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Lektrokom: Jurnal Ilmiah Program Studi Teknik Elektro
Published by Universitas Kristen Indonesia
ISSN : -     EISSN : 26861534     DOI : https://doi.org/10.33541/lektrokom.v4i1
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Jurnal Lektrokom berisi makalah paper/karya ilmiah dosen, mahasiswa yang terkait dengan Bidang Energi Terbarukan, Control System, ICT, Telecommunication, Smart Energy System yang diterbitkan secara resmi pada Bulan September 2019 oleh Program Studi Teknik Elektro FT UKI. Tujuan Jurnal diterbitkan adalah untuk Publikasi Karya Ilmiah Dosen dan Mahasiswa dengan bidang spesifik Teknik Tenaga Listrik & Teknik Kontrol. Sedangkan cakupan atau fokus masalah yang dicakup adalah Energi Terbarukan, Sistem Kontrol & Cerdas, Smart Grid. Untuk penerbitan jurnal adalah 2 kali dalam setahun yaitu di bulan Maret dan September.
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 44 Documents
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Analisa Harmonisa Transformator Satu Fasa Berbeban Motor Arus Searah Melalui Rectifier Dan Simulasi Filter Pasif Berbasis MATLAB Di Laboratorium Program Studi Teknik Elektro Fakultas Teknik Universitas Kristen Indonesia Dangin, Helda Oktavianti; Silalahi, Eva Magdalena; Purba, Robinson
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 6 No. 2 (2023): Jurnal Lektrokom Volume 6 No. 2, September 2023
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v6i2.5172

Abstract

This study analyzed the harmonics of single-phase transformers loaded with Direct Current Motor (MAS) and rectifier using quantitative method approach. The purpose of this study was to identify the Total Harmonic Distortion (THDi) value in transformers and design passive filters to reduce harmonic levels if they do not meet the standards. The results showed that the measurement results, obtained THDi 31.01% in zero-load transformers, in transformers with MAS load with half-wave rectifiers, THDi by 79.35%, and in MAS load transformers with full-wave rectifiers, THDi by 46.40%, which exceeded IEEE 519-2014 standards. The results of the single tuned LC passive filter simulation showed that the MAS loaded transformer with a half-wave rectifier decreased harmonic level from the THDi value of 79.35% before using the filter, to 1.04% after using the filter and met IEEE 519-2014 standards. The harmonic level of MAS loaded transformer with full wave rectifier, before filtering, THDi 46.40%, but after filtering, THDi 37.98%, still exceeds IEEE 519-2014 standard.
Perancangan Pembangkit Listrik Tenaga Hibrida (PLTS Dan PLTMH-GRID) Di Desa Tiworiwu I Dan Desa Bea Pawe, Kabupaten Ngada, Nusa Tenggara Timur (NTT) Mardelin Kastela; Widodo, Bambang; Purba, Robinson
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 6 No. 2 (2023): Jurnal Lektrokom Volume 6 No. 2, September 2023
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v6i2.5173

Abstract

Tiworiwu I Village and Bea Pawe Village, located in Ngada Regency, have a renewable energy power plant, the Wae Roa Microhydro Power Plant (PLTMH), which is connected to PLN. The total power capacity generated from this power plant reaches 370 kW and the location of the plant is in Bea Pawe Village. This research was conducted with the aim of designing a Hybrid Power Plant (PLTH) by combining PLTMH-Grid and Solar Power Plant (PLTS). The level of solar radiation in Bea Pawe Village reached 5,531 kWh/m2. Thecapacity of the solar module used in this study was 325 Wp/module. The total total capacity reaches 525,200 Wp with the number of Photovoltaic (PV) modules as many as 1616 units and 53 inverter units with a capacity of 10 kW, so that the total inverter capacity reaches 530 kW. After conducting a simulation analysis of PLTH using HOMER software, it shows that the production of electrical energy produced by PLTH in Tiworiwu I Village and Bea Pawe Village is 3,131,745 kWh / year. The contribution of PLTS in energy production is 27.5%, the contribution of PLTMH is 51.5%, and the contribution of the electricity network (grid) is 21%. From an economic point of view, the estimated Net Present Cost (NPC) value of PLTH is much lower than that of PLTMH-Grid, with a difference of Rp. 5,304,430,000. Levelized Cost of Electricity (LCOE) at PLTMH-Grid is also lower, with a difference of Rp. 383.39 / kWh. Break Even Point (BEP) is expected to occur in about 5.05 years. The NPC and LCOE values of PLTH are lower than PLTMH-Grid PLN.
Analisa Ketahanan Baterai Lithium Ion pada Sepeda Listrik Roda Tiga Dewi, Dewi lestari; Susilo, Susilo; Widodo, Bambang
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 5 No. 1 (2022): Jurnal Lektrokom Volume 5 No. 1, September 2022
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v5i1.5243

