Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

2.567

P-Index

This Author published in this journals

All Journal Jurnal Teknik Elektro Majalah Ilmiah Teknologi Elektro TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Populasi Edukasi Islami: Jurnal Pendidikan Islam NUSANTARA : Jurnal Ilmu Pengetahuan Sosial IJITEE (International Journal of Information Technology and Electrical Engineering) Jurnal Ilmiah Al-Hadi Fitrah: Journal of Islamic Education Journal of English Language and Education Unram Journal of Community Service (UJCS) At-Tadbir : Jurnal Manajemen Pendidikan Islam Educate: Jurnal Ilmu Pendidikan dan Pengajaran Jurnal Nasional Teknik Elektro dan Teknologi Informasi Jurnal Rekayasa elektrika JIM: Jurnal Ilmiah Mahasiswa Pendidikan Sejarah Riwayat: Educational Journal of History and Humanities Majalah Ilmiah Teknologi Elektro

Tumiran

Department Of Electrical Engineering And Information Technology, Faculty Of Engineering, Universitas Gadjah Mada

Author-ID : 205882

Religion Arts Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences Other

Published : 29 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3

Model Arrester SiC Menggunakan Model Arrester ZnO IEEE WG 3.4.11 Halomoan Sinaga, Herman; Haryono, T.; , Tumiran
Jurnal Teknik Elektro Vol 5, No 1 (2005): MARET 2005
Publisher : Institute of Research and Community Outreach

Arrester model is needed to analyse the insulation coordination in power system. The model should give a suitable respon for varying transient fault. In this paper, we conduct simulation that modified from IEEE WG 3.4.11 model. The model is modified by insert a switch that voltages dependent. Arrester modeling respons then compare to the laboratory testing result, with SiC 12 kV arrester sample. Testing conduct with time front varying from 1.2 to 29.7 s with magnitude 51 kV, 52.5 kV dan 54 kV. The difference between simulation and laboratory testing was 4.332 % for sparkovervoltage and 3.259 % for residual voltage discharge current Abstract in Bahasa Indonesia : Model arrester sangat dibutuhkan untuk menganalisis koordinasi isolasi dalam suatu sistem tenaga listrik. Model arrester yang dibuat harus memberikan tanggapan yang sesuai untuk semua kondisi gangguan transient. Dalam makalah ini dihasilkan simulasi dengan menggunakan model yang dimodifikasi dari model IEEE WG 3.4.11. Model ini dimodifikasi dengan menambahkan saklar yang dipengaruhi tegangan. Hasil yang didapatkan dari pemodelan kemudian akan dibandingkan dengan pengujian di laboratorium terhadap arrester SiC 12 kV. Pengujian dilakukan dengan surja tegangan dengan waktu muka 1.2 sampai 29.7 s dan puncak tegangan diberikan sebanyak 3 tingkatan, 51 kV, 52.5 kV dan 54 kV. Perbandingan hasil pengujian dan simulasi memberikan perbedaan sebesar 4.332 % untuk tegangan potong dan 3.259 % untuk tegangan residu arus pelepasan. Kata kunci: Model Arrester, Arrester SiC, Respons Transient.

Electrical Tracking Formation on Silane Epoxy Resin under Various Contaminants Abdul Syakur; Hamzah Berahim; Tumiran Tumiran; Rochmadi Rochmadi
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 11, No 1: March 2013
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v11i1.878

Contamination at the surface of the insulator becomes a serious problem. Especially for the tropical area, humidity and rainfall play an important role in wetness by the water at the insulator surface, which result in the presence of contaminant and leakage current flowing at the surface. This leakage current will generate heat which occurs at the surface of an insulator. This ultimately leads to flashover. This paper presents the influence of contaminants to leakage current and formation of electrical tracking at the surface of epoxy resin compound wit silicon rubber. The test was based on IPT method with NH4Cl as contaminants. The industrial and coastal contaminants are used to explain the effect of contaminant at surface tracking process. The flow rate of contaminant was 0.3 ml/min. The 3.5 kV AC high voltage 50 Hz was applied to the top electrodes. It is found that industrial contamination resulting in the smallest surface leakage current is 327.6 mA. Also it is found that coastal contaminant showed the severest damage at surface of test sample. Therefore, special treatment of the sample is needed under these conditions so that the material performance can be improved, especially against the electrical tracking.

