Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

Jurnal SPEKTRUM

spektrum
Website

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

39 40 41 42 43

RANCANG BANGUN AKUAPONIK BERBASIS INTERNET OF THINGS I Made Kris Widiantara; Linawati Linawati; Dewa Made Wiharta
Jurnal SPEKTRUM Vol 8 No 1 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Currently technology is growing so that many tools are created, especially reforms inagriculture. Aquaponics is a combination of hydroponic and aquaculture techniques intoaquaponics techniques. This aquaponics technique only uses water as a growing medium.Cultivating aquaponics does not require a large area of land, it can be done in the yard of ahouse that does not have a large area. Currently aquaponics techniques have developed,especially in modern agriculture because this aquaponics technique will use an Internet ofThings (IoT) based system. Internet of Things (IoT) is a concept in which the virtual world of information technology blends with real objects in the real world. In other words, the Internetof Things (IoT) is a concept which aims to expand the benefits of continuously connectedinternet connectivity. This system is built using the Node Mcu Esp8266 microcontroller as thecontrol center and uses the Raspberry Pi 3 type B mini PC as visual notification and is equippedwith a pH sensor 4502C, DS18B20 temperature sensor, Servo Motor, SRF05 sensor. A plantcommonly used in aquaponics is pakcoy, which is one of the most widespread vegetables inAsia. While the fish used in aquaponics techniques are freshwater fish, one of which is parrotfish. In testing the pH sensor is carried out with 3 conditions, namely when the pH is normal,acidic and alkaline on the sensor test detects normal pH, acid and alkaline approaching theresults of the pH meter comparison tool, then the water level test is carried out with 2 conditions,namely when the water is normal and reduced by using a ruler comparison tool, where thesensor has a little detecting error, on testing the water temperature sensor using a thermometercomparator has an error detecting the state of the aquaponic water temperature. When testingthe chat feature is done by typing / getdata, the application will send a chat with sub watertemperature, water level, water pH, then testing the camera feature is done by typing /getpHoto, the application will send a picture of the condition of the aquaponics.

ANALISA PENGARUH PENGGUNAAN CONTROLLER PADA FILTER AKTIF SHUNT TERHADAP PEREDAMAN DISTORSI HARMONISA I Made Suartika; I Wayan Rinas
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The types of filters used to reduce harmonic distortion are passive filters, active filtersand hybrid filters. The type of filter that usually uses the system controller is an active filter. Inthis study, an analysis of current harmonic distortion from the simulation results using matlabhaccording to the IEEE Std 519-1992 standard in existing conditions, active filter operatingconditions, active filter operation using PID controllers and active filters based on Fuzzy LogicController. The simulation results of the three models used show that the resulting THDii stillmeets the IEEE Std 519-1992 standard, namely the THDi is still 8%, the simulation results forPID-based active filters are: pasa R = 2.89%; S = 2.34%; T = 3.23% and based on fuzzy logiccontrollers are: R = 0.15%; S = 0.11%; T = 0.13%.

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.

ANALISIS UNJUK KERJA PLTD-G 40 KW BERBAHAN BAKAR MINYAK DIESEL DAN PELET BIOMASSA (STUDI KASUS DI PT INDONESIA POWER BALI) Yohana Fransisca Sarumpaet; I Nyoman Satya Kumara; Wayan Gede Ariastina
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Fossil-fueled power plants are still the world’s backbone in terms of electricitygeneration, including in Indonesia. This will continue to increase due to the high demand ofelectricity. Meanwhile, the amount of fossil fuels is limited and fossil fuel creates exhaustemissions. Therefore, it is required to look for clean and renewable electricity generationmethods. The development of Diesel Gasifier Power Plant carried out by PT Indonesia PowerBali aims to reduce the use of diesel by using syngas obtained from gasification of biomasspellets. This study analyzes the performance of the Diesel Gasifier Power Plant at PT IndonesiaPower Bali. The results show that the use of syngas reduces the use of diesel, this is indicatedby the fuel consumption ratio between diesel and syngas, which is 56% diesel and 44% syngas.The results also show that the Diesel Gasifier Power Plant has an efficiency of 63% and acapacity factor of 58%.

