cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Nyoman Gunantara
Contact Email
gunantara@unud.ac.id
Phone
+6281558140279
Journal Mail Official
gunantara@unud.ac.id
Editorial Address
Program Studi Teknik Elektro Fakultas Teknik - Universitas Udayana d/a. Kampus Bukit Jimbaran Bali - 80364 Phone/ Fax: +62 361 703315
Location
Kota denpasar,
Bali
INDONESIA
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
 62   63   64   65   66 
PENGARUH VARIASI DIAMETER UJUNG NOZZLE TERHADAP LAJU UAP UNTUK MENGGERAKAN TURBIN PLTSa Daton Trisnadana, I Nyoman; Indra Partha, Cok. Gede; 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.p5

Abstract

Garbage is a very serious problem in the coastal areas of the beaches in Bali because the management of postal waste from the sea is not optimal. One way of processing waste is using a waste power plant (PLTSa) that can generate electricity. This study aims to find out how the effect of variations in the diameter of the nozzle on the rate of steam generated to drive the PLTSa turbine, with this research method using descriptive quantitative. Tests on the PLTSa prototype used a single-stage impulse turbine using a runner diameter of 44cm and a total of 75 turbine blades. This prototype uses 3 nozzle diameter variations, namely 3mm, 6mm and 9mm with a boiler output steam of 3 bar so that the highest average steam rate occurs at a nozzle diameter of 6mm to get a result of 1470 rpm before connecting the generator and 2460 rpm after connecting the generator.
ANALISIS RE-SETTING DISTANCE RELAY MENGGUNAKAN METODE ARTIFICIAL NEURAL NETWORK PADA SALURAN TRANSMISI SISTEM 150 KV GARDU INDUK BANGIL – GARDU INDUK PIER Adi Prasetyo, Wibisono; Karim Mewal, Karel A; Sianturi, Roni; Mataram, I Made; Indra Partha, Cok. Gede
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.p28

Abstract

The results of conducting impedance measurements at the Bangil - PIER Substation using the Omicron CPC100 tool show the difference in the results with the factory specification impedance value which exceeds the tolerance limit of 5% of the test results. Re-setting the distance relay is needed so that the relay is able to properly secure the transmission line. In this study, the Artificial Neural Network model was used to re-setting the distance relay. Re-setting was carried out using Analysis Software Based on Modeling and Visualization showed that the relay worked very well in responding to disturbances without overlapping it ranges. The results of calculation using ANN showing a very high level of accuracy of 99.88% and an error rate of 0.00113. Other data analysis indicators used produce the following values: MSE = 0,00002, RMSE = 0,0047 , MAD = 0,00361 , and MAPE = 0,163% which indicates that the Neural Network model that has been made is feasible to use.
PERENCANAAN PEMBANGKIT LISTRIK TENAGA SURYA SEBAGAI CATU DAYA PADA SISTEM POMPA AIR DI SUMUR BOR ABIANSEKA II Ananta Mahanata, I Gusti Putu; Dwi Giriantari, Ida Ayu; Setiawan, I Nyoman
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

To accelerate the increase in the use of New Renewable Energy (EBT) in Bali Province in accordance with the General Regional Energy Plan (RUED), the Bali Provincial Government issued Bali Governor Circular Letter (SE) Number 5 of 2022. One of the applications of this letter is investment planning and analysis installation of a Solar Power Plant (PLTS) at the Abianseka II drilled well in Batuan Kaler Village, Gianyar. The Abianseka II drilled well is equipped with 4 pumps which on average consume 25,093.33 kWh of electricity per month. Based on the survey, the land available at the Abianseka II drilled well is sufficient for the installation of Ground Mounted PLTS covering an area of 478.5 m2. Therefore, it was decided to use 83 Jinko Solar JKM610N-78HL4-V 610 Wp modules with a total capacity of 50.6 kWp, as well as 1 LivoLtek 60 kW inverter and PLTS are capable of producing annual energy of 82,783 MWh, and have a performance ratio of 82.3%.
RANCANG BANGUN PROTOTIPE SISTEM ATS-AMF BERBASIS MIKROKONTROLER DI PERUMDA AIR MINUM TIRTA SANJIWANI UNIT PRODUKSI BLANGSINGA Eka Pratama, I Gusti Putu; 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.p19

