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All Journal International Journal of Electrical and Computer Engineering TEKNIK Transmisi: Jurnal Ilmiah Teknik Elektro Jurnal Sains Materi Indonesia TRANSIENT: Jurnal Ilmiah Teknik Elektro Semantik Jurnal Momentum Proceeding of the Electrical Engineering Computer Science and Informatics
Agung Warsito
Jurusan Teknik Elektro, Fakultas Teknik, Universitas Diponegoro Jl. Prof. Sudharto, Tembalang, Semarang, Indonesia
Computer Science & IT Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Other

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Optimisasi Kinerja Pencahayaan Buatan Untuk Efisiensi Pemakaian Energi Listrik Pada Ruangan Dengan Metode Algoritma Genetika Juningtyastuti Juningtyastuti; Agung Warsito; Fanny Hadisusanto
Jurnal Momentum ISSN 1693-752X Vol 13, No 2 (2012): Volume 13 No 2 Agustus 2012
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1760.633 KB)

Abstract

Energi listrik sangat bermanfaat bagi kehidupan manusia, namun energi listrik juga dapat membahayakan keselamatan manusia. Salah satu pemanfaatan energi listrik adalah untuk pencahayaan buatan. Jika hanya dari kuantitas cahaya, pencahayaan yang berlebihan tidak akan menjadi lebih baik bagi penglihatan manusia (mata). Pencahayaan yang baik harus memperhatikan kuantitas, kualitas pencahayaan yang ditentukan dari tingkat refleksi cahaya dan rasio pencahayaan pada ruangan. Selain itu juga harus memperhatikan efisiensi konsumsi energi listrik,dengan tetap memperhatikan intensitas penerangan pencahayaan buatan dan efisiensi daya listrik pada ruangan tersebut. Penulis mencoba melakukan penelitian pada ruang laboratorium dengan pencahayaan buatan menggunakan metode Algoritma Genetik, untuk mendapatkan kinerja pencahayaan buatan sehingga dapat menekan efisiensi energi listrik yang digunakan secara optimal. Dari hasil pengujian dan simulasi menunjukkan bahwa pada ruang laboratorium dengan lampu TL sebanyak 16 buah memberikan nilai intensitas penerangan 250,132 lux, dan efisiensi pemakaian energi listrik adalah 3,1289 watt/m2 .
A Comparisson of Synchronous and Nonsynchronous Boost Converter Mohamad Isnaeni Romadhon; Trias Andromeda; Mochammad Facta; Agung Warsito
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 3: EECSI 2016
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (767.174 KB) | DOI: 10.11591/eecsi.v3.1135

Abstract

Modern electronic systems require resources with high efficiency. The efficiency of direct current to dicrect current converters as a power source can be increased by replacing a diode with MOSFET. The use of MOSFET is expected to reduce power loss as the internal resistance of MOSFET is lower than a diode. To implement the propossed idea, a boost type direct current chopper and TL494 as PWM generator circuit were applied in this work. MOSFET is used in synchronization mode to replace diode at conventional topology of chopper.. The proposed circuit and conventional topology were made and their performance were observed. The efficiency of both circuit were compared and analyzed. The result of the experiments showed that the efficiency of converter within MOSFET at synchronization mode is proportional with the increment of duty cycle, while at conventional topology the efficiency remain stable at any duty cycle. Synchronous boost converter is more efficient than nonsynchronous boost converter at duty cycle over than 40%.
Geometrical Shape Investigation for Electrodes in Silent Discharge Chamber Mochammad Facta; Ngurah Ayu Ketut Umiati; Agung Warsito
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 3: EECSI 2016
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (634.287 KB) | DOI: 10.11591/eecsi.v3.1153

