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Program Studi Teknik Elektro Fakultas Teknik - Universitas Udayana d/a. Kampus Bukit Jimbaran Bali - 80364 Phone/ Fax: +62 361 703315
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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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ANALISA KENAIKAN BEBAN LISTRIK SEKTOR RUMAH TANGGA TERHADAP BEBAN PUNCAK DI KOTA PALANGKA RAYA Septiana, Gebi; Dyana Arjana, I Gede; Arta Wijaya, I Wayan
Jurnal SPEKTRUM Vol 11 No 1 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2024.v11.i01.p25

Abstract

Electricity is an essential need in the life of Palangka Raya City, and it can be utilized across various sectors such as business, social, industrial, governmental, and household. The increase in population growth in Palangka Raya City has led to a rise in the demand for electricity, necessitating its regulation and efficient distribution to customers. Specifically in the electricity sector, particularly in households, the demand tends to fluctuate due to resistive, inductive, and capacitive loads. This study aims to analyze the load factor, which is the ratio of average load to peak load measured over certain periods such as daily, monthly, or yearly. The first step involves data collection in the household sector of Palangka Raya City, including tariff data and monthly consumption data. The second step involves classifying electrical loads followed by an analysis of load factor accumulation. The third step involves summarizing the results of the accumulation data. From the analysis, it is concluded that the highest load factor values are found in the R.1/450 VA category, with an average of 49.30%, and the highest power factor value is 83.16% compared to other load factor categories. However, tariffs for R.3/6,600 VA and above show a gradual decrease in load factor from February to December.
PENGARUH JARAK TURBIN ANGIN SAVONIUS TIPE-U SUMBU VERTIKAL DENGAN SUMBER BUANGAN ANGIN EXHAUST FAN KITCHEN TERHADAP UNJUK KERJA PROTOTIPE PEMBANGKIT LISTRIK TENAGA BAYU Dharma Pawitra, Ida Bagus Gede; Arta Wijaya, I Wayan; Janardana, I Gusti Ngurah
Jurnal SPEKTRUM Vol 10 No 4 (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.i04.p34

Abstract

Energy needs in Indonesia are increasing, especially in the realization of electricity consumption which reached 20.18 TWh in July 2020. Using exhaust wind energy from exhaust fans as an alternative source of wind energy is considered quite effective because the characteristics of the wind produced are stable. The method used in This research is quantitative and the purpose of this research is to get the optimal distance from the vertical axis of the savonius wind turbine to the exhaust fan. Setting the distance of the turbine is done by adjusting the position of the wind turbine to the exhaust fan with 4 test distances, namely 10 cm, 20 cm, 30 cm and 50 cm. The results of this study are a distance of 10 cm with a 40 ohm load, the output power is 1.74 watts with an efficiency of 23%, an 80 ohm load, the output power is 1.4 watts with an efficiency of 18%, a 120 ohm load, the output power is 1.215 watts with an efficiency of 16%. , a 160 ohm load produces 0.91 watts of output power with an efficiency of 12%, a 200 ohm load produces 0.91 watts of output power with an efficiency of 12%. distance of 50 cm 40 ohm load output power generated 0.4 watts with 11% efficiency, 80 ohm load output power generated 0.19 watts with 5% efficiency, 120 ohm load output power generated 0 watts with 0% efficiency, 160 ohm load power the output is 0 watts with 0% efficiency, a 200 ohm load produces 0 watts output power with 0% efficiency, so the optimal distance for placing the turbine is 10 cm.
PERANCANGAN PLTMH UNTUK MENDUKUNG WISATA HIJAU DI BENDUNGAN TAMBLANG, DESA SAWAN, KABUPATEN BULELENG Edy Putra Dewantara, K Fajar; Setiawan, I.N.; Sukerayasa, I W
Jurnal SPEKTRUM Vol 10 No 4 (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.i04.p2