The Damage of ZnO Arrester Block Due To Multiple Impulse Currents Tarcicius Haryono; K. Tunggul Sirait; Tumiran Tumiran; Hamzah Berahim
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 1: April 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i1.685

A lightning arrester installed in an electrical power system is designed to protect some electrical equipment against damage due to lightning impulse strike. However, if there is a multiple impulse current striking a lightning arrester, it may damage the lightning arrester itself and then, as a result, it cannot provide lightning protection to the electrical equipment anymore. In this research, three peak values of lightning impulse current,which were 600, 1300, and 2500A, each of which had 5 repetitive impulse current, was applied to a 5000A (1p.u.) ZnO block of a 24kV nominal voltage lightning arrester having seven ZnO block units. The results of research showed that by applying impulse current of the order of 600(0.12), 1300(0.26), dan 2500(0.5) A(p.u.), making the ZnO block damage as much as 26.58, 50, and 100% concecutively. In addition, the damage of the ZnO block appeared as permanen low value of residual voltage as low as more than 5% of the new ZnO block residual voltage. If the ZnO block is still being used in a lightning arrester in electrical power system, it may result in the opening of a circuit breaker and possibly making electrical power outages from a number of electrical power customers.

Accelerated Aging Effect on Epoxy-polysiloxane-Rice Husk Ash Polymeric Insulator Material Tumiran Tumiran; Arif Jaya; Hamzah Berahim; Rochmadi Rochmadi
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 10, No 4: December 2012
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v10i4.853

The performances of outdoor polymeric insulators are influenced by environmental conditions. The use of polymeric materials in a particular composition can be produced insulators that are resistant to environmental influences. This paper presents the effect of artificial tropical climate on the hydrophobicity, equivalent salt deposit density (ESDD), surface leakage current, flashover voltage, and surface degradation on epoxy-polysiloxane polymeric insulator materials with rice husk ash (RHA). Test samples are made at room temperature vulcanized (RTV) of various composition of epoxy-polysiloxane with rice husk ash as filler. The aging was carried out in test chamber at temperature from 50oC to 62oC, relative humidity of 60% to 80%, and ultraviolet (UV) radiation 21.28 w/cm2 in daylight conditions for 96 hours. The experiment results showed that the flashover voltage fluctuates from 34.13 kV up to 40.92 kV and tends to decrease on each variation of material composition. The surface leakage current fluctuates and tends to increase. Test samples with higher filler content result greater hydrophobicity, smaller equivalent salt deposit density, and smaller critical leakage current, which caused the increase of the flashover voltage. Insulator material (RTVEP3) showed the best performance in tropical climate environment. Artificial tropical aging for short duration gives less effect to the surface degradation of epoxy-polysiloxane insulator material.

Power Oscillation Damping Control using Robust Coordinated Smart Devices Tumiran Tumiran; Cuk Supriyadi Ali Nandar; Sarjiya Sarjiya
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 1: April 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i1.646

The lack of damping of the electromechanical oscillation modes usually causes severe problems of low frequency oscillations in interconnected power systems. In the extreme operating conditions, PSS may fail to damp power oscillation. This paper presents a robust coordinated design of power system stabilizer (PSS) and thyristor controlled series capacitor (TCSC) to damp power oscillation in an interconnected power system. The inverse additive perturbation is applied to represent unstructured uncertainties in the power system such as variations of system parameters, system generating and loading conditions. In addition, genetic algorithm is employed to search a robust tuning to the controller parameters of both PSS and TCSC simultaneously. Simulation studies have been done in a single machine infinite bus system to confirm that the performance and robustness of the proposed controller are superior to that of the conventional controller.