Abstract

Lithium-ion (Li-Ion) batteries are rechargeable batteries used to store and provide electrochemical energy. The purpose of this research is to find out the durability of lithium-ion batteries on three-wheeled electric bikes. Research methods used using quantitative descriptive methods. The durability of the lithium-ion battery on an electric bike during use (discharge) varies depending on the intensity of use. Loadless use tends to last longer, while heavy use reduces battery life. The first use of a lithium-ion battery with a voltage of 64.1 V, then after 5 minutes of use the battery decreased to 62.8 V and so on with a variable time efficiency. This factor needs to be taken into account to maintain the performance and battery life and the capacity of the lithium-ion battery on a three-wheel electric bike may change during the recharge cycle. Initially, after full charging, the battery capacity will be maximum. However, every time a battery is recharged and used, there are chemical changes in the battery cell that can result in a decrease in capacity over time and the number of recharging cycles.
PEMODELAN DAN SIMULASI PEMBANGKIT LISTRIK TENAGA BAYU SISTEM ON-GRID MENGGUNAKAN MATLAB SIMULINK Cristian, Yosep; Silalahi, Eva Magdalena; Widodo, Bambang
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 7 No. 1 (2024): Jurnal Lektrokom Volume 7 No. 1, Maret 2024
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v7i1.5248

Abstract

In this study, the authors analyzed the variables of research in the form of wind turbine mechanical power results based on wind speed varies, as well as the results of current, voltage and power of permanent magnet synchronous generators based on wind speed varies. This study aims to determine the results of mechanical power output in wind turbines, the power output of generators, and the efficiency of On-Grid Power Plant Systems. The method used in this study uses literature study method and associative method. Where the method of literature study to collect literature on wind power plants, associative method to determine the relationship of several variables studied. Based on the research conducted on the simulation, the mechanical power output of wind turbine at minimum wind speed (cut-in) 3.38 m/sec is 27.68 W and at maximum wind speed (rated) reaches 103.6 W, and the voltage, current and power generated by the generator at minimum speed is 75.29 V, 2.81 A, and 9.89 W, while at maximum wind speed reaches 75.37 V, 2.7 A, and 77.54 W. The maximum efficiency generated by On-Grid PLTB is 75% at a maximum wind speed of 7.63 m/sec.
Perancangan Pembangkit Listrik Tenaga Surya Sistem On-Grid di Atap Gedung untuk Memenuhi Kebutuhan Energi Listrik Fakultas Teknik Universitas Kristen Indonesia – Jakarta Sitorus, Yofi Grecia; Widodo, Bambang; Purba, Robinson
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 5 No. 1 (2022): Jurnal Lektrokom Volume 5 No. 1, September 2022
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v5i1.5249

