Jurnal SPEKTRUM
Jurnal SPEKTRUM is peer review journal, published four times a year by the Department of Electrical Engineering, Faculty of Engineering, Universitas Udayana. This journal discusses the scientific works containing results of research in the field of electrical, include: power systems, telecommunications, computers, informatics, controls, and electronics. Authors are expected to include original scientific papers in accordance with the scope of the discussion of this journal including all aspects of the theory and practice are used.
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<![CDATA[PERANCANGAN PLTS UNTUK PERAHU NELAYAN TRADISIONAL SEBAGAI PENGGANTI GENSET ]]>
<![CDATA[I Putu Indra Saputra]]>;
<![CDATA[I Nyoman Satya Kumara]]>;
<![CDATA[Cok Gede Indra Partha]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p15
<![CDATA[Nelayan tradisional adalah nelayan yang menangkap ikan pada malam hari, menggunakan perahu kecil. Nelayan menggunakan lampu sorot halogen yang dicatu dengan genset kecil, untuk menarik perhatian ikan. Kendala yang dihadapi nelayan yaitu harga minyak yang semakin mahal, kelangkaan minyak, getaran dan suara berisik dari genset yang membuat ikan takut mendekat, konsumsi energi yang tinggi dari lampu sorot halogen, serta polusi udara dan emisi karbondioksida dari penggunaan genset. Solusi yang ditawarkan yaitu mengganti genset dengan PLTS. PLTS yang dirancang yaitu, 2×80 ???????? modul surya dirangkai seri, 10 ???? charger controller dan 2×70 ????? baterai dirangkai seri untuk menyuplai 4×30 ???? lampu sorot LED. PLTS ini mampu memenuhi kebutuhan energi sebesar 174,52 kWh/tahun, dari 175,2 kWh/tahun, jadi sebanyak 99,6 % kebutuhan energi telah mampu disuplai. Investasi awal sistem PLTS ini yaitu 10.639.500 rupiah, dengan pengurangan emisi karbondioksida sebesar 63.291.569 ????????/?????????????????.]]>
<![CDATA[ANALISIS RESETTING PROTEKSI OVER CURRENT RELAY, GROUND FAULT RELAY DAN RECLOSER PADA PENYULANG ABANG DAN FEEDER AMED SETELAH REKONFIGURASI ]]>
<![CDATA[A. A. Gde Agung Semarabawa]]>;
<![CDATA[Tjok. Gede Indra Partha]]>;
<![CDATA[I Gede Dyana Arjana]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p6
<![CDATA[Abang feeder receives electricity supply from transformer II 30 MVA GI Amlapura with a line length of 23 kms and has 67 distribution substations with data losses of 0,574 MW. Reducing losses, increasing reliability and continuity, one way to do this is to reconfigure feeders. The feeder reconfiguration will affect the value of the feeder impedance, so the resetting of the Over Current Relay, Ground Fault Relay and Recloser protection systems is needed. Resetting the protection of Amed OCR feeder obtained t value = 0.1 seconds, OCR recloser Tirtagangga obtained t value = 0.2 seconds, and Oang feeder Abang obtained t value = 0.3 seconds. Resetting the protection of the Amed GFR feeder obtained a value of 0.1 seconds, GFR recloser Tirtagangga 0.2 seconds, and GFR feeder Abang 0.3 seconds. The simulation results using the ETAP program are known to coordinate OCR, GFR and recloser already working well with grading time values ? 0.3 second, so it will not cause overlap or trip simultaneously.]]>
<![CDATA[DESAIN JARINGAN HOTSPOT FAKULTAS TEKNIK UNIVERSITAS UDAYANA BUKIT JIMBARAN MENGGUNAKAN STANDARD IEEE 802.11N OUTDOOR DENGAN KUALITAS VOIP ]]>
<![CDATA[Komang Diyana Putra]]>;
<![CDATA[Pande Ketut Sudiarta]]>;
<![CDATA[Nyoman Pramaita]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p11
<![CDATA[Fakultas Teknik Universitas Udayana memiliki area outdoor yang cukup luas, maka dari pada itu dibutuhkan penelitian dalam melakukan desain jaringan untuk area outdoor pada kawasan Fakultas Teknik Universitas Udayana Bukit Jimbaran. Pada paper ini menganalisis jangkauan WLAN kondisi outdoor dengan kualitas VoIP. Aplikasi yang digunakan adalah G-NET Wi-fi, Terminal Emulator dan menggunakan software Atoll. Dalam melakukan penelitian, diawali dengan melakukan pengukuran level sinyal dari AP dengan rentang jarak 3 meter dari AP dilanjutkan ke jarak 6 meter dan seterusnya sampai titik dimana tidak dapat melakukan komunikasi antara AP dengan Reciever. Berdasarkan hasil analisis kondisi jangkauan area Voip yang dilakukan di wilayah Fakultas Teknik Univrsitas Udayana, mendapatkan kondisi dimana level sinyal pada masing- masing jarak mendapatkan hasil yang berbeda dengan hasil ukur. Dengan mengacu pada penelitian yang telah dilakukan, diperlukan penambahan AP di kawasan Fakultas Teknik Universitas Udayana Bukit Jimbaran, diperlukan 34 AP pada kawasan Fakultas Teknik Utama dan 13 AP untuk kawasan fakultas teknik sipil.]]>