Abstract

The continuity of electricity supply from generators to consumers cannot always be guaranteed due to various factors such as planned outages, distribution failures, and the impacts of natural disasters. The Regional Public Water Company (Perumda) Tirta Sanjiwani has adopted generators as Backup Power Sources to ensure the availability of water supply to consumers. However, the Blangsinga Production Unit of Perumda Tirta Sanjiwani faces challenges in switching electricity supply between PLN and the generator set (genset), especially in operations requiring uninterrupted continuity. To overcome the instability of the electricity supply from PLN, the use of automatic systems such as ATS (Automatic Transfer Switch) and AMF (Automatic Main Failure) is necessary. The function of ATS is to switch from PLN to the backup power source (genset) when there is a disturbance or outage in PLN. AMF is responsible for detecting failures in PLN and initiating the genset as well as transferring the load to the backup power source when there is a failure in the main power supply. The ATS-AMF system prototype is designed using voltage sensors, frequency sensors, current sensors, and relays to ensure optimal performance and responsiveness to environmental conditions and power supply conditions.
VISUALISASI DATA PENGELOMPOKKAN KELULUSAN MAHASISWA DENGAN ALGORITMA CLUSTERING K-MEANS Adinda Hermawan, Salsabila; Sari Dewi Hartanto, Dessy Ratna; Wiharta, Dewa Made; Arsa Suyadnya, I Made
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.p10

Abstract

The implementation of technology in universities is rapidly increasing, Either of them are creating various groupings such as financial, library, and academic data. This research implemented the graduation data Udayana University Faculty of Engineering students by applying the data mining method, specifically the K-Means Clustering algorithm. The study aimed to assist Udayana University Faculty of Engineering in comprehending detailed graduation patterns by categorizing the data based on variables including students' origin (district or city) and the study programs in engineering faculty. This research also focused on the visualization design of clustered data in the form of charts and graphs. This data visualization dashboard was created using Google Looker Studio, which the clustered student graduation data is visualized in the form of charts and clustering graphs, which can make it easier for Udayana University Faculty of Engineering to achieve new information and useful insights to improve the academic performance of Udayana University Faculty of Engineering itself.
PERANCANGAN PLTS ON GRID SEBAGAI SISTEM CATU DAYA KAWASAN JATILUWIH Dimas, Dimas; I Nyoman Satya Kumara, I Nyoman Satya Kumara; Sukerayasa, I Wayan
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.p19

