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ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika
Published by Institut Teknologi Nasional Bandung
ISSN : 23388323     EISSN : 24599638     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering Engineering
Jurnal ELKOMIKA diterbitkan 3 (tiga) kali dalam satu tahun pada bulan Januari, Mei dan September. Jurnal ini berisi tulisan yang diangkat dari hasil penelitian dan kajian analisis di bidang ilmu pengetahuan dan teknologi, khususnya pada Teknik Energi Elektrik, Teknik Telekomunikasi, dan Teknik Elektronika.
Arjuna Subject : -
Articles 848 Documents
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Enhancing Isolation Forest with Threshold-based Filtering and LSTM for Attendance Anomaly Detection ZULLVAN SUGIANTORO; REGINA LIONNIE
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 2: Published April 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i2.135

Abstract

The research discusses the simulation of a GPS-based attendance coordinate point authenticity verification system. Verification is carried out using the Isolation Forest model to detect outliers based on distance anomalies between entry and exit attendances and total path anomalies combined with Threshold-based Filtering to determine the normal distance threshold, and LSTM to analyze temporal patterns based on the total recorded path. The test results show that the combination of Threshold-based Filtering, Isolation Forest, and Long Short-Term Memory (LSTM) is able to detect invalid coordinate points accurately, from this combination obtained accuracy results of 99.74%, precision 99,49%, recall 100% and F1-score 99,74%. These results prove that the performance of the model combination (hybrid) is superior to using each component model separately.
Comparison of Clutter Reduction Methods for Buried Object Detection in Heterogeneous Soil QUEEN HESTI RAMADHAMY; ZUMAR AHMAD; BAIK BUDI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 2: Published April 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i2.209

Abstract

A GPR was conducted in this study using a Vector Network Analyzer (VNA) connected to two antennas to detect buried metals. The target was located 17 cm below the ground surface. The detection process was carried out to obtain radar images, namely A-scan and B-scan. Clutter reduction was performed using three methods: weighting, averaging, and singular value decomposition (SVD). This study reviews the performance of clutter-reduction methods under heterogeneous soil conditions. Qualitatively, all methods clarified the target and reduced clutter in the radar image. Quantitatively, the Signal-to-Clutter Ratio (SCR) is calculated after clutter reduction. In terms of results, the weighting method increased the SCR to 28.81 dB, while the averaging method increased it to 25.31 dB. Meanwhile, the SVD method only provided a small increase to 4.45 dB.
Subject Index and Author Index - INDEX -
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 2: Published April 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i2.%p

Abstract

Subject Index and Author Index
Local Weather Monitoring using WSN and IoT as an Early Warning for Extreme Weather RAHMI HIDAYATI; KARTIKA SARI; IRMA NIRMALA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 2: Published April 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i2.154

Abstract

This research develops a local weather-monitoring system based on the Internet of Things (IoT) and a Wireless Sensor Network (WSN), employing four nodes to collect real-time data on temperature, humidity, air pressure, wind speed, and rainfall. Each node transmits its data to Firebase, where it is displayed on a web dashboard and used to trigger early-warning notifications via Telegram. Testing results show that the anemometer recorded an average deviation of 0.33 km/h, while the BME280 demonstrated high accuracy across three parameters: a 0.21°C (0.74%) deviation for temperature, 0.83% (1.31%) for humidity, and 0.28 hPa (0.02%) for air pressure. The system also exhibited stable data synchronization and rapid alert response times. The testing results demonstrate the potential of a multi-node approach to capture local microclimate variability and indicate its suitability for further development in machine learning–based predictive models.
Resistance Of The Grounding System In Residential Houses In Preventing The Hazard Of Electric Shock To Humans Using Soil Treatment AYU FITRIANI; JHONI HIDAYAT; NURMAHENDRA HARAHAP; ERIANSYAH SAPUTRA HASIBUAN; NURHAFNI CAROL; JOEL PANJAITAN; SOFYAN AHWAR SYAHPUTRA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 2: Published April 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i2.221

Abstract

Electric shock is a fatal risk in domestic environments that require an effective grounding system. Because high resistance can weaken the protective function, optimization through the use of additives is the main focus of this study. This study evaluates the effect of electrode rod planting depth on moist and dry soil types using a mixture of additives. The method used is the three-point method with planting media in PVC pipes. Test results in this study require improvements in the minimum electrode rod planting of at least 1 meter in the ground and with maximum and effective results it is recommended to be 2.44 meters (8 feet) into the ground. And in dry soil the electrode rod needs to be buried up to 3.5 meters to get a resistance value below 5 Ω according to PUIL standards.
Spatial-Temporal Performance Variability of 1 kWp Polycrystalline PV Systems across Indonesia’s Diverse Climate Zones MUHAMMAD IRSAN; NURUL CHAIRUNNISA NOOR; MUHAMMAD HAFIS
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 2: Published April 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i2.170