Abstract

The potential of water energy in Bali Province, especially in Tamblang Dam, is very high and can be utilized to provide energy needs in the surrounding area. On the other side, the Buleleng Regency Government took the initiative to develop tourism potential by planning a green tourism-based Tourism Destination Area (DTW), which utilizes renewable energy as a supporting component. One of the renewable energy potentials that can be utilized in Tamblang Dam is Micro Hydro Power Plant (PLTMH), which is designed with a designed flow rate of 2.21 m3/s with a capacity of 1.2 MW. The design of Micro Hydro Power Plant of Tamblang Dam requires an initial investment cost of Rp 2,434,358,091, and based on the results of economic analysis, the design of Micro Hydro Power Plant of Tamblang Dam is classified as feasible for investment, with NPV of Rp 68.6 billion, BCR 40.81, and PP less than 10 years.
SIMULASI DAN ANALISIS DAMPAK PLTS DAN BESS TERHADAP KESTABILAN FREKUENSI SISTEM KELISTRIKAN NUSA PENIDA Harahap, RS; Kumara, INS; Sukerayasa, IW; Giriantari, IAD; Setiawan, IN; Ariastina, WG
Jurnal SPEKTRUM Vol 11 No 2 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The islands of Nusa Penida, Nusa Lembongan, and Nusa Ceningan are some of the famous tourist destinations in Bali. The growth of tourism in the area has increased the demand for electrical energy. PLN is committed to improving infrastructure by building a solar power plant and BESS in Nusa Penida. This research aims to analyze the impact of implementing PLTS and Battery Energy Storage Systems (BESS) on the frequency of the electricity system in Nusa Penida. This research uses a simulation with two scenarios in three different conditions. Scenario 1 is simulated by releasing the Cogindo generating unit from the Nusa Penida electricity system with three conditions, namely an electricity system without PLTS and BESS, an electricity system with PLTS, and an electricity system with PLTS and BESS. Scenario 2 is simulated by removing the Ceningan feeder from the Nusa Penida electricity system with the same three conditions. Simulations were carried out to determine the effect of PLTS and BESS on frequency changes. The simulation results show that frequency changes are still within the limits regulated by the Minister of Energy and Mineral Resources Regulation Number 20 of 2020.
RANCANG BANGUN SISTEM MONITORING TEGANGAN, ARUS, DAN KECEPATAN MOBIL LISTRIK AGNIJAYA WEIMANA Adyana Putra, I Kadek; Satya Kumara, I Nyoman; Raka Agung, I G A Putu
Jurnal SPEKTRUM Vol 10 No 4 (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.i04.p25

Abstract

Electric energy can be utilized as an alternative to replace oil-based fuel. One of the steps to address the energy crisis issue is through the Energy-Efficient Car Competition (KMHE), which emphasizes the energy efficiency of vehicles. The WEIMANA team from Udayana University has participated in the Urban Concept category by designing a vehicle named Agnijaya. Agnijaya is an electric-powered car that uses a Brushless DC (BLDC) electric motor. Currently, the Agnijaya electric car does not have a continuous monitoring system for voltage, current, and speed. The research aims to design a monitoring system for the Agnijaya electric car using an SD card as a data storage medium for voltage, current, and speed data. This system is controlled using an Arduino Mega 2560 Pro Mini microcontroller board as the data processor and an SD card as the data storage medium. The monitoring system for the Agnijaya electric car has been successfully designed, built, and tested for voltage, current, and speed values. Testing was conducted by comparing the measured values of voltage, current, and speed, all of which were stored on the SD card. The results of the analysis indicate that the percentage deviation in battery voltage measurement is 0.85%, the deviation in battery current measurement is 0.23%, and the deviation in speed measurement is 0.32%.
ANALISIS AIR CONDITIONER PADA KOMPLEK PERUMAHAN DI KOTA DENPASAR Bhuana, I.G.A.T.; Kumara, I.N.S.; Giriantari, I.A.D.; Ariastina, W.G.; Setiawan, I.N.; Sukerayasa, I.W.
Jurnal SPEKTRUM Vol 11 No 2 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Green building retrofit is an approach that involves modifying or enhancing existing buildings to achieve higher standards of sustainability and energy efficiency. By conducting an energy audit first, it's possible to identify potential energy savings in the housing, as well as components that need to be upgraded to reach the desired level of sustainability. Retrofit solutions may include the use of implementation of efficient HVAC systems, energy-saving lighting, and better energy management. The aim of this research is to explore the potential improvements that can be applied through Green Building Retrofit with a focus on energy efficiency and sustainability in Jadi Pesona II Barat Housing, comparing the energy consumption conditions of houses before and after the energy audit, as well as calculating the payback period for occupants after the retrofit implementation. After the energy audit and Green Building Retrofit, daily energy usage in homes in Perumahan Jadi Pesona II Barat decreased from 47.45 kWh per day to 36.91 kWh per day. This indicates a reduction of 10.54 kWh per day or approximately 22.22% from the previous conditions, and the payback period analysis results show that almost all air conditioners show values in line with the project investment feasibility parameter, which is below 4.2 years.
ANALISIS KEEKONOMIAN PERANCANGAN PLTS TERAPUNG DAN PLTMH DI BENDUNGAN SIDAN Dwi Gayatri, Ayunda; Dwi Giriantari, I.A.; Jati, I K.
Jurnal SPEKTRUM Vol 11 No 1 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2024.v11.i01.p16

