational low voltage distribution system

10.11591/ijape.v10.i3.pp193-206
Cihan Katar , Cengiz Polat Uzunoglu
In the near future, the digitalizing world will continue to improve and the need for DC based devices will be increased beyond doubt. Today’s electrical grid is strictly dependent on AC-DC rectifiers. Each conversion process means additional power losses and signal quality deteriorations for the network. In addition, networks which are fed by batteries and renewable sources such as solar panels, and wind turbines are suffering from conversion-based power losses. In this respect, the idea of switching to DC on the low voltage side of the networks has become an intriguing subject. In this study, the applicability and efficiency of the low voltage direct current (LVDC) concept for low voltage distribution systems is discussed and a sample LVDC distribution system is analyzed. In this operational residential application electrical transient analyzer program (ETAP) is employed for comparison of different voltage levels such as 110 VDC, 250 VDC, 320 VDC and conventional 220/380 VAC. As a novel approach different DC voltage levels are compared with typical AC system in detail. Comparative analysis is conducted for safety regulations, voltage drops, current carrying capacities, power consumption and harmonic calculation of the proposed system. In this respect applicability, possible drawbacks and future aspects of LVDC systems are interpreted.
Volume: 10
Issue: 3
Page: 193-206
Publish at: 2021-09-01

NARX-based water quality index model of Air Busuk River using chemical parameter measurements

10.11591/ijeecs.v23.i3.pp1663-1673
Muhammad Ierfan Hasnan , Azhar Jaffar , Norashikin M. Thamrin , Mohamad Farid Misnan , Ahmad Ihsan Mohd Yassin , Megat Syahirul Amin Megat Ali
Water quality plays a major role in issues related to public health and marine life. Hence, monitoring river for contaminations is vital for ensuring safe and sustainable water resources. Conventional method for assessing water quality index is costly as it requires considerable amount of time and laboratory resources. Therefore, this study proposes a water quality index model based on artificial neural network. A six-year data for Air Busuk River is obtained from the Department of Environment. Dissolved oxygen, biological oxygen demand, and ammoniacal nitrogen has shown high correlation with water quality index. The water quality index model is then developed based on these parameters, employing the non-linear autoregressive with exogeneous input structure. Generally, the model which is based on three chemical parameters has shown satisfactory performance with overall regression of 0.8767 and passed the correlation function tests. The model offers a potentially efficient method for assessing water quality with cost-saving benefits for government agencies and monitoring authorities.
Volume: 23
Issue: 3
Page: 1663-1673
Publish at: 2021-09-01

Classification of water stress in cultured Sunagoke moss using deep learning

10.12928/telkomnika.v19i5.20063
Yusuf; Universitas Brawijaya Hendrawan , Retno; Universitas Brawijaya Damayanti , Dimas Firmanda; Universitas Brawijaya Al Riza , Mochamad Bagus; Universitas Brawijaya Hermanto
Water stress greatly determines plant yield as it affects plant metabolism, photosynthesis rate, chlorophyll content index, number of leaves, physiological, biochemical compound, and vegetative growth. The research aimed to detect and classify water stress of cultured Sunagoke moss into several categories i.e. dry, semi-dry, wet, and soak by using a low-cost commercial visible light camera combined with a deep learning model. Cultured Sunagoke moss is a commercial product which has the potential use as rooftop-greening and wall-greening material. This research compared the performance of four convolutional neural network models, such as SqueezeNet, GoogLeNet, ResNet50, and AlexNet. The best convolutional neural network model according to the training and validation result was ResNet50 with RMSProp optimizer, 30 epoch, and 128 mini-batch size; this also gained an accuracy rate at 87.50%. However, the best result of the convolutional neural network model on data testing using confusion matrices on different data sample was ResNet50 with Adam optimizer, 30 epoch, 128 mini-batch size, and average testing accuracy of 94.15%. It can be concluded that based on the overall results, convolutional neural network model seems promising as a smart irrigation system that real-time, non-destructive, rapid, and precise method when controlling water stress of plants.
Volume: 19
Issue: 5
Page: 1594-1604
Publish at: 2021-09-01

Industry 4.0 with intelligent manufacturing 5G mobile robot based on genetic algorithm

10.11591/ijeecs.v23.i3.pp1376-1384
Mohd Zarifitri Kasim Hawari , Nur Ilyana Anwar Apandi
A manufacturing fifth-generation (5G) mobile robot is a new development of industry 4.0 application, deploying an unmanned system. This study aims to implement a robot system for industrial applications in real-time with remote sensors to enable humans. Moreover, there is still some obstacle to cope with the better optimization solution for manufacturing 5G robot. This paper proposed a latency network algorithm for the manufacturing 5G mobile robot. An improved genetic algorithm (GA) by restructuring the genes is applied to plan a mobile robot path. The process of the robot path in a complex workspace is proposed, considering the node's collision-free constraint in the moving phase of a robot. The proposed scheme improves the robot path and delivery efficiency of the robot on average at 68% by moving on the industrial environment's shortest path and time average of the mobile robot reach its destination.
Volume: 23
Issue: 3
Page: 1376-1384
Publish at: 2021-09-01

Relationship between sources and manifestations of stress among faculty members in Isabela State University

10.11591/ijphs.v10i3.20832
Helena B. Florendo , Annaliza R. Hernando
Stress is inevitable in any workplace. Stressed teachers in every school are prone to exhaustion and commit errors. In the Philippines, few studies have been discussed due to stress among faculty members, especially in tertiary education. In this study, the researchers shed light on sources, manifestations, and levels of stress, and discovered the relationship between sources and their manifestations among faculty members of the eight colleges of the Isabela State University-Main Campus. Data were randomly collected from 165 respondents, through the Teacher Stress Inventory developed by Fimian. Data revealed that the main sources and manifestations of stress by the respondents were Work-related and Professional Investment, and Fatigue Manifestations. The level of stress among the respondents was moderate. Likewise, the sources and manifestations of stress were found significantly correlated to each other. Results of the study press on the development of a proposed Stress Management Program supportive and essential in managing and coping stress of the faculty member
Volume: 10
Issue: 3
Page: 465-471
Publish at: 2021-09-01

Different soliton pulse order effects on the fiber communication systems performance evaluation

10.11591/ijeecs.v23.i3.pp1485-1492
Mahmoud M. A. Eid , Abd El-Naser A. Mohammed , Ahmed Nabih Zaki Rashed
The study outlined the soliton pulse order effects on the performance efficiency of the optical transceiver systems. The power after fiber is reported for various Soliton pulse order. Max optical signal power (SP) and min optical noise power (NP) are clarified versus time after optical fiber for various soliton pulse order. As well as the max electrical power amplitude against time period is demonstrated after electrical filter for various soliton pulse order. It is reported that the optical transceiver performance efficiency can be upgraded with the first soliton order pulse. The soliton technique is used for high speed communication transmission systems. Soliton technique is used to compensate the dispersion and balanced with nonlinear effects. The soliton order effects is then discussed to choose the suitable soliton order for high speed system performance efficiency. The soliton techniques can be used also for extended ultra high transmion distance with high data rates.
Volume: 23
Issue: 3
Page: 1485-1492
Publish at: 2021-09-01
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