Abstract

This research is the design of an On-Grid Solar Power Plant (PLTS), at the Faculty of Engineering building of Universitas Kristen Indonesia (FT UKI). In analysing this design, both from the technical and economic sides and determining the Break Event Point (BEP), the HOMER application tool is used. The research method used is quantitative method, which includes collecting, analysing and presenting data in the form of numbers. After doing the HOMER simulation. PLTS consists of 407 solar panels with a total overall power capacity of 150,890 Wp (watt peak), as well as 16 units of inverters with a total overall capacity of 160,000 kW (kilowatt), and the total cost of all components is Rp. 1,245,305,649.95. In terms of economics, the cost savings from the Net Present Cost (NPC) value of this design is Rp. 830,000,000, saving the Levelised Cost of Electricity (LCOE) cost of Rp. 227.87/kWh (kilowatt hour), and saving Operation & Maintenance (O&M) costs of Rp. 142,000,000. From the results of this study, a BEP value of around 7.27 years was obtained.
Smart Door Lock Menggunakan Identifikasi Wajah dan Bot Telegram Sebagai Kendali Jarak Jauh Berbasis IoT Renwarin, Arlen; Susilo, Susilo; Widodo, Bambang
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 6 No. 2 (2023): Jurnal Lektrokom Volume 6 No. 2, September 2023
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v6i2.5259

Abstract

Technological advances are expected to be able to meet growing human needs. One of the things that needs to be considered is door security, and one method to achieve this level of security is by utilizing technology. This research will explore the working principles of door locks that adopt facial identification as an alternative to conventional keys. In this research, conventional keys will be replaced by a facial identification system that operates based on a specified command sequence. The data resulting from the facial identification process will be collected by the ESP32-CAM device, then transferred to the computer to be compared with the available data. The computer uses the Arduino IDE programming language. This research will adopt quantitative methods, which include literature study and direct observation as data collection techniques. The collected data will be analyzed to reach conclusions. In this research, Telegram is also used as a means of remote control which will connect automatically when the system is activated and will be processed by the NodeMCU-ESP8266. The results of this research show that the ESP32-CAM can identify faces with a response time of between 2.69 s – 3.24 s and the distance for face reading is up to a maximum distance of 80 cm. Test results on Telegram show that the response time obtained by the Telegram bot to control the key on the NodeMCU-ESP8266 is between 4.19 s – 4.48 s for each different location.
RANCANG BANGUN SISTEM PENGENDALI KURSI RODA LISTRIK PENYANDANG DISABILITAS BERBASIS MIKROKONTROLER ARDUINO UNO ATmega 328P Sabeilai, Jilva Krisye; Susilo, Susilo; Widodo, Bambang
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 7 No. 1 (2024): Jurnal Lektrokom Volume 7 No. 1, Maret 2024
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v7i1.5374

Abstract

For people with physical impairments, wheelchairs are the tools that are most widely used in their activities and are also the most widely used in hospitals. There are two types of wheelchairs that are often used, namely manual wheelchairs and electric wheelchairs. The electric wheelchair is designed using an Arduino Uno microcontroller, a set of buttons, and a motor driver circuit. Using the Arduino Uno as a microcontroller makes the system cost-effective and easy to access. Electric wheelchairs can move on a flat track using a pushbutton, which means the wheelchair can be moved easily. This research also uses the Arduino uno ATmega 328P as a wheelchair controller which is modified into two types, namely fast and slow according to the motor and battery capabilities. The performance test on this wheelchair includes the ability to lift loads with a maximum weight of 18 kg and subjects with an age range of 21 to 26 years with a maximum subject weight of 65 kg. From the test results, the wheelchair with a load of 11-18kg can move around 1.00 – 10.84 s. test results with subjects weighing 49-66kg moving around 1.00 – 8.00 s for each different weight.
ANALISA HARMONISA PEMBANGKIT LISTRIK TENAGA SURYA (PLTS) OFF - GRID 290 Wp DENGAN KOMBINASI BEBAN LINIER DAN NON LINIER DI GEDUNG FAKULTAS TEKNIK UKI - JAKARTA MENGGUNAKAN MATLAB SIMULINK Openg, Elisabeth Faustina Ene; Widodo, Bambang; Purba, Robinson
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 7 No. 1 (2024): Jurnal Lektrokom Volume 7 No. 1, Maret 2024
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v7i1.5658

