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ELPOSYS: Jurnal Sistem Kelistrikan
Published by Politeknik Negeri Malang
ISSN : 2407232X     EISSN : 24072338     DOI : https://doi.org/10.33795
Core Subject : Science, Engineering,
Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering
ELPOSYS adalah jurnal nasional yang menyediakan sumber informasi ilmiah bagi peneliti dan akademisi, lembaga penelitian, lembaga pemerintah, dan industri. Kami menerbitkan research papers, review articles, dan case studies yang berfokus pada bidang ketenagalistrikan serta topik yang terkait. Semua makalah di-review oleh setidaknya dua reviewer. ELPOSYS diterbitkan oleh UPT – P2M Politeknik Negeri Malang dan diterbitkan tiga kali setiap tahun, yaitu Bulan Februari, Juni, dan Oktober. Artikel yang dipublikasikan bidang ilmunya sesuai atau relevan dengan topik-topik Jurnal ELPOSYS yang meliputi bidang (namun tidak terbatas pada): - Pembangkit, - Distribusi dan Transmisi Daya, -Konversi Daya, - Sistem Proteksi, - Transformator, - Teknologi Instalasi Listrik, - Kualitas Daya, - Aplikasi Teknologi Informasi pada Sistem Daya, - Aplikasi Kontrol Cerdas pada Sistem Daya, - Teknologi Pembangkitan berbasis Energi Terbarukan, - Mesin-mesin Listrik, - Pemodelan dan Simulasi Sistem Daya, - Elektronika Daya, - Pengukuran Besaran Listrik, - Kestabilan Sistem Daya, - Topik lain yang terkait.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 184 Documents
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Pemeliharaan Tahunan Pressure Transmitter Area Steam Generation Industri Petrokimia di PT. X Hafiz, Muhammad; Novan Akhiriyanto
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.6424

Abstract

Monitoring steam generation systems in the petrochemical industry is essential because small pressure changes can significantly affect product quality and pose safety risks. This study focuses on calibrating the Endress+Hauser Cerabar M PMC41 pressure Transmitter at PT. X, a leading Indonesian fatty alcohol and oleochemical producer. Calibration was performed to ensure accurate pressure measurement of steam generation processes using a zero calibration technique to correct reading Errors. Measurement data were collected before and after calibration at 0%, 25%, 50%, and 100% pressure levels. The initial Error in pressure measurement was 31.799 bar (4.47%), while the current output Error was 16.76 mA (3.8%). After calibration, these Errors reduced to 30.266 bar (0.72%) and 16.023 mA (0.115%), respectively. These results indicate a significant improvement in the Transmitter’s performance, aligning with the International Electrotechnical Commission (IEC) No. 13B-23 standards. The calibration process effectively minimized measurement Errors, ensuring precise monitoring of pressure parameters in the steam generation system and maintaining operational stability. Accurate pressure control is crucial to optimizing production efficiency and maintaining safety standards at PT. X.
Desain Miniatur Plant Simulator Pompa Air Kotor Panel Kontrol Relai Kontaktor Susilo; Nanang Setio Pambudhi; Agus Andrianto; Dimas Eriyanto; Milzam Brillian Santanaa
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.6989

Abstract

Wastewater management played a crucial role in maintaining environmental cleanliness and health, where water pumps held a vital position. However, manually operated pump systems were often inefficient and posed potential health risks if failures occurred. This research aimed to design and create a miniature plant simulator for wastewater pumps utilizing a relay contactor control panel. This miniature plant was specifically designed to automatically simulate the operation of a wastewater pump system, offering a solution to replace the often inefficient manual methods. The research process commenced with identifying the main components required, such as a three-phase induction motor, contactors, thermal overload relays, and associated sensors. Subsequently, the design and construction of both the simulator and its control panel were meticulously carried out. Implementation involved comprehensive testing of each component's functionality and the overall system's integrity, including individual component testing and evaluation under simulated system failure conditions like overload and no flow. The research results clearly demonstrated that the built miniature plant simulator functioned effectively as expected. The automatic control system employing relay contactors proved efficient and safe in operating the water pump, capable of managing various water levels and detecting abnormal conditions such as overload and no flow. This miniature plant could serve not only as a valuable learning tool but also as a promising prototype for the development of larger and more complex wastewater pump control systems in the future.
Integrasi IoT pada Mesin Roasting Kopi Fluidized Bed Wijaya Kusuma; Rahman Azis Prasojo; Ibrahim; Lukman Hakim; Muhammad Arief Furqon; Mochammad Erfian Ramadhan
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.6990

