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Transmisi: Jurnal Ilmiah Teknik Elektro
Published by Universitas Diponegoro
ISSN : -     EISSN : 24076422     DOI : -
Core Subject : Education,
Education
Arjuna Subject : -
Articles 433 Documents
 1   2   3   4   5 
ANALISIS KERUSAKAN BATANG ROTOR PADA MOTOR INDUKSI TIGA FASA MENGGUNAKAN METODE MOTOR CURRENT SIGNATURE ANALYSIS Firdhana, Niko Riza; Sukmadi, Tejo; Karnoto, Karnoto
Transmisi Vol 19, No 4 Oktober (2017): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.078 KB) | DOI: 10.14710/transmisi.19.4.168-176

Abstract

Motor induksi digunakan di berbagai bidang karena harganya murah, handal, dan memiliki efisiensi yang tinggi.Salah astu penggunaan motor induksi adalah pada unti pembangkit listrik. Motor induksi dapat mengalami kegagalan karena proses penuaan dan bebagai faktor lain yang berkaitan dengan pola operasi. Salah satu kegagalan motor induksi disebabkan oleh rusaknya batang rotor.Untuk mengurangi kegagalan motor induksi diperlukan adanya condition monitoring untuk melihat kondis dan performai motor induksi. Salah satu metode yang digunakan dalam condition monitoringadalah Motor Current Signature Analysis (MCSA). Metode ini melakukan pendekatan sinyal arus stator untuk mendeteksi side band frequency di sekitar terminal sumber. Penelitian  ini merancang desain GUI yang berisi analsis kondisi batang rotor menggunakan metode MCSA, persentase keseimbangan arus dan tegangan untuk menganalisis kondisi motor induksi yang ada di PT. PJB UBJOM PLTU Rembang yaitu Medium Speed Mill 20 A dan Medium Speed Mill 20D. Kondisi batang rotor pada kedua motor semakin memburuk seiring bertambahnya beban. Meskipun semakin memburuk, tetapi kondisi keseimbangan arus dan tegagan kedua motor normal karena bearda di bawah 5% dan 10%.
Aplikasi Pengolahan Citra Digital untuk Mengontrol Saklar Berdasarkan Letak dan Warna Huruf Totalis, Herry; Christyono, Yuli; Zahra, Ajub Ajulian
Transmisi Vol 12, No 4 (2010): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (672.793 KB) | DOI: 10.12777/transmisi.12.4.168-175

Abstract

The use of wireless communication system as a communication medium in control system has been getting popular. Sending information is getting easier with wireless network for example internet. SMS technology has also been used in the house as remote control switch, but there are still many weaknesses including user must know the format of SMS text and have trouble when more and more switches are used. Beside location and condition of the switch in the house is not known directly. Therefore we need a system that can control house’s switch by knowing location and condition directly through pictures.The purpose of this final project research is to design and create a tool that can  control switch remotely using wireless communications with the image display’s position of switch so that we can immediately find out controlled switch . Switch condition is analogue with condition of the  microcontroller pin ATmega8535. In this final project the system is divided into two, namely transmitter and receiver. Transmitter section prepares house plans image data that has been processed and then sent to receiver while receiver interprets image data to determine commands to the microcontroller ATmega8535. Condition of switch can be seen on LED that is connected to microcontroller pin. Based on the test results, it is found that installation image character, changing the color of image character and scanning house plans image in accordance with determined run. Command are sent through serial port properly executed by microcontroller. There’s no error that occur during entire course of the program. In using of ad hoc networks have influencing factors  that is the distance, type of laptops and barrier. Keyword :   transmitter, receiver, house plans image, image character, ad hoc network, serial port,  microcontroller ATmega8535
PERBAIKAN JATUH TEGANGAN DENGAN REPOSISI TRAFO UNTUK SAMBUNGAN RUMAH PELANGGAN Winardi, Bambang
Transmisi Vol 20, No 4 Oktober (2018): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.057 KB) | DOI: 10.14710/transmisi.20.4.152-157

