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Jurnal SPEKTRUM

spektrum
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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 23 Documents

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Search results for , issue "Vol 7 No 4 (2020): Jurnal SPEKTRUM" : 23 Documents clear

PERANCANGAN SISTEM PENGUNCIAN RODA SATU ARAH UNTUK MENGEMUDIKAN KENDARAAN RODA EMPAT DI JALAN MENANJAK Doni Helmahera; Dewa Made Wiharta; I Made Suartika
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Handbrake of a vehicle is the most important thing in a safety system in maintaining theposition of the vehicle in its stop position. The hand brakes function to brake or lock the rearwheels mechanically through the connecting rods and cables. The hand brake is also to parkthe vehicle on a down/climb road. In order to facilitate the ability of four-wheeled vehicles whenstopping on the ramp due to traffic jams, a special wheel locking system is used on the ramp. Ina one-way wheel shooting system when a four-wheeled vehicle stops on the ramp, the systemlocks the wheel when the wheel rotates slightly backwards without having to pull the handbrakelever. Therefore, this research aims to describe how the work of the one-way wheel lockingsystem when on the ramp of a four-wheeled vehicle. At the design of this system researchersmake prototype as a simulation system that is approaching similar to the shape of componentsof a four-wheeled vehicle. Researchers perform test system work when the prototype movesforward and backwards to find out if the system is capable of locking the wheels when the moveis backward and release the locking wheel when moving forward without using the hand brake.Using a one-way wheel locking system is expected to facilitate the driver in driving four-wheeledvehicles on the ramp without having to use the hand brake.

RANCANG BANGUN PROTOTYPE PLTMH DENGAN TURBIN PELTON SEBAGAI MODUL PRAKTIKUM I Gusti Putu Andhita Mahayana; Lie Jasa; I Gusti Ngurah Janardana
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Learned about the use of water resources as a micro hydro power plant is very importantto be carried out by Electrical Engineering students at Udayana University. At this time atConvertion Energy Laboratory there was not been a practicum about Mycro Hydro Power Plandue to the unavailability of guide practicum module and micro hydro power plant prototypes.Therefore in this research was design and build a Prototype of Microhydro Power Plan wich had18 buckets where had 5 cm width, 4,47 cm length, 1,6 height and the tickness was 0,28 cm.This prototype can made 4,5 L/s water discharge, 9,809 W Power, and the torque was 0,26 Nm. So that prototype had 1,48% efficiency. To make this prototype as a complete practicummodule was arranged practicum guide modules that was explain abaout Characteristic of MicroHydro Power Plan with Pelton Turbines.

PENGARUH SUDUT BUKAAN GUIDE VANE DAN TEKANAN AIR TERHADAP KECEPATAN PUTAR DAN DAYA OUTPUT PADA PROTOTYPE PEMBANGKIT LISTRIK TENAGA MIKROHIDRO DENGAN TURBIN CROSSFLOW I Wayan Arta Wijaya; I Made Dwi Mertadiyasa; I Made Suartika
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The pattern of power plants development in Indonesia is still relying on the availability of fossilfuels based energy sources. Meanwhile, Human are faced with a situation of depleting reserves offossil energy sources and increasing environmental damage due to the use of fossil fuels basedenergy sources. Renewable Energy development can be a solution to these problems. One of them isthe development of a Micro Hydro Power Plant. In the realization of Micro Hydro Power Plant inIndonesia, the crossflow water turbine type can be used. It is a type of impulse turbine with a goodcharacteristic at a low head for micro-scale generator capacity. This study analyzes the effect of guidevane opening angle and water pressure on rotation and output power of crossflow turbine. Theopening angle of the guide vane studied was 15º, 30º, 45º, 60º, 75º, and 90º in each water pressurecondition of 4 psi, 8.5 psi and 13 psi. The test is carried out by simulating direct measurements on theprototype of the Micro-hydro Power Plant that has been built. Every combination of parameterstested, the maximum value of rotational speed and output power is obtained at the guide vaneopening angle of 30º and water pressure of 13 psi. Turbine rotation values generated before and aftercoupled with a generator are 591.9 rpm and 522.7 rpm. The values of the generator rotation beforeand after the load coupled are at 3490 rpm and 2368 rpm. And the power value generated by thegenerator is 11.8 Watts.