Abstract

Jatiluwih is a tourist village that was declared by UNESCO as one of the locations of world cultural heritage in 2012. Being recognized as a World Heritage Site, the Jatiluwih Area is not allowed to undergo any development that could damage the area's image. To support Jatiluwih as a green and sustainable area, this study proposes the installation of Grid-Connected Solar Photovoltaic Systems (PLTS) on rooftops to serve as the power supply system for the area. The objective of this study is to assess the rooftop solar power plant's capability and its energy production to meet the energy needs in the Jatiluwih WBD Area.Based on the survey, there are 45 buildings to support tourism activities in the Jatiluwih WBD Area, with a total daily energy requirement of 225.37 kWh. According to the established criteria, five buildings meet the requirements for installing rooftop PLTS. In the design of the rooftop PLTS, two scenarios are used: the load requirement scenario and the roof area scenario. The research results indicate that the installed rooftop PLTS capacity based on the load requirement for the Dukuh Baturan Villa, Warung Dhea, and Bhuana Agung Restaurant buildings is 2.05 kWp, for the Restoran Iga Lawar building is 2.46 kWp, and for the Teras Subak Homestay building is 1.2 kWp. Based on the roof area, the Dukuh Baturan Villa building has a capacity of 9.8 kWp, Teras Subak Homestay has 23.4 kWp, Warung Dhea has 10.6 kWp, Restoran Iga Lawar has 16 kWp, and Bhuana Agung Restaurant has 6.5 kWp.The rooftop PLTS system on these five buildings in Jatiluwih, using the roof area scenario, can generate an energy output of 270.35 kWh/day, thereby fulfilling the energy requirements of the 45 buildings.
EVALUASI TATA KELOLA TEKNOLOGI INFORMASI MENGGUNAKAN FRAMEWORK COBIT 5 DAN ITIL V3 2011 PADA PT. BALI UNGGUL SEJAHTERA Maulana Hendarwan, Iqbal; Jayantara Adiputra, A A Bagus; Endika Ginting, Alloy; Arsa Suyadnya, I Made; Shandyasa, I Wayan
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 evaluation process of information technology governance can be conducted using the domains within the COBIT 5 and ITIL V3 2011 frameworks. In this research, The process of evaluation was discussed to ensure the efficient functioning of information technology governance at PT. Bali Unggul Sejahtera using several domains from the COBIT 5 and ITIL V3 2011 frameworks. The aim of this research is to identify issues in the governance and information technology services at PT. Bali Unggul Sejahtera, determine the maturity level of IT processes using relevant domains from the COBIT 5 and ITIL V3 2011 frameworks through Gap Analysis and establish recommendations for activities as a reference for future improvements. In the COBIT 5 framework, researchers use sub-domains APO12, DSS01 and DSS05. In the ITIL V3 2011 framework, researchers use sub-domains Service Design 4.7, Service Operation 4.1 and Service Operation 6.2.1.3. The results of this research, The APO12 sub-domain COBIT 5 framework is currently at maturity level 3, the DSS01 and DSS05 sub-domains are currently at maturity level 4. In the ITIL V3 2011 framework, the sub-domains Service Design 4.7, Service Operation 4.1 and Service Operation 6.2.1.3 are currently at maturity level 4.). The results of this evaluation serve as recommendations for activities aimed at achieving the desired maturity level of 5 (Optimized).
RANCANG BANGUN SMART CLOSED HOUSE PADA PETERNAKAN AYAM BROILER Angga Dwipradipta, A A Gede; Dwija Ary Putra, I K J; Ardana, I P; Raka Agung, I G A P
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.p1

Abstract

This research aims to enhance the growth performance of broiler chickens through the implementation of a smart closed house system. The prototype coop, with dimensions of 150 cmx 80 cm x 50 cm, has been successfully realized by integrating DHT22 and MQ135 sensors withexhaust fan and water pump actuators. The system is controlled by ESP32 DEVKIT, Long Range(LoRa) communication, and the Internet of Things (IoT). Collected data is sent to the Firebaseand can be accessed through an Android application. Testing demonstrates that the sensors andactuators operate according to changes in temperature, humidity, and ammonia gas conditionsinside the coop. LoRa communication testing involves sending sensor data (temperature,humidity, and ammonia gas) at distances of 1, 10, 100, 300, 500, and 600 meters. From thetesting of LoRa transceiver data transmission, a character loss percentage of 0% is observed at10 meters, while at 100 meters, there is a character loss percentage of 17.64%. Integration ofdata into Firebase is successful and displayed through the MIT App Inventor application onAndroid devices. Testing of chicken weight data indicates an increase in broiler chicken weight inthe smart closed house coop compared to secondary data from conventional closed house coops.The testing period spans from day 7 to day 21 of the chicken's age. The highest recorded weightis 1031 grams, with the average weight for all chicken samples at the age of 21 days being 940grams, 2.84% higher than the standard data from conventional closed house coops.
RANCANG BANGUN ALAT MONITORING CUACA AREA PESISIR PANTAI DESA PACUNG, KABUPATEN BULELENG Teguh Imantara, K; Adna Shavira, Andin; Amrita, A A N; Shandyasa, 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.p10