Abstract

This research presents the development of an electric coffee roasting machine using the fluidized bed method, integrated with an Internet of Things (IoT)-based monitoring and control system. The system was designed to address limitations of previous prototypes that lacked remote temperature monitoring and automation. The roasting chamber utilizes a hot air stream to create fluidization, enabling uniform bean agitation and heat distribution. Key hardware includes a thermocouple sensor (MAX6675), an ESP32-S3 microcontroller, an AC light dimmer for heater control, and an electronic speed controller (ESC) for blower regulation. A user interface is provided via a TFT LCD screen and a custom mobile application connected through Firebase Realtime Database. Roasting profiles—consisting of bean type, target roast level, and batch weight—can be selected and executed automatically. The system was tested with various bean weights (50–250 g), demonstrating accurate temperature control, stable fluidization, and consistent roast levels. Results showed a temperature deviation below ±1°C from reference measurements, and all tests produced medium roast coffee with uniform color and aroma. The integration of IoT improves usability, process reliability, and potential scalability for small-scale roasting operations.
Sistem Monitoring Energi Listrik 3 Fase Berbasis IoT dan Firebase Muhtadi, M Zaky Zaim; Ranolat, Susana; Pujianto
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.7206

Abstract

This research develops an Internet of Things (IoT)-based three-phase electrical energy monitoring system using Firebase for real-time energy management at PEM Akamigas Campus. The system integrates PM1200 Schneider power meter, ESP32 microcontroller, RS485 to TTL converter, and Firebase Realtime Database to monitor electrical parameters (voltage, current, power) simultaneously across three phases. Implementation testing was conducted for two hours with two-minute intervals, demonstrating system reliability with 100% data transmission success rate and latency under 2 seconds. Results show power fluctuations ranging from 9177W to 26285W, with peak consumption of 26285W occurring at 16:00-16:28, correlating with campus operational patterns. Compared to previous research, this system offers advantages in simultaneous three-phase monitoring, scalable cloud integration, and the excellent processing capabilities of ESP32. Although the system relies on a Wi-Fi connection and is not equipped with predictive features, opportunities for further development include the integration of machine learning, notification systems, integration of building management systems, and expansion to multiple locations for sustainable smart campus energy management.
Pengaruh Variasi Proses Annealling Pada Performa Core Losses Trafo 1 Fasa E-I Nurhadi, Slamet; Anang Dasa Nofvowan; Satria Luthfi Hermawan; Binar Surya Gumilang
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.7291

Abstract

Transformers have key role in converting voltage level to suit several applications, ranging from industries to residential areas. As part of the local content product production initiated by the government, it is essential to identify the material quality to yield good performance. Therefore, developing a well-designed core material is substantial to prevent excessive transformers core losses during operation. The core losses performance due to the annealing process of the silicon steel core is presented in this research. The E-I core shape is chosen to imitate the existing distribution transformers. The design aims for the optimal core losses of the EI transformers. The design process involves the selection of the iron core and calculating the number of coil turns on the primary and secondary sides. Based on experimental results, under the same number of winding turns, no significant change in transformers impedance due to the annealing process duration. Testing with a nichrome wire load shows that Transformers 1, with a flux density of 1, achieves efficiency and voltage regulation close to 100%. The second test with the addition of a rectifier indicates a decrease in efficiency and regulation, with Transformers 3 and a flux density of 1,6 providing the best results. The research findings show that a smaller flux density in transformer results in better efficiency and regulation for AC output, while a larger flux density supports better efficiency and voltage regulation for DC output. These findings can serve as a guide in designing EI Transformers for optimal battery charging systems.
Sistem DC Microgrid Berbasis PLTS dan Baterai Mulyana, Akhbar Candra; Pramana, Putu Agus Aditya; Sriyono
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.7292

Abstract

Renewable energy in microgrid systems naturally uses direct current (DC) voltage sources such as solar, hydrogen, fuel cells and wind. On the other hand, electronic device technology is also increasingly developed with the emergence of devices based on DC voltage sources. However, integration between DC voltage sources and DC electronic equipment has not been widely developed in Indonesia. Based on these problems, research will be conducted on the implementation of the DC microgrid system. The methodology of this research is to create a minimum DC microgrid system consisting of photovoltaic (PV), solar charge controller (SCC), battery and dummy load which are integrated and tested using two test scenarios. During the test, the characteristics of voltage, power flow, and battery charge discharge process were observed against load variation. The results showed that under low-load conditions, mutual charging occurred between batteries connected in parallel. When the PV power exceeds the load power, the load is supplied by the PV but when the PV power is less than the load power, the load is supplied by the PV and battery. The contribution of power flow to the load is determined by the PV supply capacity, battery voltage, and impedance. The state of charge (SOC) of a battery cannot be used as a representation of the battery voltage when the circuit is closed circuit. These findings highlight the importance of impedance and PV capacity management in DC microgrid design and support further development of efficient and resilient DC based energy systems in Indonesia.
Evaluasi dan Mitigasi Distorsi Harmonisa Transformator 1250 kVA Beban Motor Pompa Air Anang Dasa Novfowan; Mochammad Mieftah; Dhimas Dhesah Kharisma
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.7330