ANALISIS EFESIENSI TRAFO DAYA TERHADAP PENGOPERASIAN BEBERAPA JENIS HARMONIC FILTER A.A Gede Maharta Pemayun; I Nym Budiastra; I W Rinas
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Nonlinear load is one of the causes of harmonics in utility systems. To reduce harmonicdistortion that appears, usually in utility systems, Harmonic Filters are operated such as:passive filters, active filters, series hybrid filters and hybrid shunt filters. Harmonic distortion thatoccurs will increase losses in the utility system. Losses that appear will affect the efficiency ofthe Power transformer being operated. From the analysis results, the order of the best to worstfilter efficiency is hybride filter (? = 97.26%), active filter (? = 96.72%) and passive filter (? =95.73%).

RANCANG BANGUN PERTANIAN STROBERI BERBASIS INTERNET OF THINGS I Komang Leo Puja Artana; Dewa Made Wiharta; Linawati Linawati
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Technological developments have been utilized in various fields of science, includingagriculture. Technology support in agriculture has been proven to be able to provide betterproduction results. In this study, an IoT-based agricultural environmental monitoring systemwas developed. The system was built using Raspberry Pi as a microcontroller and dataprocessing center, equipped with a moisture sensor and a DHT 11 temperature sensor. Thissystem was applied to a laboratory-scale strawberry farm. The system works automatically toregulate the temperature and humidity of the plant environment. If the temperature andhumidity of the strawberry plants do not meet the standards, the pump will automatically waterto keep the strawberry plants at the appropriate temperature and humidity. The system is alsoequipped with a notification feature so that strawberry farmers can obtain information throughtelegram media when the temperature of the strawberry plants is hot and the soil of thestrawberry plants is dry. This tool is also equipped with a webcam camera as an additionalfeature that serves to detect the level of ripeness of the strawberries in terms of the color of thefruit. The camera will detect the color of the strawberry, and if the strawberry is red, thestrawberry is categorized as ripe, and the farmer will get a notification via telegram in the formof a picture that the strawberry is ready to be harvested.

KARAKTERISTIK KINERJA PROTOTIPE TURBIN SNAIL-LIE PADA PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO I B GD Siwa Puja Bujawan; Lie Jasa; IWA Wijaya
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

The use of electrical energy is getting bigger along with the increasing population growth and variousfacilities that depend on electrical energy. However, the availability of electricity from PLN is notsufficient to meet the needs of the Indonesian people. Therefore, it is necessary to conduct researchon the utilization of potential renewable energy sources which are widely owned by our country,Indonesia, one of which is river flow and irrigation canals. For this solution, a PLTMH (Micro HydroPower Plant) is made, a small-scale power plant that uses hydropower as its energy source. Thepurpose of this study was to determine the performance characteristics of the prototype Snail-Lieturbine at MHP. The research method used is first to look for data by studying literature related toMHP and existing Micro Hydro Power Plant prototypes, secondly collecting data by observing anddirectly testing the parameters on the prototype of the Power Plant. Micro Hydro Power. This researchwas conducted to determine the characteristics of the Snail-Lie turbine prototype at a Micro HydroPower Plant, namely by measuring parameters based on the angle of the nozzle and nozzle armssuch as the turbine rotational speed, the rotational speed of the generator produced by the turbine,the resulting current and voltage then calculating the power from the turbine which has the highestrotating speed. The conclusion that can be drawn from the results of the measurement of theparameters is that the Snail-Lie type turbine the larger the nozzle arm angle, the faster the rotationspeed of the turbine and generator. The faster the speed of the turbine, the greater the current andvoltage generated. The faster the rotation speed of the turbine, the greater the torque produced.

AUGMENTED REALITY HYDRANT PEMADAM KEBAKARAN BERBASIS ANDROID Putri Sintya Dewi; Made Sudarma; Duman Care Khrisne
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Augmented Reality (AR) is a technology used to display a 3-dimensional animatedobject with marker as a medium for displaying 3-dimensional animation in real time. AugmentedReality Hydrant for Fire Extinguishers Based on Android is an application used for learningmedia in the introduction of fire extinguishers with the aim of making it easier for the public orfirefighters to find out their form and function through this application. The Fire ExtinguisherHydrant Augmented Reality application is made in several stages, namely identifying problems,determining goals and objectives, analyzing needs, designing systems, designing designs,making systems and testing systems. This Android-based Augmented Reality Hydrant candisplay several Hydrant objects or Fire Extinguishers and display information about theseobjects.

