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Jurnal SPEKTRUM
Published by Universitas Udayana
ISSN : 23023163     EISSN : 26849186     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering
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.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 677 Documents
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PENGARUH PERUBAHAN JUMLAH SUDU TURBIN TURGO TERHADAP DAYA OUTPUT PADA PROTOTYPE PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) Ida Bagus Made Pandwa Putra; I Wayan Arta Wijaya; I Gusti Ngurah Janardana
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (630.294 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i03.p1

Abstract

The increase in demand for electrical energy in Indonesia causes a reduction in conventional fuel reserves. This situation forces people to look for alternative energy sources or commonly callednew and renewable energy (RE). Seeing the geographical condition of the environment in Indonesiawhich has the potential for the development of electrical energy by utilizing the flow of water, it iscalled a Micro Hydro Power Plant (PLTMH). In implementing MHP, one type of impulse turbine canbe used, namely the Turgo turbine. This study focused on knowing the effect of variations in thenumber of blades on a turgo turbine on rotational speed, torque, voltage, current and power producedby PLTMH using a Turgo turbine, with variations in the number of blades used, namely 18,16,14,9,8,and 7 blades. The method used in this research is quantitative experimental, all combinations ofparameters tested get the result that the highest output characteristic value occurs using a runnerwith a number of 18 blades, where the voltage, current, and output power are 8.30 Volts, 0, 88Ampere, and 7.27 Watt. The fastest turbine rotation results are 782.8 rpm before being connected toa generator and 565.4 rpm after being connected to a generator, while the generator rotation resultsare 1062.4 rpm. The highest torque produced is 0.1Nm, the maximum efficiency obtained at therunner blade variation is 18 blades, which is 1.1%.
DESAIN SIMULASI PERFORMANSI KODE ORTHOGONAL GOLD PADA KANAL MULTIPATH FADING Arzalia Khairunnisa Yasmine; Nyoman Pramaita; N.M.A.E.D Wirastuti
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.614 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i04.p2

Abstract

Improved wireless communication system generate the various advanced technologies, one of which is spread spectrum technique. This technique working by multiplying dots bits information which have a large period with spreading code that have a smaller periode, which makes bit periode will follow the code periode. In order to maximize performance of this technique, an efficient code is required to reduce the occurrence of interference. The purpose of this study was to see how the variation of multipath components affected the work of the orthogonal gold code. This study compares BER vs. Eb/No for multipath components 10, 15, and 20 using code length 32, 8 users, and BPSK modulation. The multipath component 10 exhibits the best BER value, which is impacted by the degree of interference indicated by the size of the ACF value. and CCF on a non-zero shift.
RANCANG BANGUN PROTOTYPE TURBIN VORTEX UNTUK PEMBANGKIT LISTRIK TENAGA MIKROHIDRO (PLTMH) Gede Pudja Dianda Mayapada; Lie Jasa; I Made Suartika
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (493.028 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i03.p6

Abstract

MHPP is a run of river hydroelectric power plant type, that does not require a large dam or water discharge, but rather diverts the flow rate of water into a channel. Vortex turbine utilizes whirlpool of water obtained from the spiral basin shape to push the turbine to rotate. The reason of this research was to decide the design of the MHPP prototype using a vortex turbine. This prototype is a miniature or laboratory scale. This research is designed to model the MHPP prototype using a Vortex turbine which is helpful for learning before it is implemented directly to the river. In this study, the prototype MHPP with vortex turbine was designed with a 0.3 m head, 1.5 dim input pipe, 4.5 L/s water flow, basin with an upper diameter of 40 cm, 40 cm height and 12 cm outlet and 41° cone angle. The runner blade design has 9 blades with a runner outer diameter of 15 cm, 5 cm neck diameter, and 5 cm runner width. This prototype is able to generate power of 0.387 Watt and has an efficiency of 2.93%.
SURVEI BIAYA INVESTASI AWAL PLTS ATAP DI INDONESIA TAHUN 2022 I Putu Yudi Pramayasa; I Nyoman Satya Kumara; I Nyoman Setiawan
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (403.392 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i03.p11