Abstract

The weather changes due to global warming can impede human activities. This weather uncertainty has the potential to hinder local fishermen's operations, necessitating an Internet of Things (IoT) based weather monitoring system with strong wind notifications. This system utilizes the Telegram application platform and Thinger.io website to provide up-to-date weather information to the fishermen. One of the challenges faced by the fishermen of Desa Pacung is weather uncertainty. To address this, an IoT-based weather monitoring system with strong wind notifications was developed. This system employs the WeMos D1 R2 development board as the data processor and incorporates weather sensors such as an anemometer, wind direction sensor, DHT22 sensor, BH1750 sensor, and BMP180 sensor. Testing was conducted to compare the data from the monitoring system with BMKG data and evaluate the strong wind notifications. During the weather monitoring system testing, a comparison was made between the data from the weather monitoring system and BMKG data. The average difference between the system's data and BMKG data, measured every 5 minutes over 2 hours, was found to be due to topographical differences. The compared parameters were wind speed, light intensity, temperature, and humidity, with average differences for each parameter being 0.79 m/s, 26.7 Klx, 1.2?, and 5.3% respectively. A questionnaire was distributed to assess the usefulness of the device based on the opinions of 30 respondents. The average utility rating of the device reached 90.5%, categorizing the Desa Pacung weather monitoring prototype as highly suitable. The IoT-based weather monitoring system with strong wind notifications provides a solution for the fishermen of Desa Pacung in facing weather uncertainty.
UNJUK KERJA KOMUNIKASI NIRKABEL HALF-DUPLEX ANTARKENDARAAN MEMANFAATKAN NRF24L01 Amanda Saraswati, Ni Putu; Indra ER, Ngurah; Purnama, Fajar
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.p24

Abstract

This study investigates the efficacy of the affordable NRF24L01 wireless communication module in half-duplex mode for vehicle-to-vehicle (V2V) communication. The prototype integrated the NRF24L01 module with an ESP32 microcontroller and an OLED display. The study assesses the delay and packet success rate to uncover the module's attributes under half-duplex situations. This not only surpasses the mere collecting of data, but also emphasizes the practical limitations and strengths of the module. The project aims to achieve two main objectives: firstly, to gather empirical data that may be used to make well-informed decisions in the design of NRF24L01 applications, and secondly, to contribute to the broader examination of wireless communications protocols. It improves comprehension of the impact of half-duplex operation on the performance of the NRF24L01 module. By revealing the mechanics of half-duplex communication, it enhances the efficiency of NRF24L01 usage and facilitates the development of a better protocol.

Page 64 of 68 | Total Record : 677

 62   63   64   65   66 

Filter by Year

2014 2024


Reset
Filter By Issues
All Issue Vol 11 No 2 (2024): Jurnal SPEKTRUM Vol 11 No 1 (2024): Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM Vol 10 No 3 (2023): Jurnal SPEKTRUM Vol 10 No 2 (2023): Jurnal SPEKTRUM Vol 10 No 1 (2023): Jurnal SPEKTRUM Vol 9 No 4 (2022): Jurnal SPEKTRUM Vol 9 No 3 (2022): Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM Vol 9 No 1 (2022): Jurnal SPEKTRUM Vol 8 No 4 (2021): Jurnal SPEKTRUM Vol 8 No 3 (2021): Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM Vol 8 No 1 (2021): Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM Vol 7 No 3 (2020): Jurnal SPEKTRUM Vol 7 No 2 (2020): Jurnal SPEKTRUM Vol 7 No 1 (2020): Jurnal SPEKTRUM Vol 6 No 4 (2019): Jurnal SPEKTRUM Vol 6 No 3 (2019): Jurnal SPEKTRUM Vol 6 No 2 (2019): Jurnal SPEKTRUM Vol 6 No 1 (2019): Jurnal SPEKTRUM Vol 5 No 2 (2018): Jurnal SPEKTRUM Vol 5 No 1 (2018): Jurnal SPEKTRUM Vol 4 No 2 (2017): Jurnal SPEKTRUM Vol 4 No 1 (2017): Jurnal SPEKTRUM Vol 3 No 2 (2016): Jurnal SPEKTRUM Vol 3 No 1 (2016): Jurnal SPEKTRUM Vol 2 No 4 (2015): Jurnal SPEKTRUM Vol 2 No 3 (2015): Jurnal SPEKTRUM Vol 2 No 2 (2015): Jurnal SPEKTRUM Vol 2 No 1 (2015): Jurnal SPEKTRUM Vol 1 No 1 (2014): Jurnal SPEKTRUM More Issue