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Foristek
Published by Universitas Tadulako
ISSN : 20878729     EISSN : 25797174     DOI : https://doi.org/10.54757
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering
Foristek is a scientific journal published with the aim of facilitating academics and researchers to publish their research results in the field of Innovation electrical engineering. Journal of the Electrical and Information Engineering Forum (Foristek) is a journal published by the Department of Electrical Engineering, Tadulako University. Foristek began publication on September 2, 2011 and published regularly twice a year in May and November.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 191 Documents
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PERBAIKAN KUALITAS TEGANGAN MENGGUNAKAN DYNAMIC VOLTAGE RESTORER (DVR) Winarso Winarso
Foristek Vol. 3 No. 1 (2013): Foristek
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Abstract

Dynamic Voltage Restorer is one of quality solution methods of electric power that is used to recover drop voltage (sag) by injecting voltage to the network. Injection of minimum power method is minimum active power supplied to the load as compensation of sag. Thus, it can stabilize load voltage. The aim of this research is to maintain voltage magnitude constantly in the sensitive load location, when fault occur. In tackling sag and swell problems, DVR can solve balance and unbalance conditions by injecting appropriate voltage component. Therefore, the normal condition at source voltage can be achieved as soon as possible. DVR Control produces fast and accurate response that lead to an accurate solution increasing quality of electric power system caused by sag. Sag can disturb performance of sensitive equipments. MATLAB-SIMULINK withtoolbox of electric power system will be utilized in simulation process.
EVALUASI PENGARUH CUACA TERHADAP KEANDALAN SISTEM DISTRIBUSI Wahri Sunanda
Foristek Vol. 3 No. 1 (2013): Foristek
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Abstract

System distribution has used 13 of loads with source of generation from substation. It will be simulated on EDSA Technical 2005 in bad weather that occur in system during one month. Probability of bad weather occurance is 8,33%/year with failure rate almost twice than normal condition, about 2000%. The result shows that weather contributes significant influence for reliability of distribution system although the bad weather happened in short time.
SIMULASI DAN ANALISIS ERROR KOMPUTASI FFT WINOGRAD 16-TITIK MENGGUNAKAN XILINX ISE 10.1I Irma Yulia Basri
Foristek Vol. 3 No. 1 (2013): Foristek
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Abstract

Weakness data processing using analog processors are less efficient because if there is an error in the design of a systemusing an analog processor, the hardware of the system should be redesigned. Processing of analog signals using digital processor has several advantages such as efficient and easy to modify the system are made, without requiring hardware redesign as well as in the design of analog systems. Errors in the design of digital circuits in the processor only requires modification program, without having to change the hardware. Modifications can be done anywhere, without demanding we must be in the laboratory. Fast Fourier Transform (FFT) is a computational algorithm that is used for digital data processing such as in the field of image, music, and satellite. Winograd FFT 16 point multiplier, multiplier consists of 6 pieces in the form of fractions. Design of FFT multiplier in Xilinx ISE 10.1i could do with changing fractions menajdi integers and then converted into a number by logic 1 and 0. Changing fractions into an integer will give different computational results compared with the original computation using a multiplier of FFT. The shift results enormous computing will result in lost / loss information can be conveyed from the processed data. To that end, researchers tried to simulate and analyze the computational error rate of 16 point Winograd FFT processor using Xilinx ISE 10.1i. The results showed average percentage error computational simulations using FFT 16 point Xilinx Ise 10.1i compare with Matlab is 6.67% (first trial) and 4:48% (second trial). This error occurs because the processor does not allow the FPGA digital display numbers in a real number.
PERENCANAAN ARSITEKTUR ENTERPRISE SISTEM INFORMASI PADA KANTOR OTORITAS PELABUHAN PENYEBERANGAN (KOPP) DITJEN PERHUBUNGAN DARAT Yasmi Afrizal
Foristek Vol. 3 No. 1 (2013): Foristek
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Abstract

Network Planning and infrastructure development at Kantor Otoritas Pelabuhan Penyeberangan (KOPP) has not reach mature level and causing overlap for Information Technology (IT) investment, unclear goals and it become less optimal. Therefore transportation ministry has to design a blue print of network infrastructure to achieve IT Governance and E – Governance strategy. Scope of this research is to design information system enterprise architecture at land tansportation directorat of KOPP to develop infrastructure for head office. Enterprise Architecture Planning (EAP) is a methode used for designing its infrastructure that has ability to define architecture process to use information for businees supporting and provide plan to implement the architecture. EAP blue print used to build and it helped KOPP to solve problem in architecture information system planning especially for application infrastructure component, data infrastructure and network infrastructure.
PEMANFAATAN USB KONVERTER KE RS-485DAN MIKROKONTROLER AVR ATTINY2313 PADA SISTEM POLLING Maryantho Masarrang
Foristek Vol. 3 No. 1 (2013): Foristek
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Abstract

