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INDONESIA
Indonesian Journal of Electrical Engineering and Computer Science
Published by Institute of Advanced Engineering and Science
ISSN : 25024752     EISSN : 25024760     DOI : -
Core Subject :
Arjuna Subject : -
Articles 9,226 Documents
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Maintenance and Safety Requirements of Flameproof and Intrinsically Safe Equipment for Coal Mines B. Ahirwal; Arvind kumar singh; Rajendra kumar vishwakarm
Indonesian Journal of Electrical Engineering and Computer Science Vol 6, No 1: April 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v6.i1.pp9-15

Abstract

In the generation of the new technology segment, new explosionproof (Ex) equipment are being installed to make systems suitable for use in hazardous areas of mines. Generally, 80-90% equipment having flameproof (Exd) and intrinsic safety (Exi) methodology of protection are used in the mines for safe operation. The maintenance and safety are two vital parameters to improve the system efficiency of installation in the mines. These parameters are also responsible for the productivity of the mines. The minimum breakdown and maximum safety are the prime concerns of the mines to increase the production. Many observations and basic knowledge are necessary of safety parameters of Ex protections while doing maintenance because micro joules energy is sufficient to ignite the hazardous areas of mines. Trained and skilled personals having good knowledge of Ex protections are required to maintain the limitations of ignition energy sources of Ex equipment to prevent explosion in the mines. A regular and organized scheme of inspection and maintenance may ensure continued, satisfactory and safe operation of Ex electrical equipment in mines. The important points for safety and maintenance of Exd and Exi equipment are pondered in this paper.
Analysis of an energy storage sizing for grid-connected photovoltaic system Aimie Nazmin Azmi; Norhafiz Salim; Aziah Khamis
Indonesian Journal of Electrical Engineering and Computer Science Vol 16, No 1: October 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v16.i1.pp17-24

Abstract

This paper present on the analysis of an energy storage sizing for a small grid-connected PV system.  This project is to study the proper sizing of energy storage (battery) in a grid-connected PV system for consumers whom purchase and sell electricity from and to the utility grid. The goal is to minimize the total cost of the operation for a consumer with a PV system with a battery storage system. This is to make sure that minimizing the total annual operating cost while maintaining an efficient system. This study uses typical consumer load consumption, and solar irradiance data throughout a year, while varying the type of battery storage (study lead acid and Lithium ion battery) as an energy storage for a similar system. Since lithium ion is not the main options to be integrated with PV system, this study will then reveal the data in terms of cost on why it is not a popular choice.
Mechanical Smoke Exhaust in Underground Transport Passage of Hydropower Station Angui Li; Yeqiu Wu; Jiangyan Ma; Ran Gao; Jiang Hu
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 5: September 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In this paper, the fire scenario occuring in the main transformer hall of an underground hydropower station is taken as an example of the mechanical smoke exhaust effect in the transport passage when the smoke spilled from the fired main transformer hall is analyzed by means of theoretical analysis, experiment and FDS simulation. Firstly, the mathematic correlations regarding the mechanical exhaust rate are derived through theoretical analysis. Secondly, a series of experiments are conducted to investigate the smoke spreading in the transport passage under different mechanical exhaust rates, and the same smoke spreading processes are simulated using FDS. By comparing the results of theoretical analysis, experiments and FDS simulations, it is showed that the mechanical exhaust rate prescribed in the regulation of China is adequate for the transport passage of main transformer under a main transformer hall fire. DOI:http://dx.doi.org/10.11591/telkomnika.v10i5.1269 
An Application of Fuzzy Analytic Hierarchy Process Evaluation Yan Chen; Ke Li; Minmin Huang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 12: December 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Unlike previous studies on political risk and Outward Foreign Direct Investment (ODI) that used macro-level ODI data to make analysis, this paper uses of firm-level data to study the relationship between political risk and ODI from institutional distance perspective. This paper builds a relative political risk evaluation system between home country (China and US) and host country (Russia) by Fuzzy Analytic Hierarchy Process (FAHP). We find that relative political risk strengthens China's ability of investing in Russia, and weakens US's. This paper argues that firms that desire investing in high political risk countries should cultivate their relative political risk advantages for their overseas investments. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3813
Magnetic Resonance Imaging Fusion by 3D Compactly Supported Shearlet Transform Chang Duan; Qihong Huang; Shuai Wang; Xuegang Wang; Hong Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