ANALISA PENGARUH KEMIRINGAN HEAD DAN VARIASI SUDUT BLADE TURBIN ULIR TERHADAP KINERJA PLTMH I Putu Wahyu Indra Wedanta; Wayan Arta Wijaya; Lie Jasa
Jurnal SPEKTRUM Vol 8 No 1 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Bali has many waterfalls which can be used as Micro Hydro Power Plant (MHPP). Ituses 2 types of turbines, one of them is screw turbine or Archimedes screw. Screw turbine isstill rare, therefore a MHPP modeling needs to be made to obtain specific data. This study willdiscuss the analysis of the influence of the Head Slope and the Variation of the Angle of theBlade of Turbine to Performance of the MHPP, to determine the torque, turbine rotation,voltage, current, power and rotation produced by the generator. Best measurement results onthe slope of the head 400 and variations in blade angle 280. Voltage, current and powerobtained by 73.8 V, 148.9 A and 10.98882 W. At the turbine speed before coupling, thegenerator is obtained 596 rpm and 304 rpm after coupling, while the generator rotation is 3863rpm. The resulting torque and efficiency are 0.3492 Nm and 14.16%.

STUDI ANALISIS SETTING FILTER AKTIF TERHADAP PENINGKATAN KUALITAS DAYA LISTRIK DI GEDUNG PERKULIAHAN FAKULTAS TEKNIK UNIVERSITAS UDAYANA JALAN PB SUDIRMAN I Gede Dyotha Yogadipha Bagas; I Wayan Rinas; I Wayan Arta Wijaya
Jurnal SPEKTRUM Vol 7 No 3 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Harmonics are disturbances in the electric power system in the form of distortions incurrent and voltage waves caused by the formation of waves with a interger multipliedfrequency of the fundamental frequency. Total Harmonic Distortion (THD) is the amount of theeffective value of waves affected by harmonics that affect the occurrence of electrical powerlosses. This study discusses the analysis of current THD in the lecture building at the Faculty ofEngineering, Udayana University, Jalan PB Sudirman. The simulation is carried out underexisting conditions and when operating an active filter will show the results of the THD currentthen adjusted to the IEEE 519-2014 standard. Then an analysis of power losses due toharmonics is performed. THDi in the existing conditions for phase R = 15.44%, S = 15.6%, andT = 11.42% while the active filter operation is at phase R = 2.41%, S = 2.69%, and T = 2.99%.Power losses due to haronisa interference under existing conditions were 12,6 % and on theactive filter operating conditions were 0,037 %.

ANALISIS PENGARUH PENGATURAN DAYA REAKTIF UNTUK FILTER HARMONIC TERHADAP PERUBAHAN THDi PADA SISTEM TENAGA LISTRIK I Wayan Rinas; A. A Gede Maharta Pemayun; I Made Suartika
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Harmonic filters are used to reduce harmonic distortion in electric power systems. Inactive filters, usually the required reactive power (Qc) can be adjusted. In this study, an analysisof the Qc setting on the Active filter was carried out to determine the effectiveness of the filter sothat the THDi (total harmonic distortion) was obtained which was in accordance with the IEEE519-2014 standard (8%). The results of the analysis of the smallest Qc which can still reduceharmonic distortion when meeting the IEEE 519-2014 standard is Qc 55% of the maximumreactive power with THDi for pasa R = 7.38%; S = 7.81%; and T = 5.94%. Control is needed toadjust the Qc on the filter, because the Qc value will continue to change according to theelectric load being operated.