Abstract

The target of using new and renewable energy (EBT) in Indonesia is still to reach the target set at 23% by 2025. The design of Floating PLTS and PLTMH at the Sidan Dam is one thing to maximizing the use of New Renewable Energy, especially in BaIi Province. Therefore, carbon emission analysis and economic analysis on the design of Floating SoIar Energy Power PIant and MycroHydro power plants are carried out. The capacity of the Floating Solar Power Plant utilizes 5% of the dam water level of 1.4 MW and the capacity of the MycroHydro power plants is 0.29 MW. The Floating Solar Power Plant and MycroHydro power plants designed have an investment cost of IDR 22,239,823,399 and IDR 2,739,517,355. Economic analysis of Floating Solar Power Plant is based on NPV of IDR 3,414,844,329, PI of 1.15, and PP of 16.86 years. The economic analysis of MycroHydro power plants is based on NPV of Rp 16,759,312,607, PI of 7.12 and PP of 2.16 years. Reduction in carbon emissions in 25 years for Floating Solar Power Plant amounted to 336,015 tons of CO2e and for MycroHydro Power Plants amounted to 503,548 tons of CO2e.
RANCANG BANGUN SISTEM WEB PADA PROTOTYPE STASIUN PENGISIAN KENDARAAN LISTRIK Agustadewa, Yosia; Rahardjo, Pratolo; Duta Nugraha, I Putu Elba
Jurnal SPEKTRUM Vol 11 No 2 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

In 2023, sales of electric cars in Indonesia experienced a significant increase, reaching 10,327 units when compared to sales in 2021. The existence of electric vehicles requires supporting facilities for the existence of electric vehicles called charging stations. So that users can charge their electric vehicles, a system is needed that can control and monitor the charging of electric vehicles via the web. Web design using Next.js framework on the frontend and Go language on the backend. The web can start charging, stop charging, and display charging data graphs in real time. Web system testing on prototype charging station using BlackBox testing method and obtained eight valid test items.
ANALISIS PENGARUH SUHU PEMANASAN, WAKTU PEMANASAN DAN SUHU PEMBUKAAN TERHADAP CACAT WARPAGE DAN FLASHING PADA MESIN HOT PRESS PLASTIK HDPE Sitanggang, Rafael; Indra Partha, Cokorde Gede; Arta Wijaya, I wayan
Jurnal SPEKTRUM Vol 11 No 1 (2024): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2024.v11.i01.p7

Abstract

The current issue of plastic waste has not yet received appropriate handling, resulting in the inadequate control of plastic waste management practices. Particularly, High Density Polyethylene (HDPE) is still widely encountered. HDPE is a thermoplastic made from petroleum with a melting temperature of 160ºC-240ºC, characterized by being slightly cloudy, transparent, and elastic. This research will conduct testing using a complete randomized design (RAL) factorial analysis with 3 factors to determine the influence of factor A (heating temperature), the influence of factor B (heating time), and the influence of factor C (opening temperature) on flashing defects and warpage defects in HDPE plastic. Based on the testing of flashing defects, the significant influencing factors are factor A (heating temperature), factor B (heating time), factor C (opening temperature), and the interaction of factors AB (heating temperature and heating time). Meanwhile, the significant influencing factors on warpage defects are factor A (heating temperature), factor B (heating time), and the interaction of AB (heating temperature and heating time). Based on this research, the characteristics of HDPE plastic can be determined.
POTENSI PRODUKSI PLTS ATAP GEDUNG RUSUNAWA UNIVERSITAS UDAYANA Partogi Manalu, Eli Musa Reja; Ariastina, Wayan Gede; Dwi Giriantari, Ida Ayu; Setiawan, I Nyoman; Sukerayasa, I Wayan; Satya Kumara, I Nyoman
Jurnal SPEKTRUM Vol 10 No 4 (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.i04.p16

Abstract

The government will continue to increase the use of new and renewable energy as a solution to meet electricity needs, one of which is the use of rooftop solar power plants. In this research, the location that will be planned to install rooftop PV solar system is the Udayana University Rusunawa Building. The produced energy will be able to meet the electrical energy need and as well as supporting the government programs in the utilization of new and renewable energy. The capacity of the rooftop PV solar system to be installed is determined based on the load profile of the Udayana University Rusunawa Building. Three different scenarios namely 20 kW, 15 kW and 10 kW PV solar systems have been simulated using a PV solar simulator. Results of the simulation scenarios then are compared to look at the differences among the produced energy.

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