Abstract

Sambungan rumah adalah titik akhir dari pelayanan listrik kepada konsumen, sehingga potret pelayanan dapat dilihat dari mutu tegangan dan tingkat keandalan dari sisi sambungan rumah. Dalam hal ini penulis menemukan sebuah kasus nyata sampel di lapangan mengenai sambungan rumah yang tidak sesuai standar yang layak untuk dibahas dan direncanakan solusi perbaikan jaringannya. Jumlah tarikan sambungan rumah yang tidak standar ini menyebabkan tegangan rumah mengalami jatuh tegangan. Hasil pengukuran pada waktu beban puncak adalah 175 V, persentasenya adalah 20,5%. Padahal tegangan jatuh yang diijinkan adalah maksimal 198 V, persentasenya adalah 10%. Dengan melihat keadaan yang terjadi di lapangan, maka direncanakan solusi untuk perbaikan jaringan.Pada pengukuran jatuh tegangan secara langsung berupa 175 V, sedangkan jatuh tegangan dengan menggunakan software ETAP 12.6.0 berupa 168 V. Sedangkan pada rencana perbaikan jaringan, perhitungan yang dilakukan dengan menggunakan software ETAP 12.6.0 diperoleh persentase jatuh tegangan hanya berkisar antara 1,81% - 3,63%.  Pada software ETAP 12.6.0 menunjukkan bahwa rencana perbaikan yang dilakukan sudah memenuhi standar. Hal ini terlihat dari kisaran persetase jatuh tegangan dari 9,09% 22.72% bisa menjadi 1,81% - 3,63%.
Aplikasi Sistem Parkir dengan Automatisasi Pembiayaan Berbasis RFID (Radio Frequency Identification) Velayati Habsyah; Yuli Christyono; Imam Santoso
Transmisi: Jurnal Ilmiah Teknik Elektro Vol 13, No 3 (2011): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.276 KB) | DOI: 10.12777/transmisi.13.3.108-113

Abstract

RFID ( Radio of Frequency Identification ) is technology base on the this wave radio. Technology able to identify without needed direct contact. RFID developed by in the place of barcode technology. Implementation RFID is among other things used for the approximation of last stream - pass by quickly at turnpike, system of applying of application RFID in that library area, and what is more there are also research RFID used for the university student card, library card and polyclinic card, application of transaction of voucher and fingerprint and breach-block electronic at smart home. In this final project, the writer do the simulation program with automatic park system by using RFID (Radio Frequency Identification).It is expected that using this tool, to help in arranging the park field that using auto identification technology which does not need direct contact in the usage. In this final project, besides making the parking transaction easier, RFID also used as the substitution of money during the transaction. This technology also offers safety. The using of RFID in parking managing gives significant advantages if it is compared with Barcode technology. The design starts with RFID to data input in database and will be used turn on LED like supplementary gate park. Examining process the park transaction include enter transaction park and exit transaction park. In the testing stage, the system can work well and it can be shown by RFID reading not a wrong. The output of this system is identified by LED (Light Emitting Diode) supplementary gate park which creates green color if the system is success and red color if the system cannot be continued. Keyword : Barcode, Identification, LED (Light Emitting Diode) ,RFID (Radio Frequency Identification), park system , tag RFID.
PERANCANGAN PEMBANGKIT TEGANGAN TINGGI IMPULS BERBASIS KONVERTER FLYBACK Prakosa, Johanes Nugroho Adhi; Facta, Mochammad; Riyadi, Munawar Agus
Transmisi Vol 17, No 2 April (2015): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (865.268 KB) | DOI: 10.12777/transmisi.17.2.63-69

