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All Journal Buletin Udayana Mengabdi Jurnal SPEKTRUM Majalah Ilmiah Teknologi Elektro PROSIDING CSGTEIS 2013 Journal of Electrical, Electronics and Informatics International Journal of Engineering and Emerging Technology Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Jurnal Indonesia Sosial Sains Majalah Ilmiah Teknologi Elektro Merkurius: Jurnal Riset Sistem Informasi dan Teknik Informatika

I Wayan Sukerayasa

Teknik Elektro Fakultas Teknik Universitas Udayana

Author-ID : 2932556

Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics Social Sciences

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Analisis Prediktif Pemeliharaan Minyak Transformator Menggunakan Metode Markov I.G. Surya Subaga; I.B.G. Manuaba; I.W. Sukerayasa
Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

As one of the main assets that play an important role in the distribution of electricity, the performance of the transformer must be maintained in prime condition. Damage to the transformer insulation oil often causes failure of the transformer. Damage to transformer oil is very difficult to predict, therefore monitoring its condition is very important to do. Dissolved Gas Analysis (DGA) is one og the method to determine the condition of transformer oil, where this method can analyze the condition of the transformer based on the concentration of gas dissolved in oil. A reguler maintenance of transformer oil can prevent the transformer oil from damage or failure of insulation. However, sometimes maintenance is carried out not in a right time that results in a decrease in transformer’s lifetime. In this analysis the value of Total Dissolved Combustible Gas (TDCG) was used to calculate transfomer’s reliability and availability value. Those value then processed using the Markov method to determine the possibilities of proper maintenance time. From the calculation results in this analysis the transformer reliability value in 30 days is 0.886, then the probability of decreasing the reliability value every month is 11.4%. And the value of the availability of the transformer is 0.803 or equal to 293 days. Based on this analysis, in one year the transformer operated properly for 293 days while 72 days the transformer was in an unfavorable condition. So that maintenance should be carried out in 293 days transformer’s condition can be maintained properly.

PENGARUH BEROPERASINYA PLTS KAYUBIHI TERHADAP SUSUT ENERGI DAN KEANDALAN PENYULANG BANGLI Kadek Agus Nata Riadnyana; Ida Ayu Dwi Giriantari; I Wayan Sukerayasa
Jurnal SPEKTRUM Vol 2 No 2 (2015): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (192.961 KB)

Beroperasinya PLTS pada penyulang Bangli menyebabkan perubahan performa pada penyulang Bangli terutama pada susut energi dan keandalan penyulang tersebut. Analisis dilakukan dengan load flow simulation pada software ETAP dengan dua kondisi, yaitu penyulang Bangli tanpa dan dengan PLTS untuk mendapatkan hasil susut daya yang selanjutnya digunakan untuk menghitung susut energi. Analisis keandalan dilakukan untuk mendapatkan parameter SAIFI dan SAIDI. Dengan beroperasinya PLTS, nilai susut energi turun sebesar 31,4% dan keandalan penyulang Bangli menghasilkan nilai SAIFI sebesar 9 kali/2 tahun tanpa PLTS dan 4 kali/tahun dengan PLTS, serta nilai SAIDI sebesar 13,9225 jam/tahun tanpa PLTS dan 11,7963 jam/tahun dengan PLTS.

ANALISIS KEANDALAN DAN SUSUT DAYA PADA PENYULANG VI DI KOTA DILI TIMOR LESTE Miguel Nazario; Rukmi Sari Hartati; I.W. Sukerayasa
Jurnal SPEKTRUM Vol 1 No 1 (2014): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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Kebutuhan energi listrik akan terus berkembang seiring dengan bertambahnya jumlah penduduk serta sarana pendukungnya. Dengan demikian sistem kelistrikan yang sesuai dengan standar sangat diperlukan mengingat gangguan yang sering terjadi maka perlu adanya suatu analisis sistem keandalan dan losses daya pada penyulang VI. Penyulang ini melayani kota Dili yang meliputi Kawasan Caicoli, Audian, BidauMasau, Cristo Rei, LahaneOcidentaldan LahaneOriental. PenyulangVI ini merupakan sistem radial, terdiri dari 39 unit trafo distribusi dengan panjang saluran 17,490 km dan kapasitas bebannya 6440KVA.Untuk mengetahui kondisi sistem distribusi di kota Dili maka dengan bantuan program software EDSA (Electrical System Power Design Software) drop tegangan yang terdapat pada sistem distribusi penyulang VI dapat dianalisis.Drop tegangan terbesar adalah 4.24% yang terjadi pada trafo 26, dengan susut keseluruhan yang terjadi pada penyulang VI adalah sebesar 121,600 KW dan 120,926 KVAR. Serta dari hasil perhitungan yang dilakukan pada penyulang VI maka didapatkan Indeks Keandalan untuk SAIFI (System Average Interruption Frequency Index) adalah; 1,69 pemadaman/pelanggan/tahun dan untuk SAIDI (System Average Interruption Duration Index) adalah : 5,257 jam/pelanggan/tahun.