Kebijakan Pertamina dalam Perdagangan Minyak Indonesia (1969–2015) Sukusen Soemarinda; Yeremias T. Keban; Muhadjir Darwin; Tumiran Tumiran
Populasi Vol 26, No 2 (2018)
Publisher : Pusat Studi Kependudukan dan Kebijakan, Universitas Gadjah Mada

Pertamina has a long history of oil trading and was influenced by the actors seizing for the power. The first oil shipments was held in 1958, while this research only discussesPertamina oil trading from 1969 to 2015 through a special subsidiary which was established to carry out the trading for almost fifty years since it was still named as Perta Group (1969) until Petral (2015). The purpose of this research is to know how Pertamina oil trading policy was specified and implemented over a period of time and parties affecting the process so rent- seeking and corruption happened throughout the history of Pertamina oil trading. The method of research a descriptive qualitative method of case study. The data was collected from various documents and interview of perpetrators related. Based on the research carried out, Pertamina oil trading from Perta Group (1969) until Petral (2015) could be classified into three periods, i.e. Perta Group period (1969-1978), POML period (1978-1998), and Petral (1998-2015). The first and second period occurred under the authority of the New Order government, while the third period under the reformation periodThe first period was characterized by the domination of military interests and the second period influenced by the interests of inner circle and family business related to the ruler of the New Order and the third period was dominated by the influence of powerfull person/company.

PENGARUH PENAMBAHAN KARET SILIKON TERHADAP SUDUT KONTAK HIDROPOBIK DAN KARAKTERISTIK ARUS BOCOR PERMUKAAN PADA BAHAN RESIN EPOKSI Abdul Syakur; Ika Novia; Sarjiya Sarjiya; Tumiran Tumiran; Hamzah Berahim
Jurnal Teknologi Elektro Vol 9, No 2 (2010): (July - December) Majalah Ilmiah Teknologi Elektro
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1314.974 KB)

Currently, polymer materials such as epoxy resin have been used as an insulator in the distribution andtransmission line. Some advantages of using this epoxy resin material having the dielectric properties are better thanporcelain and glass insulators. On the other side, epoxy resins are also disadvantage the surface is hygroscopic. Forthe repair was done by adding the surface properties of silicone rubber materialThis paper describes the effect of adding silicone rubber against contact angle of hidrophobicity and surfaceleakage current characteristics of epoxy resin materials ( Di-Glycidyl Ether of Bisphenol A (DGEBA) andMethaphenylene-Diamine (MPDA). The study was conducted in the laboratory using the electrode method IEC587:1984 with NH4Cl contaminants. The voltage applied to the epoxy resin sample at 3.5 kV and 50 Hz frequencyThe experimental results showed that the addition of silicon rubber in epoxy resin makes the surface materialcontact angle increases. The higher percentage of silicone rubber, the greater the contact angle and the longer timerequired for the occurrence of surface discharge.

Design of a Low Cost High Efficiency Multiple Output Self Oscillating Flyback Converter Yogi Sawitra; Prapto Nugroho; Eka Firmansyah; Wahyu Dewanto; Rudy Hartanto; Tiyono Tiyono; Tumiran Tumiran
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 1, No 2 (2017): June 2017
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

The use of some integrated circuits in an SMPS circuit are the main factor that increasing the cost. Self-oscillating feedback converter topology is a well-known circuit topology for low-cost application without using any single integrated circuit chip. In this paper, a Low Cost with high efficiency converter without any single integrated circuit component was analysed and designed. It has also multiple outputs of 3.3 V/1 A, 5 V/0.5 A, and 12 V/0.1 A so that it can be used as power supply for DVD player. Experiment results showed that it can deliver continuously output voltage as designed and a total output power of 7.3 W, with an efficiency for about 70%.

Fault Location Algorithm for HVDC Transmission Based on Synchronized Fault Time Kristianto Adi Widiatmoko; F. Danang Wijaya; Tumiran Tumiran
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 3, No 2 (2019): June 2019
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

To determine the fault location of the dc line fault in an HVDC transmission system, a new algorithm based on the traveling wave method and learning based method is proposed in this paper. The relationship between the traveling wave time of arrival differences with fault location is presented. The differences in traveling wave time of arrival measured at both ends of transmission line combined with associated fault locations form a fault pattern which is used to perform a simple calculation in order to determine the disturbance location. The fault current for different fault locations is simulated using the electromagnetic transient simulation software EMTDC/PSCAD. Performance of the proposed fault location algorithm is investigated using various fault location and resistance. The impact of data sampling rate also being investigated here. The simulation result shows that the proposed algorithm can reduce the sampling frequency and the number of train feature with the same accuracy.