Abstract

Abstrak Salah satu bentuk  fenomena tegangan tinggi adalah gelombang tegangan tinggi berbentuk impuls. Gelombang impuls tegangan tinggi ini secara teoritik dapat digunakan untuk mekanisne terjadinya surface discharge. Surface discharge adalah fenomena peluahan muatan pada permukaan isolasi padat. Dengan berkembangnya teknologi elektronika daya, tegangan tinggi impuls dapat dibangkitkan. Penggunaan rangkaian flyback dan MOSFET dapat menggantikan rangkaian pembangkit tegangan tinggi impuls konvensional yang dibuat dari trafo dan sela bola sehingga memiliki volume dan berat. Dalam penelitian ini dirancang konverter flyback yang mampu menghasilkan tegangan tinggi impuls. Konverter flyback dipicu oleh IC TL494. Frekuensi osilasi dari IC TL494 mampu mempengaruhi hasil tegangan keluaran konverter flyback. Tegangan suplai konverter flyback adalah 16 V, 24 V, 34 V dan 43 V. Frekuensi osilasi yang digunakan yaitu 1 kHz, 2 kHz, 3 kHz, 4 kHz, dan 5 kHz. Sebagai beban konverter flyback dibuat dua buah plat ozon berbentuk “meander” dan “sisir” yang akan menghasilkan surface discharge khusunya. Ketika diberi beban plat ozon bentuk “meander”, diperoleh tegangan keluaran minimal dan maksimal konverter flyback sebesar 6,98 kV dan 19, 50 kV. Sedangkan untuk plat ozon bentuk “sisir”diperoleh tegangan keluaran minimal dan maksimal konverter flyback sebesar 9,00 kV dan 24,92 kV.   Kata Kunci : Frekuensi osilasi, flyback, tegangan tinggi impuls, surface discharge     Abstract One of high voltage phenomenon is high voltage impulse waveform. High voltage impulse used for surface discharge mechanism. Surface discharge is a discharge phenomenom on the surface of solid insulation. With the development of power electronic technology, high voltage impulse could be generated. Flyback circuit and MOSFET could replaced conventional high voltage impulse generator which created from transformer and air gap. In this project, flyback converter, will be designed. Flyback converter was driven by IC TL494. IC TL494 oscilation frequency could affected the result of converter output voltage. Supply voltage for  flyback converter was 16 V, 24 V, 34 V and 43 V. This project used 1 kHz, 2kHz, 3 kHz,4 kHz, and 5 kHz as oscilation frequency. For flyback converter load, two ozone plates, “meander” and “comb”, were created. They generated surface discharge. When flyback converter was loaded by “meander” ozone plate, it  generated 6,98 kV for minimum value and 19,50 kV for the maximum value. When flyback converter was loaded by “comb” ozone plate, it generated 9,00 kV for minimum value and 24,92 kV for the maximum value.   Keywords : Oscilation frequency, flyback, high voltage impulse, surface discharge
IMPLEMENTASI FUZZY LOGIC CONTROLLER PADA SISTEM PENGEREMAN KERETA API Wahyudi Wahyudi
Transmisi: Jurnal Ilmiah Teknik Elektro Vol 7, No 2 (2005): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12777/transmisi.7.2.9-13

Abstract

Kereta api merupakan salah satu alat transportasi darat yang banyak diminati karena lebih ekonomis, nyaman dan cepat. Pada saat pengereman kereta api berlangsung, sering menimbulkan adanya hentakan yang mendadak, sehingga akan dapat mengurangi kenyamanan.Permasalahan tersebut dapat diatasi dengan melakukan pengaturan pada sistem pengereman, salah satu cara yang dapat dilakukan adalah dengan menggunakan sistem kontrol logika fuzzy. Penggunaan kontroller logika fuzzy dapat mengurangi gaya hentakan yang terjadi pada saat pengereman, tetapi jarak tempuh henti dari saat pengereman lebih jauh jika dibandingkan dengan menggunakan pengereman konvensional.
Simulasi Algoritma Rerouting dan Prosedur Contention Controller pada Sistem Penyambungan ATM Yudhitya Sorrenti; Wahyul Amien Syafei; Imam Santoso
Transmisi: Jurnal Ilmiah Teknik Elektro Vol 11, No 3 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (149.996 KB) | DOI: 10.12777/transmisi.11.3.129-133

Abstract

An ATM (Asyncronous Transfer Mode) switching system is designed to operate at high speeds and can serve a variety of traffic type with quality services. One of the technology could improve the performance of an ATM connection is rerouting algorithm include Controller Contention procedure as the procedure of operation. Rerouting algorithm is an algorithm that is able to overcome the routing conflict at a certain level, and restore the routing according to destination address. Contention Procedure Controller is a controller that is located in the connection element is used to determine the route, can proceed or not. This procedure is found on the rerouting algorithm using Banyan networks that have a single point in the framework of connections in ATM switching. In this research a simulation was designed to simulate the rerouting algorithm both without conflict and with conflict at various levels. Controller Contention Procedure aims to provide a detailed description when conflicts occur in switching elements and the duty to select ATM routing cells based on its RNS value. This procedure should refer to the rerouting algorithm and generate output according to the algorithm. Keywords: rerouting algorithm, Contention Controller, ATM switching, Banyan network.
BOOST-UP CHOPPER 24 V/320 V DENGAN KENDALI PROPORSIONAL-INTEGRAL (PI) BERBASIS MIKROKONTROLLER Suroso, Suroso; Nugroho, Daru Tri; Siregar, Dolly Arthur
Transmisi Vol 18, No 2 April (2016): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (277.89 KB) | DOI: 10.12777/transmisi.18.2.60-64