Abstract

This paper presents the results of research on a 290 Wp (Watt-peak) Off-Grid Solar Power Plant (PLTS) at the Faculty of Engineering Building, Universitas Kristen Indonesia - Jakarta, aiming to investigate current harmonics on the load side and reduce the Total Harmonic Distortion (THDi) value using a single-tuned LC passive filter. Based on the measured current per order, calculations were conducted, revealing that the THDi on the load side (LED) amounted to 16,42%. The dominant harmonic currents were the 3rd order with a THDi of 5,7% and the 10th order with a THDi of 15,3%. According to the simulation results using MATLAB Simulink, the single-tuned LC passive filter was capable of reducing the THDi level on the LED from 16,42% to 1,81%.
Rancang Bangun Sistem Pengaman Kebocoran Liquefied Petroleum Gas (LPG) Dan Api Menggunakan Mikrokontroler NodeMCU ESP8266 Berbasis Aplikasi Blynk Beny, Frederik Beny Silamba; Bambang Widodo, Bambang Widodo; Susilo, Susilo
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 7 No. 1 (2024): Jurnal Lektrokom Volume 7 No. 1, Maret 2024
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v7i1.5688

Abstract

Gas leakage is also one of the security concerns in the surroundings of the house. It is not uncommon to find cases of LPG pipes leaks that result in deaths and losses to its users. To reduce the occurrence of gas leaks then designed a tool that functions as security on the use of automatically integrated LPG tubes. With the MQ-2 Sensor Test 30 trials at 18 trials that succeed at a distance of 25-31 cm. so that it can unlock the rotor on the regulator, the buzzer sounds and sends notifications to the Blynk application. with the IR-Flame Sensor testing 30 trial at 30 tries that work at the distance of 1-30 cm. The security system will only be activated if either of the sensors or both sensors detect a gas leak or a fire occurred when the gas leaks occurred.
SMART GARDEN SYSTEM SEBAGAI PENGENDALI DAN PEMANTAU RUANG GREENHOUSE BERBASIS INTERNET OF THINGS (IOT) Alberto Leo Agung; Widodo, Bambang; Stepanus
Lektrokom : Jurnal Ilmiah Teknik Elektro Vol. 7 No. 1 (2024): Jurnal Lektrokom Volume 7 No. 1, Maret 2024
Publisher : Prodi Teknik Elektro FT UKI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/lektrokom.v7i1.5829

Abstract

Rapid technological advances, especially in technology based on the Internet of Things (IoT). The Internet of Things creates a smart environment that provides intelligence in various fields, one of which is agriculture and plantations. Gardening activities are activities to cultivate or plant plants on an empty land or a planting medium. Gardening begins with planting plants, monitoring plant growth and caring for them by watering and fertilizing so plants can thrive. Use of Internet of Things (IoT) based technology to help promote plant growth. This research is focused on controlling and monitoring plants by using a planting medium, namely greenhouse. This control and monitoring is carried out by using an application that is connected to the internet connection which will then be stored in a database from the firebase platform. The application is made on a Mit App Inventor platform and installed on an Android device where the application is named IoTMonitoring which can assist in controlling and monitoring by taking into account the ideal values ​​needed by plants. Based on the results of monitoring carried out with the lowest conditions for temperatures reaching temperatures reaching 23.40C, air humidity 44.7%, soil moisture 543%, and light intensity 0 lumens. At the highest conditions for temperature reaching 38.3 0C, air humidity 82.7%, soil moisture 730%, and light intensity 15263 lumens obtained from the readings of the sensor values ​​in the greenhouse room. Meanwhile, the control is carried out by watering plants before 09.00 to maintain soil moisture and if the humidity is below the ideal value, for temperature and humidity the exhaust fan is in the ON position if the temperature is above 320C and the humidity is below 55%. And for grow lights are in the ON status if the light is below 30 lumens. Keywords: Internet of Things, Tanaman, Greenhouse, Android, Firebase, Mit App Inventor.

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