Abstract

The slow development of New and Renewable Energy such as solar energy in Indonesia are influenced by land acquisition and the high initial investment costs, but lately the cost of solar power plant development prices has been decreasing globally year by year. This research will review the development of PV mini-grid investment costs in Indonesia and this information can be used as a source of information for stakeholders to understand the development of PV mini-grid prices in 2022. The price of the solar power plant construction was obtained through a survey from the e-commerce website. From the survey, 55 data has been obtained related to the price of solar power plant rooftop construction in Indonesia with a capacity scale of 1 KWp to 10 KWp with price range from Rp. 14,000,000 to Rp. 207,000,000. The average initial investment cost for the construction of a PLTS Roof in Indonesia with a capacity of <2 KWp is Rp. 22,954,000, <3 KWp is Rp. 42.838.000, <4 KWp is Rp. 60,716,000, <5 KWp is Rp. 64,473,000, <6 KWp is Rp. 82,986,000, 6 KWp is Rp. 102,380,000, 7 KWp is Rp. 117,580,000, 8 KWp is Rp. 140,980,000, 9 KWp is Rp. 156.580.000, and 10 KWp is Rp. 151,820,000.
DESAIN SIMULASI UNJUK KERJA BARKER CODE PADA KANAL FREQUENCY SELECTIVE FADING I Putu Dio Gangga Saskara; Nyoman Pramaita; I Gusti Agung Komang Diafari Djuni H
Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.926 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i03.p2

Abstract

The signal that arrives at the receiving end is the sum of the various transmissions passed by the signal (multipath) which is influenced by the channel so that there is signal interference. Many innovations have been made so that the received signal can have high security, one of which is spread spectrum with a dual access scheme to increase the ability of many spectrum users in a limited number without disturbing one another. This simulation was tested with the aim of spreading the spectrum with different code lengths for the same bit length of information, and observed from the change in the BER value obtained from the MATLAB 2018a simulation results to find out how the barker code performance on the frequency selective fading channel on a single user. The analysis of this research is obtained from the simulation results in the form of a graph that shows the BER value compared to Eb/No. The BER value shown by the barker code performance on the flat fading channel, which is compared based on the existing flat theory, shows the graph trend and the BER value generated from the simulation is close to the theoretical flat BER value. The performance of the barker code on the frequency selective fading channel is carried out by varying the number of multipath components 7, 5, and 3. The simulation results show that multipath 3 is the best with the smallest bit error value compared to multipath 7 and 5. Barker code performance is strongly influenced by the number of multipath components, the more the number of multipath components, the more performance of the barker code bit error, and vice versa.
ANALISIS SISTEM PENGAMAN UTAMA UNTUK MENGAMANKAN BUSBAR 150 kV TERHADAP GANGGUAN DI GIS PECATU Made Niken Ayu Larasati Danianto; I Gede Dyana Arjana; Cok. Gede Indra Partha
Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (779.579 KB) | DOI: 10.24843/SPEKTRUM.2022.v09.i04.p6

Abstract

GIS (Gas Insulated Switchgear) is a system of connecting and disconnecting the power grid which is packaged in a non-ferrous tube, using gaseous sulfur hexaflouride (SF6) as the insulation medium. The 150 kV of GIS Pecatu is located in Pecatu Village, South Kuta, Badung Regency, Bali Province. This GIS was built to help supply 120 MW of energy because of the load in Badung area, especially Pecatu and Nusa Dua, is increasing. So, it is necessary to know the differential relay current settings when there is a fault of short circuit in GIS Pecatu to produce an effective, selective and reliable safety system. When there is a fault of 11.58 kA the relay will work immediately within 0 SI, this proves that the differential relay with Instantaneous characteristics will immediately command a trip when the fault current has surpass the set value. From the calculation results, the setting of the main safety relay has worked in appropriate with the SPLN standard No. 52-1 1984 for the 150 kV system.
STUDI PERENCANAAN PEMBANGKIT LISTRIK TENAGA MIKROHIDRO PADA SALURAN IRIGASI DESA ANGANTAKA ABIANSEMAL BADUNG I Komang Ogik Parmana Putra; Ida Ayu Dwi Giriantari; I Nyoman Setiawan
Jurnal SPEKTRUM Vol 10 No 1 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i01.p1

Abstract

The utilization of renewable energy can be a solution to meet the current increasing demand for electrical energy in rural areas, one of which is the use of water energy with the development of PLTMH. In this study, the planning of a microhydro power plant was carried out in the irrigation canal of Angantaka Abiansemal Badung Village as a source of electrical energy to meet the needs of electrical energy. The Angantaka Village irrigation channel has a head 2,1 meters, a width of 1,95 meters, an average depth of 0,88 meters and a water discharge of 0,3045 m3/s. The PLTMH planning system uses a breastshot wheel type water wheel with an efficiency of 75% and TEK STC-5 kW 3 phase AC synchronous generator and a 6 kW ELC control panel. Planning for PLTMH on the irrigation canal of Angantaka Abiansemal Badung Village with a capacity of 3,76 kW / 4,70 kVA. The initial investment cost required is IDR. 72.055.375 with operational and maintenance cost of IDR. 720.553 in one year.
PENANGGANAN GANGGUAN FREKUENSI RADIO RADAR CUACA BMKG WILAYAH III DENPASAR PADA PITA FREKUENSI 5 GHz Ketut Bagus Bayu Sanjaya; I Made Oka Widyantara; I G A Komang Djuni Hartawan
Jurnal SPEKTRUM Vol 10 No 1 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i01.p2