ANALISIS PENENTUAN SETTING DISTANCE RELAY PENGHANTAR SUTT 150 KV GIS PESANGGARAN – GI PEMECUTAN KELOD Kholid Hidayatullah; Rukmi Sari Hartati; I W Sukerayasa
Jurnal SPEKTRUM Vol 6 No 1 (2019): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The addition of UGC cable (Under Ground Cable) and equipment rating’s change for the reconfiguration from Air Insulated Swichgear into Gas Insulated Switchgear at Pesanggaran substation. Therefore need to reset distance relay settings so that relays can work more selectively and reliably. Using manual and simulation calculations, the results obtained from distance relay reset GIS Pesanggaran - GI Pemecutan Kelod, with impedance value 1 = 2.055 ?, zone 2 = 5.73 ? and zone 3 = 11.01 ? with time delay at zone 1 = 0 seconds, zone 2 = 0.4 seconds and zone 3 = 1.6 seconds. This setting shows that the reload setting value can secure the line from the 3 phase short circuit fault obtained from the simulation results.

ANALISIS PERBANDINGAN UNJUK KERJA WIND TURBINE TSD-500 DAN GH – 0.5K DI PILOT SMART GRID TEKNIK ELEKTRO UNIVERSITAS UDAYANA I. W. Dhanan Arieyasa; Cok. G. Indra Partha; I. W. Sukerayasa
Jurnal SPEKTRUM Vol 7 No 1 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Wind power generation is a power plant that converts kinetic energy into electrical energy by utilizing wind as its energy source. The Smart Grid Pilot Project in Microgrid, Udayana University's Electrical Engineering Study Program has a wind power plant for research. The wind power plants in the Smart Grid Pilot Project in Microgrid Udayana University's Electrical Engineering Study Program totaled 10 turbines with rated power of 500 Watt each, from 10 wind turbines there are 8 wind turbines with TSD-500 models made in Indonesia and 2 wind turbines with GH-0.5K models made in China. The data logger contained in the Pilot Smart Grind in Electrical Engineering, Udayana University, logs 10 wind turbines at a time, so the output power of each wind turbine is unknown. Performance analysis of wind turbine TDS-500 and GH-0.5K using a measuring instrument based on the ATmega 328 microcontroller so that it can find out which wind turbine is larger which results in better power output and performance. The results of this study indicate that the TSD-500 wind turbine performance is better than the GH-0.5K wind turbine.

Rancang Bangun Monitoring Level Muka Air Tanah Di Perkebunan Lahan Gambut Menggunakan SMS Sebagai Pengirim Informasi Data Berbasis Mikrokontroler I Wayan Eka Prastia; I Wayan Arta Wijaya; I Wayan Sukerayasa
Jurnal SPEKTRUM Vol 6 No 1 (2019): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The fires of peatlands on oil palm plantations are very vulnerable to occur in the dry season. Fires will arise due to a decrease in the surface of the water resulting in the top layer of peatland becoming dry. Manually monitoring ground level is very difficult. The solution is to make a remote water level monitoring prototype in order to be able to regulate irrigation on peat land and make the system open and close the irrigation door during the dry season and when the rainy season arrives. The design of groundwater level monitoring uses a program installed on the Arduino Uno microcontroller.Water level data is sent by prototype via GSM SIM 800L network, 8 level conditions that have been determined from a depth of 15 cm multiples of five so on to 55 cm. HC-SR04 Ultrasonic Sensor is a detector for water level. Data can be accessed at any time via SMS by sending "Check" to the prototype. The results of the tests performed indicated that the tool can function in accordance with the design and send information as well as receive monitoring orders.