Abstract

Makalah ini menyajikan pengujian prototip boost-up chopper 24 V/320V DC dengan kendali Proporsional Integral (PI) berbasis mikrokontroller. Mikrokontroller diaplikasikan untuk menghasilkan sinyal kontrol yang mengatur duty cycle untuk menswitch saklar Isulated Gate Bipolar Transistor (IGBT) pada rangkaian chopper. Metode kontrol PI ini juga bekerja untuk memperoleh tegangan output dari boost-up chopper yang lebih stabil. Berdasarkan hasil pengujian secara simulasi komputer dan uji prototip di laboratorium menunjukkan bahwa kontroller dan prototip chopper mampu bekerja seperti yang direncanakan dan mampu menghasilkan nilai tegangan output yang baik dengan margin of error 2,18% dibandingkan dengan target tegangan output 320 VDC.
Sistem Pengendalian Suhu Dan Kelembaban Pada Mesin Pengering Kertas Darjat, Darjat
Transmisi Vol 10, No 2 (2008): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.697 KB) | DOI: 10.12777/transmisi.10.2.82-88

Abstract

An effective and efficient paper drying tool for printing industry is very important. Utilize of this tool is to dry the paper will be printed to get a dry paper that have ideal temperature and humidity level. With the result that will make easier the process of production and to get the optimal quality of printed result.Focus of this Final Report is to design data acquisition humidity level and temperature system control to the paper drying machine based on fuzzy logic control using Atmega 8535 microcontroller, in order to get the paper that have ideal temperature and humidity level is about 33oC – 35.5oC and 41% of water content in 0.00075 inch of thickness for each of the sheet later  (Perry’s Chemical Engineers’ Handbook: 12.34) 10].Observation result of fuzzy logic control in paper drying system show that bigger reference of temperature offered to the system so that the time to reach steady state condition will be more longer, where the initial condition of temperature at the same value. To get the dry ideal paper result, the setting reference of temperature that appropriate is 50oC, where the drying process with 50oC reference is resulted the paper with 38.0oC temperature and 40.9% of humidity.Keyword: Paper drying system, Fuzzy logic control, ATMega 8535 microcontroller
MODIFIED IMPROVED PARTICLE SWARM OPTIMIZATION (MIPSO) SEBAGAI SOLUSI ECONOMIC DISPATCH PADA SISTEM KELISTRIKAN 500 kV JAWA-BALI Kanata, Sabhan; Sarjiya, Sarjiya; Hadi, Sasongko Pramono
Transmisi Vol 15, No 2 (2013): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (634.984 KB) | DOI: 10.12777/transmisi.15.2.66-72

Abstract

Abstrak   Komponen biaya paling besar pada operasi pembangkitan thermal adalah biaya bahan bakar. Permasalahan bagaimana meminimalkan biaya bahan bakar dengan menentukan kombinasi daya output dari masing-masing unit pembangkit dengan kekangan terpenuhinya beban sistem dan batas kemampuan masing-masing unit pembangkit dikenal dengan istilah economic dispatch (ED). Dalam penelitian ini, diusulkan metode Modified Improved Particle Swarm Optimization (MIPSO) dengan pendekatan Contriction Factor Based Particle Swarm Optimization (CFBPSO) Kemudian metode pendekatan ini diterapkan dalam 2 kasus sistem tenaga yaitu pada kasus IEEE 30 bus pada pembebanan 800 MW dan sistem interkoneksi 500 kV Jawa-Bali dengan pembebanan puncak 12058 MW. Dari hasil simulasi IEEE 30 bus,  metode MIPSO dengan pendekatan CFBPSO mampu menghasilkan solusi paling optimal ekonomi dibanding metode pendekatan MPSO dan Quadratic Programing. Untuk kasus sistem interkoneksi 500 kV Jawa-Bali, metode MIPSO dengan pendekatan ini juga mampu memberikan solusi paling optimal dibanding dengan sistem real PT. PLN (Persero).   Kata kunci:   economic dispatch (ED), modified improved particle swarm optimization (MIPSO), sistem interkoneksi 500 kV Jawa-Bali.     Abstract The most substantial component of the operating cost of thermal generation is fuel costs. The problem of how to minimize the cost of fuel to determine the combination of the output power of each generating unit with the fulfillment of load constraint systems and limit the ability of each generating unit known as economic dispatch (ED). In this study, the proposed method Modified Improved Particle Swarm Optimization (MIPSO) approach Contriction Factor Based Particle Swarm Optimization (CFBPSO) then this approach is applied in 2 cases the power system in the case of IEEE 30 bus at loading 800 MW and 500 kV power system Java-Bali with 12058 MW peak load.  The IEEE 30 bus simulation results, the method MIPSO with CFBPSO approach is able to produce the most optimal economic solution than MPSO approach and Quadratic Programming. For the case of 500 kV power system is Java-Bali, MIPSO method with this approach is also able to provide the most optimal solution compared with the real system PT. PLN (Persero).   Keywords: economic dispatch (ED), modified improved particle swarm optimization (MIPSO), 500 kV power system in Java-Bali.

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