Almost people in Indonesia ever seen quiz who wants to be millionaire. That quiz is sometimes using a polling method to get the right answer. Audience at studio must help a quiz’s participant by using keypad to get a right answer. Audience must push the button of keypad where there is choice of answers. After that the answer will be display in a bar graph of percent. Thiscalled electronic polling system. With the aim of the research is to design and build a polling system with 6 slave-based serialRS-485, USB and microcontroller RISC and design and build a control system based serial RS-485, USB and microcontroller RISC efficient. The method used in this research is to study the reference, namely collecting materials that can be used as a reference, observation and study references required, inventory problems and needs in the design and manufacture, designand manufacture of hardware, software design and manufacturing, and perform testing. RS-485 is standard for communication with very long cable. This standard can use cable almost 1,2 Km long. RS-485 is very unique, this standard using master slave method. So only the master can control slave. Slave is using a microcontroller to manage data. AVR ATtiny2313 is a goodmicrocontroller for slave. This is microcontroller very small and very fast. Base from design, implementation and test result indication implement of RS-485 at polling system can be handle of case distance between master and slave. Beside that not only one slave can be connected to master
SISTEM DETEKSI DINI BANJIR BERBASIS SENSOR FLOAT MAGNETIC LEVEL GAUGE Fahrul Fahrul; Miranty Miranty; Ambo Asse; Yuli Asmi Rahman
Foristek Vol. 3 No. 2 (2013): Foristek
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Abstract

Central Sulawesi has tropical climate conditions with interconnected rivers caused each of it can experience the impact of the sudden rise of water levels if there is a heavy rainfall in upstream areas which is commonly called “a sent flood”. Therefore, it is needed an early detector flood tool that works based on the height of river water level so that the impact of floods can be minimized. Early detector flood tool can function automatically by giving early warning when water levels reach a certain limit. The detector of height levels of river streams is designed using float magnetic level gauge method. This height level of river streams detector is able to provide information in real time based on the height level of river streams by giving information in the form of warning light indicator and siren alarm as alert and danger sign.
SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN SUPPLIER MENGGUNAKAN METODE ANALYTICAL HIERARCHY PROCESS (AHP) Deny Wiria Nugraha; Wirdayanti Wirdayanti
Foristek Vol. 3 No. 2 (2013): Foristek
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Abstract

Supplier selection is multicriteria problem, since for selecting the supplier who will become partner, decision maker must consider many criteria to measure supplier performance. One of the models that is used to measure supplier performance is Supplier Performance Rating used in Kingston-Warren Corporation. The key aspects related to that model are Quality, Cost and Delivery. One of tools that used by decision maker to select supplier is making a computer system that can interact with decision maker. The system is called Decision Support System (DSS) for supplier selection. The process of supplier selection uses Analytical Hierarchy Process (AHP) model. AHP model conduct supplier selection by making paired matrix comparison from defined criterion. Result of AHP model calculation is in the form of priority value, so that the highest priority value produced by the model is used by decision maker to choose the best candidate supplier.
ESTIMASI PEMBEBANAN TRANSFORMATOR GARDU INDUK 150 KV Elias K. Bawan
Foristek Vol. 3 No. 2 (2013): Foristek
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Abstract

Development of an area, such as Yogyakarta is directly proportional to consumption of power in that area. Transformer of 150 KV Wirobrajan substation, 60 MVA, is one of main equipment in power system. Load forecasting on this research using daily average peak load data during five years that is since 2003 to 2008. Based on the analysis of the result of exponential model approach method, the equation Y = 5.29 e 0.04057X is obtained. By using this model, it is found that average load growth forecasting of the transformer during 2009 to 2025, is suitable to supply 50.89 MVA of load demand (85% of full load). Moreover,model Y = 20.18 + 0.44X1 + 0.07X2 is found using polynomial method. In 2025, the transformer, based on polynomial method,can deliver power 80.07 MVA (about 80.07% of full load). Finally, load current was 230.72 A, in 2025.
PERANCANGAN PROGRAM SIMULASI PERINTAH DASAR JARINGAN KOMPUTER Yuri Yudhaswana Joefrie
Foristek Vol. 3 No. 2 (2013): Foristek
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Abstract

This research is intended to design software that is able to simulate the basic commands of the computer network. Simulation program is planned to serve for people who do not understand about computer networks and have a strong desirelearning the basics of computer networks. The design result of this research is command of ping, telnet, ftp, route, andifconfig. The design of the simulation program also produces 10 units or classes that contain the components of the specificactivity or program.
PENGENDALIAN KECEPATAN MOTOR SINKRON MAGNET PERMANEN (MSMP) TIPE INTERIOR DIATAS KECEPATAN DASAR Muhammad Bachtiar
Foristek Vol. 3 No. 2 (2013): Foristek
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Abstract

This paper presents a method to control Permanent Magnet Synchronous Motor (PMSM) at high speed above the based speed. To control PMSM from zero speed up to base speed, the armature voltage of the motor may be varied up to maximumvoltage allowed of the inverter used. In this region the stator voltage will increases with the increases of motor speed reaches the based speed, motor voltage cannot increase anymore because of saturation and consequently motor speed cannot be increase more highly. In order motor to control the motor above base speed, it is can be done by weakening the field flux of the rotor. As the rotor made of permanent magnet, then filed weakening control cannot be done directly. The control of field-weakening effect is done by controlling stator current vector of direct axix, which is variable with speed

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