<![CDATA[SIMULASI UNJUK KERJA PLTS 1 MW KAYUBIHI JIKA MENGGUNAKAN SUN TRACKING SYSTEM ]]>
<![CDATA[I.P.A. Wiranata]]>;
<![CDATA[I.N.S. Kumara]]>;
<![CDATA[I.W. Sukerayasa]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p2
<![CDATA[The Kayubihi PLTS is a PLTS with a capacity of 1 MWp. The Kayubihi PLTS solar module is installed in a fixed configuration, installed facing north with a tilt angle from the ground surface of 15 °. In a condition without a tracker, the Kayubihi PLTS generates an annual energy of 1656.2 MWh. In this paper a simulation will be carried out to find out how much energy the PLTS Kayubihi has when it has a sun tracker system installed. This tracker system simulation will be made in 2 scenarios. Scenario 1 uses a single axis tracker system where the solar module will move to follow the sun from east to west. Scenario 2 Kayubihi PLTS is equipped with a multi axis tracker system that moves in the direction of the sun from east to west and north to south. Simulations using a single axis tracker system produce annual energy of 2096.1 MWh. While simulations using the multi axis tracker system produce an annual energy of 2159.8 MWh. When compared with existing conditions, the use of a single axis tracker system gets an increase in energy of 439.9 MWh and if using a multi axis tracker system an energy increase of 503.6 MWh is obtained. The annual energy difference in the single axis tracker system with the multi axis tracker system is 63.7 MWh. The total cost of installing a single axis tracker system is Rp. 560,000,000 with 70 units of tracker and installing a multi axis tracker system amounting to Rp. 700,000,000. A total of 70 units of tracker. Keywords: Kayubihi PLTS, Single Axis Tracker System, Multi Axis Tracker System. At the results of the simulation of electricity sales, the tracker system is more profitable than the system without a tracker.]]>
<![CDATA[STUDI PROTEKSI DOUBLE BUSBAR AKIBAT PENAMBAHAN TRANSFORMATOR DI GARDU INDUK PEMECUTAN KELOD ]]>
<![CDATA[I Kadek Rogan Bayu Candra Dwipa]]>;
<![CDATA[I Gede Dyana Arjana]]>;
<![CDATA[Cok Gede Indra Partha]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p16
<![CDATA[Pemecutan Kelod Substation operated with four conductors, three transformers, one capacitor and one coupling with double busbar configuration, side by side with the Kapal and Pesanggaran substation to maintain electricity supply in Kuta, Legian, Seminyak, Denpasar City and surrounding areas. Due to increase in load in Denpasar area, PT PLN (Persero) Trans-JBJT added one transformer to improve the reliability of electricity in this substation, so Pemecutan Kelod substation operated with four transformers. To optimize the continuity of the power flow, it is necessary to analyse the relay settings on the busbar current and the appropriate protection settings as a protection system reference. In this study, the calculation of resistor stability (Rstab) of input current and output current after and before the addition of the transformer is carried out. The results of the calculation of resistor stability (Rstab) before the addition of the transformer is obtained with a total of 5.12 ?, the input current is 1030 A and the output current is 1010 A with losses of 1.9%. While the results of the calculation of resistor stability (Rstab) after the addition of the transformer is obtained with a total of 5.64 ?, the input current is 1070 A and the output current is 1060 A with losses of 0.9%. Those losses values complied with the SPLN No.1: 1987 standard for the 150 kV system.]]>
<![CDATA[REKONFIGURASI JARINGAN DISTRIBUSI PADA PENYULANG RUMAH SAKIT BALI MED (RSBM) ]]>
<![CDATA[I Gede Nadi Arta]]>;
<![CDATA[I Nyoman Setiawan]]>;
<![CDATA[I Wayan Arta Wijaya]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p7
<![CDATA[RSBM feeder is one of the feeders sourced from transformer 2 of the Amlapura Substation. This feeder is a radial type 20 kV distribution network configuration with 133 distribution transformers with a total power of 5.428 kVA and a load of 144 amperes. The lowest voltage condition in RSBM feeders has reached 18,608 kV or a voltage drop of 6.96%. To overcome the voltage drop and power loss in RSBM feeders, it is necessary to reconfigure the network. Network reconfiguration is done by planning a new feeder (Rendang feeder). Analysis of power loss and voltage drop using the help of ETAP software. Based on studies that have been done, before the network reconfiguration is obtained the percentage of voltage drop is 6,98% and the power loss is 5,68%. After being reconfigured with a new feeder plan (Rendang feeder), it showed good results, ie the percentage of voltage drop dropped to 2.09% and the power loss dropped to 3.20%. Whereas the Rendang feeder showed good results with the percentage of voltage drop of 2.78% and the power loss of 3.47%. Based on load forecasting for the next 5 years on RSBM feeders the voltage drop and power loss are still according to the standard. Whereas the Rendang feeder occurs a voltage drop and a power loss that is not up to standard in 2023, namely a voltage drop of 5.20% and a power loss of 5.07%. So that for the Rendang feeder in 2023 it is necessary to break the load or reconfigure the feeder again.]]>