Abstract

The existence of a radio frequency spectrum is regulated by the state as stated in Government Regulation number 53 of 2000, which is a limited natural resource that has strategic value in the operation of telecommunications. And the utilization of the radio frequency spectrum as a natural resource needs to be carried out in an orderly, efficient and appropriate manner so as not to cause harmful interference. Denpasar Class I Radio Frequency Spectrum Monitoring Center (Balmon Denpasar) as one of the UPT (Technical Service Units) of the Directorate General of SDDPI has the task of carrying out supervision and control in the field of radio frequency spectrum use in the Bali region. This study aims to be able to carry out supervision and observation of the radio frequency spectrum through observation (Ocupansy). Seeing the scope of the existing problems, this practical work report will provide the following problem boundaries: Observation of the occupation of the radio frequency spectrum through observation, measurement of technical parameters and law enforcement. There are complaints of disturbances on the radio frequency 5625 MHz for weather radar by the Meteorology, Climatology and Geophysics Agency (BMKG) Region III Denpasar caused by the use of the 5 GHz band frequency by ISPs using wireless LAN.
PENGEMBANGAN JARINGAN TRANSMISI 150 KV BALI BERDASARKAN RENCANA UMUM KETENAGALISTRIKAN DAERAH (RUKD) PROVINSI BALI TAHUN 2022 – 2030 I G.N. Evan Aditya Pramana; W.G. Ariastina; I.W. Sukerayasa
Jurnal SPEKTRUM Vol 10 No 1 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i01.p3

Abstract

The need for electrical energy increases every year. That is linear with the economic growth that happens in the area. Bali is an area where the demand for electrical energy has increased significantly throughout the year. The increase in electrical energy demands will cause the power peak load to increase as well. It's necessary to develop a 150 kV transmission system to anticipate peak load from reaching the breakdown point of the transmission system. Based on this study, the transmission line from Kapal Substation to Pemecutan Klod Substation experienced 80.1% of the maximum load capacity of the line in 2029. It means that the load flow has exceeded the ideal loading of the transmission line, which is 80% of its maximum capacity. Uprating the conductor from TACSR 240 mm2 to ACCC Lisbon 310 mm2 and adding a new circuit line, will help the transmission line sustainable until 2046 before reaching 100% of its maximum capacity.
ANALISIS UNJUK KERJA PLTS CARPORT 37,8 KWP DI AREA PERKANTORAN KEMENTERIAN ESDM REPUBLIK INDONESIA JAKARTA PUSAT Kavlin Rafhel Panjaitan; Ida Ayu Dwi Giriantari; I Nyoman Setiawan
Jurnal SPEKTRUM Vol 10 No 1 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i01.p4

Abstract

The utilization of PV in Indonesia increased significantly. Based on data submitted by the Director General of EBTKE, the PV capacity value until first semester of 2021 is 217 MW. New challenge has emerged, namely maintaining performance of the PV system in good condition. Performance of the PV Carport system is analyzed by simulating PV using PVSyst software to see the potential value of electricity production, then calculating the performance parameters of the PV system such as Yield Factor (Yf), Yield Reference (Yr), Performance Ratio (PR) and Capacity Factor (CUF). Then compared with the results of electricity production and performance parameters of the PV system during operation for one year. The object of research on performance of the 37.8 kWp Carport PV system belonging to Ministry of Energy and Mineral Resources. Based on the PVSyst simulation results, the potential annual electrical energy from the Carport PV system is 53,910 kWh with performance parameters (Yf, Yr, PR, and CUF) respectively 1,426.19 kWh/kWp, 1,751.9 kWh/kW, 81.4% and 16%. The production value of the Carport PV system for a year in 2021 is 21,694.67 kWh with performance parameters (Yf, Yr, PR, and CUF) respectively of 573 kWh /kWp, 1,679.9 kWh/kW, 34% and 6.6%.

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