Abstract

Indonesia has enormous solar energy potential, but local climate variability often causes deviations between design estimates and actual performance. This study aims to analyze the effect of climate parameters on the performance of a 1 kWp solar power system in six different climate zones through PVsyst simulation. The results show significant variations in annual energy production, with the highest values in Makassar (1,453 kWh/kWp) and Ternate (1,452 kWh/kWp), while the lowest is in Jakarta (1,293 kWh/kWp). This difference is triggered by the diffuse radiation (DIF) ratio, which reaches 1,001.4 kWh/m² in Jakarta due to pollution and high cloud cover, which reduces the Performance Ratio (PR) to an average of 76%. This study concludes that microclimate factors, particularly the DNI/DIF ratio, are more decisive for system efficiency than daily average radiation alone.
Evaluation of Staged Under Frequency Load Shedding Strategy for Generator Trip Events at Arun Substation Using DIgSILENT Powerfactory M. FITRA WALDI; MUHAMMAD DAUD; SELAMAT MELIALA; SALAHUDDIN SALAHUDDIN; TEUKU MULTAZAM
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 2: Published April 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i2.231

Abstract

Frequency stability is a key indicator of power system reliability, as disturbances such as generation loss can cause rapid frequency decline and potentially lead to a blackout. This study evaluates the effectiveness of a load shedding scheme using an Under Frequency Relay (UFR) at the Arun Substation through dynamic simulation in DIgSILENT PowerFactory. The scenario involves a sudden loss of generation, comparing conditions without and with UFR. Results show that without UFR, a 48.421 MW power loss causes the frequency to drop below 42 Hz in less than 16 seconds, leading to system failure. With a two-stage UFR scheme (27.6 MW at 49.5 Hz and 28.4 MW at 49.2 Hz), the frequency decline is arrested and the system stabilizes at 50.12 Hz within about 3 seconds. Thus, the UFR scheme is effective in maintaining system stability.
Integration of Cameras and IoT for Parking Capacity Management Using the YOLOv8 Algorithm HAYADI HAMUDA; ANJAR SETIAWAN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 3: Published July 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i3.405

Abstract

Parking management in the mosque environment still faces challenges because vehicles are not being monitored properly. This research develops a parking capacity monitoring system based on cameras and the Internet of Things (IoT) using the YOLOv8 algorithm to automatically detect vehicles. The system is built with Python and digital image processing to detect vehicles entering and exiting. Parking capacity information is displayed in real-time thru a 20x4 I2C LCD and a web interface, and is stored in the Firebase Realtime Database. Testing using the black-box method shows that the system runs well, while the System Usability Scale (SUS) evaluation received a score of 90, categorized as very good. The vehicle detection results achieved an accuracy of 66.67% under optimal lighting conditions. This system is expected to help make mosque parking management more effective and efficient.
Master-Slave Synchronization in Off-Grid Solar Microgrids: Genset and Inverter Configurations IGNATIUS RIYADI MARDIYANTO; MUSRINAH MUSRINAH; SRI PARYANTO MURSYID; SRI UTAMI; WILDAN ARASSID; RIDWAN NURDIN; AGOENG HARJATMO RAHARDJO; TJATUR UDJIANTO; APIP PUDIN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 3: Published July 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i3.274

Abstract

The research analyzes the synchronization performance of off-grid solar AC microgrids by comparing genset-based and inverter-based master-slave configurations. Stability and power quality evaluations were conducted through MATLAB/Simulink simulations and experimental validation. Test results show that the genset-master configuration produces stable synchronization (220V/50Hz), while the inverter-master configuration experiences initial voltage instability. However, by optimizing the power capacity ratio between the master and slave units to 10:1 and implementing a properly designed PWM modulation, the system successfully achieves stable operation. An IoT-based monitoring system using ESP32 and PZEM-004T sensors provides real-time data to validate these findings, confirming that while the inverter-based master configuration is feasible, precise design parameters are required to ensure reliable synchronization
Design of Microstrip-Embedded Building Structure Antenna for Smart City IoT Networks LOMPO RAMOS EMAKARIM; NURMAYANTI ZAIN; FARHAN REZKI ARIFIN; MUH. IRHAM M; UMMU KHALSUM; ABDUL HAKIM UDIN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 3: Published July 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i3.347

Abstract

Building-integrated antenna technology offers a promising approach for IoT deployment in smart city. This study proposes a conceptual framework for microstrip antenna embedded within metal structural elements. It aims to analyze the electromagnetic behavior and performance of these antennas for IoT applications. The methodology combines analytical modeling with HFSS simulations to evaluate key parameters including return loss, VSWR, gain, and radiation patterns within the 700 MHz sub-GHz IoT bands. Simulation results demonstrate that the concrete column structure supports effective antenna operation, achieving a return loss of -17.15 dB and a VSWR of 1.32. Despite the inherent attenuation, the antenna maintains a positive realized gain of 1.44 dBi and a sufficient broadside radiation pattern. The study concludes that such embedded antennas offer a viable solution for smart city IoT infrastructure.

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