<![CDATA[Analisis Prediktif Pemeliharaan Minyak Transformator Menggunakan Metode Markov ]]>
<![CDATA[I.G. Surya Subaga]]>;
<![CDATA[I.B.G. Manuaba]]>;
<![CDATA[I.W. Sukerayasa]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p14
<![CDATA[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.]]>
<![CDATA[PENGARUH POTENSIAL HIDROGEN (pH) TANAH TERHADAP TAHANAN JENIS TANAH UNTUK MENDAPATKAN BENTUK SISTEM PEMBUMIAN ]]>
<![CDATA[INA Seputra]]>;
<![CDATA[IWA Wijaya]]>;
<![CDATA[IGN Janardana]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p5
<![CDATA[Grounding is a basic measure to guarantee the security, reliability of the operation of the system and ensure the safety of humans and living things when there is a ground disturbance in the electric power system. In research on the earthing system, what must be considered is the nature of the soil as the place where the grounding system will be installed. The difference in soil type and acidity will affect the safety quality of the grounding system. This study discusses the acidity of the soil to get an appropriate earthing system on different soil textures. The research method used is direct measurement of acidity and resistivity of different soil textures. As well as analyzing by calculating the optimization of 4 types of earthing system namely Rod, Multiple Rod, Plate, Mesh and Grid-Rod technically. The results of the analysis found that each soil has a different level of acidity. The stronger the soil acidity, the smaller the type of resistance produced. A good acidity level is used for the grounding system (pH <7). Unequal acidity causes different types of soil resistivity, so the shape of the grounding system will vary according to the texture and type of soil.]]>
<![CDATA[Potensi Pembangkit Listrik Tenaga Surya Atap Gedung Sekolah di Kota Denpasar ]]>
<![CDATA[H. Kristiawan]]>;
<![CDATA[I.N.S. Kumara]]>;
<![CDATA[I.A.D. Giriantari]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p10
<![CDATA[Solar Power Generation System (PLTS) is a power generation system that utilizes sunlight as a renewable energy source and a rooftop as a place for solar panels. This paper presents the results of a study of the potential of a rooftop-based solar power plant in the city of Denpasar by taking a location on the roof of the SD Negeri 5 Pedungan Diponegoro No. 60 Denpasar road using PLTS objects that have been installed. The study was carried out with the help of Heliospoce software. Based on the study, information was obtained that the potential of solar energy was 1912.8 kWh / m2 / year or an average of 5.2 kWh / m2 / day in the city of Denpasar. Sunlight that can produce electricity starts at 07.00 -18.30 WITA. The installed energy potential of PLTS is 3214.6 kWh with an angle corresponding to the roof angle of 30.96o. The result of the potential energy produced will be greater if the installation of PV uses the optimal angle (15o) that is equal to 3407kWh.]]>
<![CDATA[OPTIMASI PENEMPATAN DAN KAPASITAS KAPASITOR UNTUK MEMINIMALKAN SUSUT DAYA PADA PENYULANG TABANAN DENGAN MENGGUNAKAN METODE ANT COLONY OPTIMIZATION (ACO) ]]>
<![CDATA[Fadil Arialdi]]>;
<![CDATA[Rukmi Sari Hartati]]>;
<![CDATA[I Made Mataram]]>
<![CDATA[ Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2019.v06.i04.p1
<![CDATA[Electricity is one of the needs of society that must be met, because electricity is very instrumental in helping everyday life, such as lighting, and for the electronic needs. In distributing power to consumers there is a power loss in the distribution system channel. To reduce power loss, it is necessary to install capacitors. This study aims to reduce power losses in Tabanan feeders using the Ant Colony Optimization (ACO) method with 10 attempts using MATLAB. The total power loss before the capacitor is installed is 0.421 MW (6,4%), after the analysis is obtained the placement of the capacitor located on bus 10 with a capacity of 1000 KVAR, can reduce the power loss to 0.145 MW (2,2%)]]>