Abstract

As a fundamental part of modern life, electricity must be both reliable and efficient—qualities that can be affected by issues like voltage unbalance and harmonic distortion. This study investigates power quality in a 1250 kVA transformer that supplies continuous power to water pump motors at PDAM Wendit, which operate 24 hours a day. Data were collected using the Power Logic PM5100, while a passive filter design was developed and tested through simulations in Matlab/Simulink.The results show a Voltage Unbalance Factor (VUF) of 0,32%, which falls within the acceptable range according to NEMA standards. However, the Total Harmonic Distortion of Voltage (THDV) was found to be between 8% and 9,2%, exceeding the 8% limit recommended by IEEE 519-2014. The average power factor measured was 0,9. To address the excessive harmonic distortion, a single-tuned passive filter was designed targeting the dominant third-order harmonics. Simulations revealed that the filter successfully lowered the THDV to below 6% and reduced current by 1,5% to 3,4%. These findings highlight the importance of harmonic mitigation not only in meeting regulatory standards but also in improving energy efficiency, reducing power losses, and ensuring longer operational life for critical equipment like water pump motors.
Sistem Otomasi Suhu dan Kelembaban Pada Greenhouse Berbasis Sensor DHT22 dan Mikrokontroler Irwan Heryanto/Eryk; Swasmitha Arum Kusuma; Mohammad Noor Hidayat
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.7521

Abstract

Automatic control of temperature and humidity in greenhouses remains a critical challenge in precision agriculture, particularly in areas with limited access to modern technologies. This study aimed to design and implement an automated environmental control system using the DHT22 sensor and an Arduino microcontroller. The system was programmed to activate actuators, namely a water pump and a buzzer, based on predefined temperature and humidity thresholds. The research employed a hardware-based experimental method that included system programming, piping layout for water distribution, and field testing to validate sensor accuracy and control logic performance. The experimental results showed that the DHT22 sensor achieved high accuracy, with a temperature error of 0.02% and humidity errors ranging from 0.00% to 0.16%. The control logic functioned as expected, activating actuators only when the setpoint conditions were met, and the water distribution system operated efficiently using a 210-watt pump. Compared to prior studies that primarily focused on monitoring or single-aspect automation, this research offered a more comprehensive approach by integrating control logic, mechanical design, and electrical efficiency. The findings supported and expanded on previous work, particularly those utilizing similar sensors, but added value through direct implementation and real-world testing. This study contributed a practical and replicable solution for small- to medium-scale greenhouse automation, offering a low-cost and energy-efficient alternative for climate regulation in controlled agricultural environments
Sistem Pemantauan dan Pengendalian Kinerja Beban Listrik Melalui Telegram Ruman, Oktavianus; Setiawan , Aries Boedi; Sari , Resi Dwi Jayanti Kartika Sari
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 3 (2025): ELPOSYS VOL. 12 NO.3 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i3.7355

Abstract

The advancement of Internet of Things (IoT) technology has enabled the development of smarter and more efficient electrical systems. In this research, a smart meter system was designed and built using the ESP8266 microcontroller, PZEM-004T sensor, and relay module, integrated with the Telegram application. The system can monitor electrical parameters such as current, voltage, power, and energy consumption (kWh) in real-time, as well as providing remote load control features. The PZEM-004T sensor is used to accurately measure electrical parameters, while the relay functions as an additional protection mechanism against overcurrent conditions, with a current threshold of 2 Amperes. The system is also designed to automatically send daily energy consumption reports and cost estimates via Telegram. Test results show that the system can read data with high accuracy (relative error < 5%) and can automatically or manually control the power load via Telegram. Real-time notifications, energy reporting, and cost estimation features make this system effective for practical and economical electricity monitoring and control.
Implementasi Battery Management System Pada PLTS Hibrida Skala Kecil Binar Surya Gumilang; Mohammad Noor Hidayat; Rohmanita Duanaputri; Salman Alfarisi
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 3 (2025): ELPOSYS VOL. 12 NO.3 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i3.7652

Abstract

This study investigated the implementation of a Battery Management System (BMS) as a protective and performance-enhancing component in a small-scale hybrid solar power plant storage system rated at 10 × 100 Wp. Battery degradation, voltage imbalance, and excessive discharge currents are persistent challenges in off-grid and hybrid photovoltaic systems, particularly in rural electrification applications. The purpose of this research was to evaluate the effectiveness of an active cell balancing–based BMS in improving battery voltage stability, regulating discharge current, and extending battery life cycles.The research employed an experimental method by comparing system performance before and after BMS installation under identical charging and discharging conditions. Experimental results showed that prior to BMS installation, charging voltages among four VRLA batteries were unbalanced, ranging from 13.70 V to 13.80 V, and discharge currents reached up to 50.3 A. After BMS implementation, charging voltages became uniform at approximately 13.44 V, while discharge currents were limited to a maximum of 29.9 A. Furthermore, the SOC threshold was regulated from 100% to 90%, and discharge duration increased from 1.5 hours to 2 hours. Based on battery datasheet analysis, the estimated battery life cycle increased from a maximum of 372 cycles to 572 cycles. These findings indicate that the integration of a BMS with active cell balancing significantly enhances operational stability, thermal safety, and battery longevity. The results imply that BMS adoption is essential for improving reliability and sustainability of small-scale hybrid solar energy systems.

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