PEMANFAATAN UDARA BUANG EXHAUST FAN UNTUK PEMBANGKIT LISTRIK TENAGA BAYU DENGAN PENGARUH PENAMBAHAN HONEYCOMB BERBASIS ATMEGA 2560 Yoga Kusuma Wardhana; Cok Gede Indra Partha; I Wayan Sukerayasa
Jurnal SPEKTRUM Vol 8 No 1 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Energy needs are increasing from year to year in line with the increasing population,economic growth, and high energy consumption. More than 86% of the world's energy todaycomes from fossil fuels, while the world's energy demand is increasing. One of theconsiderations for overcoming pollution caused by fossil fuels is to seek alternative energysystems. More than 90% of the energy that affects greenhouse gas emissions is the result ofburning fuels globally. Exhaust Fan is a good system for wind power extraction. This air exhaustsystem is suitable for power plants with wind turbines as a drive where the resulting wind speedis higher and consistent when compared to natural wind, but has turbulent characteristics. Thiswind is not good for the wind turbine. A honeycomb is a tool used to reduce this turbulentcharacteristic. The results obtained by the addition of a hexa type Honeycomb to the exhaustfan with a speed of 6m/s using a savonius type turbine, there was a decrease in turbine speedwhich was previously unstable between 952 to 1007 rpm to 866 rpm and the generator outputpower decreased by 0.3 watts. The addition of Honeycomb makes the turbine rotate speedstable at 866 rpm and the wind flow becomes laminar.

RENCANA PEMASANGAN DISTRIBUTED GENERATION PADA JARINGAN DISTRIBUSI SERTA PENGARUHNYA TERHADAP PROFIL TEGANGAN DAN RUGI-RUGI DAYA A. A. T. B. Artawan; I W. Sukerayasa; W. G. Ariastina
Jurnal SPEKTRUM Vol 7 No 1 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Jatiluwih feeder is a primary 20 kV distribution network with a peak demand of 1.85 MW. The feeder has a radial configuration with a length of 120 kmc. The extended length of the feeder causes a high voltage drop and power loss. One strategy to reduce voltage drop and power loss is by the installation of distributed generation (DG). The energy resource of the DG usually adopts local available renewable energy resources, such as solar power and hydro power. This paper discusses voltage profile and power loss due to the installation of DG on the distribution network. The analysis covered survey of the available renewable energy resources and power flow simulation. Power flow simulation was carried out in two scenarios, before and after the installation of DG. The simulation results showed that during peak daytime load, DG installation is able to reduce maximum voltage drop by 2,08 %, and increases the voltage from 344,4 V to 352,7 V. Besides that, the installation of DG is able to reduce the total power loss by 9,43 % or as much as 530 kW.

STUDI EKONOMIS PENGGUNAAN PLTS ROOFTOP 3 KWP FRAMELESS WITH ON-GRID SYSTEM PADA PELANGGAN R/4400 VA I Komang Widi Astawa; Ida Ayu Dwi Giriantari; I Wayan Sukerayasa
Jurnal SPEKTRUM Vol 8 No 4 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

PLTS is one of the renewable energy technologies sourced from sustainable energy,namely the sun. The potential for solar energy is quite good, making Bali one of the targets forthe energy mix. This research focuses on the production of PV mini-grid energy, savingelectricity costs and finding out whether it is profitable or not to invest in the location, especiallyin one of the SARBAGITA areas located in Perum Nuansa Jimbaran from an economic point ofview. The method used is an economic analysis of investment feasibility, with supportingindicators such as DF, NPV, BCR, DPP, LCC, COE and CRF by considering economic aspects.Yield of this study found that the selling price of PLTS power to PLN was IDR. 1,444.70/kWh,investment cost PLTS is IDR. 61,274,248, it can generate savings of IDR. 5,078,700/year andcumulative income for the 25th year is IDR. 109,341,618. Price sensitivity is very influential onthe cost of PV mini-grid revenue. COE at the energy selling price of IDR 2,888/kWh, can alsoshow the feasibility of the investment so that the investment can be said to be economicallyprofitable.