T2* and Quantitative Susceptibility Mapping (QSM) Magnetic Resonance Imaging (MRI) volume provide different type inner structure information of scanned organs. If they can be properly fused into one volume, the details of the organ can be more clearly revealed. In this paper, a 3D MRI volume fusion method based on 3D Compactly Supported Shearlet Transform (3D-CSST) and 3D Dual Tree Compactly Supported Shearlet Transform (3D-DT-CSST), is proposed, which can overcome the limitation, loss of inter layer correlative information, of conventional 2D image fusion methods. 3D-DT-CSST is our modification of 3D-CSST, which is approximate shift invariant. It can improve the performance of fusion method. The proposed method is evaluated by 4 groups of MRI volumes of human brains. The experiment suggests the proposed method has a better performance than conventional 2D wavelet, 2D DT-CWT and 3D wavelet, 3D DT-CWT based fusion methods, and 3D-DT-CSST based method is better than 3D-CSST based method. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.4268
Specific Index Parameters definition for Quantitative Evaluation of the Dynamic Performance of the Electromagnetic Mechanism Topologies within Controllable Actuators LOU Jie; SUN Bin; LI Qingmin
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 2: February 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Fast electromagnetic drive mechanism shows broad application prospects in many areas, but there is still a lack of unified evaluation parameters as to evaluate the dynamic characteristics due to diversity and complexity of the mechanisms. Three interrelated evaluation parameters are presented for topology analysis, namely the electromagnetic force sensitivity coefficient, the initial time constant and the sensitivity contribution coefficient. The specific parameters based evaluation can provide a basis for structural performance assessment as well as topology optimization. Comparison between the dynamic parameters of the discoid repulsion mechanism and the solenoid thrust mechanism shows that, the discoid one is superior to the solenoid one. The proposed research is to establish a general methodology for topology analysis and optimization of the electromagnetic mechanisms. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2066
Protection Of Sequence and Communication Technology Equipment Using Smart Grid Application Archenaa J; E. A. Mary Anitha
Indonesian Journal of Electrical Engineering and Computer Science Vol 9, No 3: March 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v9.i3.pp616-618

Abstract

This paper investigates the merger of energy utility circuits with that of the data and correspondence innovation (ICT) gear under the keen matrix and the security suggestions that this postures, and figures out what is the most extreme voltage that ICT hardware, composed as per IEC 62368-1 can specifically get to control framework circuits. The coming of the keen lattice, the modernization of the power framework utilizing current data and correspondence innovation methods, alongside the expansion of electric vehicle frameworks to the matrix, guarantees to change the business in uncommon manners. In this paper will be utilized as a part of this paper for deciding the level of security of ICT gear must be built to keeping in mind the end goal to be conveyed in higher-voltage application.
Multistage artificial immune system for static VAR compensator planning S. C. Mohd Nasir; M. H. Mansor; I Musirin; M. M Othman; T. M Kuan; K. Kamil; M. N Abdullah
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 1: April 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v14.i1.pp346-352

Abstract

Interconnected network of transmission and distribution lines lead to losses in the system and weakening the voltage stability in the system. Installing Static VAR Compensator (SVC) in power system has known to improve the system by minimizing the total loss and improve the voltage profile of the system. This paper presents the application of Multistage Artificial Immune System (MAIS) technique to determine optimal size of SVC. The performance of this technique is tested on the IEEE 14-Bus Reliability Test System (RTS). The optimization results show that the proposed Multistage Artificial Immune System (MAIS) technique gives better solution of SVC compensator planning problem compared to single stage Artificial Immune System (AIS) in terms of lower total system loss and improved minimum voltage magnitude.
A Method of Friction Disturbance Compensation Based on Velocity Feedback Jianwen Zhao; Shengrong Fan
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The friction disturbance influences servo system in follow-up performance directly, active compensation for the friction disturbance can improve the servo performance. The current compensation algorithms have some disadvantages, such as the complication of algorithms and the high requirement on hardware. In this paper, we propose a new method based on velocity observer. By this method, analytic solution of compensation voltage can be obtained aim to friction disturbance. The method is validated by comparing the results between simulation and experiment. This method has advantages of low requirement on hardware and simple algorithm. It is easy to be applied in practice and provides reference to other servo system for compensation of disturbance. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2810
Improved storage area network method for backup approach Sarmad K. Ibrahim; Saif A. Abdulhussien
Indonesian Journal of Electrical Engineering and Computer Science Vol 17, No 3: March 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v17.i3.pp1493-1498

Abstract

Storage Area Network (SAN) could be a dedicated storage network which carries the info between servers and storage devices. SAN offers flexibility to implement and share data between servers and remote devices instead of the traditional method that reduced the performance of service. This paper improves SAN backup method to increase the CPU utilization and reduce the load on the link; the result shows that the improved method is better than of traditional in terms of response time in FTP about 36% while the traffic data is about 3%.

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