Peningkatan Stabilitas Transien pada Turbin Angin Berbasis DFIG Menggunakan SFCL tipe Bridge Doane Puri Mustika; Sasongko Pramono Hadi; Mokhammad Isnaeni B; Mohd. Brado Frasetyo; Tumiran
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 11 No 4: November 2022
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jnteti.v11i4.5031

Today’s electrical energy is mainly produced by burning fossil fuels, which actually has negative effects on earth, namely global warming. In the electricity sector, measures that can be taken to reduce emissions include replacing conventional generators with renewable ones. Wind energy is one type of new renewable energies (NREs) with the potential to reduce emissions. Wind turbines widely used today are variable speed wind turbines, such as the doubly-fed induction generator (DFIG). DFIG has numerous advantages, like having more flexibility and being able to control both active and reactive powers. However, it often encounters instability problems in its system when experiencing transients. Therefore, a solution that can improve transient stability in DFIG is needed. The bridge-type superconducting fault current limiter (SFCL) was used in this research as a solution to improve the transient stability in DFIG, which consisted of two diodes and two inductors. This bridge-type SFCL operates by limiting the current in the event of faults, preventing the system from voltage drops or trips. The simulation results were analyzed under two circumstances. In the first circumstance, the 9 MW DFIG wind turbine system which was given faults using SFCL produced a voltage value of 219 V, with a more stable frequency value of 50 Hz, and an active power value of 9 MW. Meanwhile, when a system that did not use SFCL was given faults, the voltage dropped from the normal state of 219 V to 100 V. The frequency value was less stable, fluctuating between 49.75 Hz and 50.25 Hz, while the active power dropped from 9 MW to 6 MW. This result proves that the bridge-type SFCL method effectively increases the transient stability in DFIG.

Co-Authors Abdul Syakur Agustia, Nanda Rahayu Agustin, Dewi Arif Jaya Azhar, Abdul Izul Azhari, Faiza Bahtiar Siregar Cuk Supriyadi Ali Nandar Danny Abrianto Doane Puri Mustika Eka Firmansyah Ependi, Rustam F. J. Nangoy, F. J. Faiza Azhari Fransisco Danang Wijaya Fredy J. Nangoy Hamzah Berahim Hamzah Berahim Hamzah Berahim Hannum, Latifah Herman Halomoan Sinaga Ihsyan, Hakimah Ika Novia Ismaraidha J Mandey John E. G. Rompis Jola J.M.R. Londok K. Tunggul Sirait Khalistiasari, Rubi Yohana Kristianto Adi Widiatmoko Laihad, J. T. Lubis, Sakban Manshuruddin, Manshuruddin Mardinsyah, Aziz Marista, Refi Mohd. Brado Frasetyo Mokhammad Isnaeni Bambang Setyonegoro Muhadjir Darwin Muhammad Yunan, Muhammad Nanda Rahayu Agustia Nasution, Napsiah Nofianti, Rita Panggabean, Hadi Saputra Prapto Nugroho Rahayu, Sinta Ramadhani, Siti Rangkuti, Charles Riza Rahma, Riza Rizky, Nanda Rochmadi Rochmadi Rochmadi Rochmadi Rudy Hartanto Saragih, Siti Sahrapmahita Sarajar, C. L. K. Sarjiya Sasongko Pramono Hadi Setiawan, M. Rizki Sirait, Syarifuddin Siregar, Bahtiar Sitorus, Panca Abdini Sukusen Soemarinda T. Haryono Tarcicius Haryono Tiyono Umat, Hardakwah Wahyu Dewanto Yeremias T. Keban Yogi Sawitra

Title

Found 29 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 29 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 29 Documents
Search