RANCANG BANGUN SISTEM PEMANEN ENERGI EXHAUST FAN DENGAN DIFFUSER TURBIN ANGIN SUMBU HORIZONTAL Edyama Vasabri Genta Maulana; I Wayan Sukerayasa; Cok Gede Indra Partha
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Utilization of waste energy from exhaust fan air needs to be optimized considering thereis great potential where exhaust fan is widely used in the industrial sector. Exhaust wind fromexhaust fan can be utilized to generate electricity with horizontal wind turbine. Thecharacteristics of exhaust energy from exhaust fan that spreads and has medium to low speed,therefore its requires an optimization to get maximum wind energy from exhaust fan, one ofthem by the addition of a diffuser that can increase the performance of wind turbines byfocusing the wind around the rotor. Designing diffuser conducted using AutoDesk Inventor andsimulation CFD (Computational Fluid Dynamic) with SolidWorks. The results of this studyindicate, horizontal wind turbine with diffuser can increase wind turbine power up to 47.61% andincrease turbine rotational speed (rpm) up to 23.48% compared to wind turbines without adiffuser.

Co-Authors A. A. G. M. Pemayun A. A. T. B. Artawan A. Dharma Agus Satrya Wibawa Allan Ardiansyah Anak Agung Istri Pandawani Bagas Maruli Pangaribuan Bawa Adiputra Bima Aditya Putra C. G. I. Partha, C. G. I. C. G. Indra Partha Chandra Wimartono Manurung Derren, M. Edyama Vasabri Genta Maulana Etis Meilandari Gede Agus Ryzky Martha Gede Endrawadi Gesta Winantara Giusna Dipankara Kusnandar I Dewa Gede Wisnu Agung Bayuna I G.N. Evan Aditya Pramana I G.N.A.B Rama Wahyu Dewangga I Gede Agus Januar Ariawan I Gede Dyana Arjana I K Agus Setiawan I Kadek Adi Darmadi I Kadek Adi Febriana Putra I Komang Widi Astawa I Made Agus Artha Putra I Made Agus Sastradiangga I Made Arya Supartana I Made Gusmara Nusaman I Made Mataram I Made Wahyu Darmahesta I N Satya Kumara I N. Lanus I N. Surata I Nyoman Budiastra I Nyoman Candra Erawan I Nyoman Cita Artawa I Nyoman Gunantara I Nyoman Setiawan I Nyoman Suprapta Winaya I Nyoman Susanta I Nyoman Sutarja I P. A. Edi Pramana I Putu Adi Wirajaya I Putu Andithya Chrisna Budi I Putu Dedi Wiriastika I Putu Juliawan I W. A. Wijaya I Wayan Arta Wijaya I Wayan Eka Prastia I Wayan Rinas I. G. G. B. Prabu Wisesa I. K. A. Wijaya I. K. Wijaya I. W. Dhanan Arieyasa I.A. Dwi Giriantar I.B.G. Manuaba I.G. Surya Subaga I.N. Setiawan I.P. Dika Putra Ariantika I.P.A. Wiranata I.W.A Wijaya Ian Rahmadi Kurniawan IBG Manuaba Ida Ayu Dwi Giriantari Ida Bagus A. Swamardika Ida Bagus Gde Primayatna Indra Baskara Intan Aprilia Medina Jonathan Oliver Ken Julius Mahendra Sihombing Juniastra Gina K. Cakrawenda Yoga Laksana K.Amerta Yasa K.H. Priadi Kadek Agus Nata Riadnyana Kadek Bayu Kusuma Kholid Hidayatullah komang jaryanta aryamantara Kresna Hadi Wijaya Kumara, I. N. S. l Gusti Ngurah Janardana M.K. Huda Made Satria Tresnajaya Margareta Yuniari Mawadah Wr Febriyani Miguel Nazario Muhammad Fauzi N. A. Kartono N.W. Budiantari Nasrul Faisal Neysa Amelia Hutagalung Ngakan Putu Satriya Utama Nyoman Ananda Tri Utami Nyoman S Kumara Pande Ketut Sudiarta R. S. Hartati R.S. Hartati Reki Aji Saputra Richard Antony Suatan Rukmi Sari Hartati Sahabat Nazara Salman Al Farisi Sani Renartha Kusuma Sari, N. P. A. R. Sembiring, Rinawati Setiawan, I N. Setiawan, I. N. Sinaga, P. M. Solly Aryza Surung Rafael Sihaloho Suryo Aji Wicaksono Tjok Gede Indra Partha Virgunia, D. A. W. G. Ariastana Wahyudi Ernest Putra Wayan Agus Adi Widiastra Wayan Gede Ariastina Yoga Kusuma Wardhana Yohanes Made Arie Prawira

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