Abstract

Silent discharge is the most prominent method to carry out plasma reaction because. discharge is easily initiated by injecting alternating current in high voltage to the pair of separated electrodes. The electron emission from surface of dielectric placed on instantaneous cathode is stimulated by ion induced electron emission. In this method, spark is avoided by placing insulation material to either one or both of the electrodes. In practical, it is very difficult to determine the exact limit of the voltage that initiate the discharge by mathematical analysis because it depends on many factors, namely dimensions, type and geometrical shapes of electrode, thickness of insulation, and type of electric field inside the discharge gap. To get lower initial voltage for discharge, it is important to find the best geometrical shape of electrode in relation to skin effect that trigger electron emission. This work investigates the behaviour of charges, current, electric field and voltage surrounding electrodes with various geometrical shape.Silent discharge is the most prominent method to carry out plasma reaction because. discharge is easily initiated by injecting alternating current in high voltage to the pair of separated electrodes. The electron emission from surface of dielectric placed on instantaneous cathode is stimulated by ion induced electron emission. In this method, spark is avoided by placing insulation material to either one or both of the electrodes. In practical, it is very difficult to determine the exact limit of the voltage that initiate the discharge by mathematical analysis because it depends on many factors, namely dimensions, type and geometrical shapes of electrode, thickness of insulation, and type of electric field inside the discharge gap. To get lower initial voltage for discharge, it is important to find the best geometrical shape of electrode in relation to skin effect that trigger electron emission. This work investigates the behaviour of charges, current, electric field and voltage surrounding electrodes with various geometrical shape.
STUDY ON SURGE ARRESTER PERFORMANCE DUE TO LIGHTNING STROKE IN 20 KV DISTRIBUTION LINES Agung Warsito; Abdul Syakur; Liliyana N.S.
TEKNIK Vol 30, No 3 (2009)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (609.811 KB) | DOI: 10.14710/teknik.v30i3.1886

Abstract

Electric energy has been transmiting from power station to end user with transmission and distribution lines.Lightning strokes are problems that occure in transmission and distribution lines and make them fault when theelectric energy were transmited. Surge Diverter or Lightning Arrester has been installing to reduce these faults.In this paper the simulation of lightning stroke and lightning arrester performance on distribution lines 20 kVwere done using EMTP (Electromagnetic Transient Program). Some parameters such us impuls voltage andincreasing voltage on distribution line was inverstigated. As case study in this simulation, Mojosongo 1 mainfeeder 20 kV three phase lines were used.The simulation results show that the lightning stroke 20 kA in By1-61-61E-84-9I on S phase at 0,1 ms, makevoltage on S phase was increased about 1,3054 MV. For R phase and T phase will increase of induced voltagewere 0.79539 MV and 0.80484 MV. We also show the performance of MOV Arrester (Metal Oxide Varistor) inovercoming lightning stroke trouble, where arrester can decrease voltage up to 15.198 kV on S phase, while atR phase and T phase arrester can decrease voltage up to 11.375 kV and 13.616 kV.
Co-Authors Abdul Syakur Abdurrahman Ghifari Alvian Dwi Hendrawan Amalina, Lisa Andromeda, Trias Anindita Singgih Pambudi, Anindita Singgih Aswin Iffatyanto Utomo Bakhtiar, Muhamad Marin Bambang Winardi Bernad, Dwaldes Budy Wiryawan Cahyo Ariwibowo Darwiyani, Muhammad Zaenuddin Dhani Wahyu Utama Putra Dinda Hapsari Kusumastuti, Dinda Hapsari Dionisius Vidi Nugraha Donny A.W. Dzakwan, Muhammad Irfan Eko Aptono Tri Yuwono Fajar Kurniawan Fanny Hadisusanto Galuh Susilowati Gigih Mahartoto P Gilang Surya Atmaja Hermawan Hermawan Heru Pujiyatmoko Hidayat, Surya Nur I Ketut Suada Imam Syafi’i Ira Debora Parhusip Isna Joko Prakoso Isnaeni Romadhon, Mohamad Iwan Setiawan J. Jamari Jainudin, Arif Muslih Juningtyastuti Juningtyastuti Juningtyastuti Juningtyastuti Karnoto . Lambang Bagusiam, Thomas Febrian Lie Liliyana N.S. M Anantha B P Meicky Ari Wibowo, Meicky Ari Meigy Restanaswari Kartika, Meigy Restanaswari Mochammad Facta Mochammad Facta Mohamad Isnaeni Romadhon Mohammad Tauviqirrahman Muluk, Nizamul Naibaho, Henri Matius Ngurah Ayu Ketut Umiati Nugroho, Marcellinus Christian Adi Nur Taat Sayekti Nurlailati - Nyoto Susilo Oktarico Susilatama Putra Pradana, Oktarico Susilatama Purnomoaji, Ari Putra, Argianka Satrio Ricky Salpanio Rifky Ismail Ritonga, Seno Yudho Panggayuh S Siswanto Safarul Azmi Sandra Aditya Kurniawan Sriyanto, Nadia Noviarty Sudjadi Sudjadi Sugiyanto Sugiyanto Sugiyanto Susatyo Handoko Tegar Mahardika Tejo Sukmadi Trias Andromeda Vingtsabta, Victorius Veinard Widiyanto, Romualdy