APLIKASI SISTEM PAKAR DIAGNOSA PENYAKIT GASTROENTERITIS BERBASIS ANDROID DENGAN METODE CLASSIFICATION AND REGRESSION TREE I Dewa Made Krisnayana; Putu Arya Mertasana; Made Sudarma
Jurnal SPEKTRUM Vol 7 No 3 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Gastroenteritis is a disease that attacks the body's digestive system, especially in thesmall intestine and stomach through viruses and bacteria. In addition to its transmission causedvirus and bacteria, it can also caused by unhygienic food and drink. However, people generallyequate gastroenteritis with diarrheal disease, causing medical mismanagement that can befatal. Therefore, this research trying to build an Android based application that can help peoplein diagnose gastroenteritis. So in this research, the application was build using ClassificationAnd Regression Tree using an Android platform and flutter extension. This research usinghistorical data of 780 patients with 2 classes of disease, namely gastroenteritis and gastritis.The testing results is done to determine the peformance of application such as accuracy,precision , and recall of the application in diagnosing disease. According to confusion matrixtesting results, the application that was build able to diagnose gastroenteritis and gastritisdisease by obtaining an Accuracy of 85.1 %, Precision of 84 %, and Recall (applicationsensitivity in diagnosing) of 98 %.

RANCANG BANGUN OBJECT DETECTION PADA ROBOT SOCCER MENGGUNAKAN METODE SINGLE SHOT MULTIBOX DETECTOR (SSD MOBILENETV2) Cokorda Gde Wahyu Pramana; Duman Care Khrisne; Nyoman Putra Sastra
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Artificial intelligence or AI is a technology that emphasizes machine intelligence in respondinglike humans, developed to help support human work. AI has widely applied in various fieldssuch as industry, medical, education, business, and robotics. The development of AI in the fieldof robotics produces autonomous robots, one example is the KRSBI-Beroda soccer robot. Thisresearch discusses the application of AI in the design of object detection systems using thesingle-shot multibox detector (SSD) model on the KRSBI-Beroda soccer robot. This study aimsto produce an AI model in the form of an artificial neural network (ANN) implanted in the soccerrobot to distinguish between ball, goal, robot, and obstacle objects. This object detection systemwas built using a deep learning method assisted by the TensorFlow Object Detection APIframework using the MobileNetV2 SSD model which is run using the python programminglanguage on the NVIDIA Jetson Nano board which is integrated into the C922 Pro webcamcamera. The model was built using a dataset of 977 images consisting of 3064 objects thatwere trained as many as 200,000 steps on Google Colaboratory. The results showed a modelwith an average mAP of 0.80 with an average total loss of 1.5. Validation of the model resultedin a success rate of object prediction with an average accuracy of up to 98.45%.

RANCANG BANGUN SISTEM PEMANEN ENERGI ANGIN EXHAUST FAN TURBIN ANGIN SUMBU HORIZONTAL DENGAN PENGARAH ANGIN (WIND TUNNEL) Reki Aji Saputra; Cokorde Gede Indra Partha; I Wayan Sukerayasa
Jurnal SPEKTRUM Vol 8 No 2 (2021): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Energy consumption in the current era is increasing and only focuses on the use of nonrenewableenergy in this case fossil energy, namely fuel oil which is limited in number and theprice is increasing. One solution is to use alternative energy that can be renewed or renewable,including water energy, solar energy, biomass energy, wind energy and others. Renewableenergy which has been widely used as electrical energy by developed countries is wind energy,in addition to the use of natural wind energy as alternative energy, there is also artificial wind,namely the waste energy from the exhaust fan can be used as a source of energy. analternative energy source option for Wind Power Plant (WPP). The characteristics of the windoutput from the exhaust fan itself spread the wind direction so that the wind energy that can becaptured by the wind turbine is less than optimal, so it is necessary to install a wind tunnel thatis useful for directing or focusing the wind distribution In this study, a wind tunnel has beendesigned which is placed in the direction of the exhaust wind output of the horizontal axis windturbine exhaust fan. With the addition of a wind tunnel, it can increase the wind speed from 3.3m/s to 5.8 m/s or an increase of 76% and power harvesters increase from 0.38 Watt to 0.96Watt or an increase of 153%.

Page 41 of 68 | Total Record : 677

39 40 41 42 43

Filter by Year

2014 2024

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

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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

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