RANCANG BANGUN PROTOTYPE PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO MENGGUNAKAN TURBIN CROSS-FLOW I Putu Andrean Wiranata; I Gusti Ngurah Janardana; I Wayan Arta Wijaya
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Many hydropower plants today are built on a large scale. Meanwhile, the construction of thislarge-scale power plant requires a very large area and a very high head. This has an impact onthe difficulty of distributing electrical energy to remote areas, on the other hand, there are stillmany small rivers in remote residential areas that have not been fully utilized as an alternativeto potential sources of electricity generation. So to overcome this, through this research aprototype Micro Hydro Power Plant (PLTMH) was made using a Cross-Flow turbine which ofcourse can be applied to rivers that have a fairly low flow and head. In this study, the results ofthe calculation of the PLTMH prototype parameters with a Cross-Flow Turbine were designedat an effective head of 6 meters. The design of the Cross-Flow Turbine uses a runner outerdiameter of 0.15 meters, a runner inner diameter of 0.10 meters, and the number of blades is18. The test results obtained 574,6 rpm of turbine rotation before coupled with the generator;489 rpm rotation of the turbine after coupling the generator; 3309.2 rpm of turbine rotation,36.52 V output voltage at no load, and 386.4 rpm maximum turbine rotation; 2584.4 rpmmaximum generator rotation; 28.18 V maximum output voltage; 0.422 A maximum outputcurrent; 10.59 Watts of maximum output power; 0.312 Nm of maximum torque; 8,026%maximum efficiency at load.

RANCANG BANGUN SISTEM MONITORING KETINGGIAN AIR BERBASIS ANDROID MENGGUNAKAN TRANSISTOR WATER LEVEL SENSOR Nyoman Arun Wiratama; Dewa Made Wiharta; Ni Made Ary Esta Dewi Wirastuti
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

So far, controlling the water level in the dam is still done manually by utilizing humanoperators, where in this case there are often mistakes in making decisions. In this research, asolution is offered in the form of an Android-based Water Level Monitoring System Design usinga Water Level Sensor Transistor. There are 4 transistor water level sensors integrated withArduino, ESP8266 module, camera module, relay, automatic water faucet, and LCD. Eachsensor is used to determine the water level with 5 different states, namely Zero, Safe, Warning,Alert, and Danger. If the water level touches one of the sensors, the input given by the sensor willautomatically be processed by Arduino which will then trigger a relay to open / close the waterfaucet and the value and status of the water level will be displayed on the LCD. After that thecamera will take pictures of the water level then the ESP8266 module which functions to connectto an internet connection will help the tool to send water level data in the form of images, status,and water level values to the Android application and the Telegram application that have beeninstalled on the Smartphone. The results obtained from this study are the design of the waterlevel monitoring system can run well in accordance with expectations, but there are stilldeficiencies that can be overcome with several developments so that the design of the tool getsbetter results, for example by using a servo motor on the floodgate which later can make the toolwork system even better.

DISAIN PERBANDINGAN KARAKTERISTIK TURBIN SNAIL-LIE 4 SNAIL DAN 8 SNAIL PADA PROTOTYPE PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO (PLTMH) Ida Bagus Dwiki Dharma Putra; Lie Jasa; I Wayan Arta Wijaya
Jurnal SPEKTRUM Vol 7 No 4 (2020): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

is one of the regions with potential renewable energy sources, includinghydropower, namely the Micro Hydro Power Plant (PLTMH). The main problem with hydropoweris the flow of water that does not flow continuously throughout the year. A micro hydro that isplaced in a certain location requires a turbine in accordance with the characteristics of theexisting location. In this study, a turbine was designed to obtain a new type of Snail-Lie turbinethat accommodates all existing location parameters. In this turbine, there are variations in theform of gaps or spaces in each particular blade to trap water so that it can increase the torque,where this torque will affect the turbine output. The research method used is to findmathematical models of the Snail-Lie 4 Snail and 8 Snail turbines, make a prototype model tobe tested in the laboratory, make a real Snail-Lie turbine model for field trials. The resultsshowed that the addition of the number of snails from 4 snails to 8 snails caused the turbine'sperformance to increase, this is because the number of snails will affect the performance of theturbines, because the snail functions as a water trap so that it can be used as thrust for theturbine when it rotates. The highest output obtained is at the nozzle position 0° and the nozzleangle of 20° using a snail-lie 8 snail tubing which produces 166.9 rpm turbine rotation, 1086.8rpm generator rotation, 0.707 volt generator voltage, 0.189 watt generator power, and torqueamounting to 0.01 Nm, and an efficiency of 20.8%. The low efficiency value obtained in thesystem is 20.8% because the water entering the turbine is not comprehensive, the slip occurs inthe turbine that is coupled with the generator through the fan rope and the generator has its ownefficiency.

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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

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Abstract

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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