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Muhammad Fahmi Hakim
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elposys@polinema.ac.id
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UPT-P2M Politeknik Negeri Malang Gedung Graha Polinema Jalan Soekarno - Hatta No. 9 Malang, 65141
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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 197 Documents
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Sistem Pemantauan Panel Listrik 3 Fasa Untuk Pengukuran Energi Listrik Berbasis ESP32 Sobri Rizaldi Subroto; Aditya Chandra Hermawan; Mahendra Widyartono; Fithrotul Irda Amaliah; Ayusta Lukita Wardani
Elposys: Jurnal Sistem Kelistrikan Vol. 13 No. 2 (2026): ELPOSYS VOL. 13 NO.2 (2026)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v13i2.9439

Abstract

Electricity consumption continues to increase as electronic equipment is used, resulting in rising monthly electricity bills. The background to this title stems from an electricity consumption survey. The survey team encountered difficulties monitoring electricity usage on the electrical panels in each building. The urgency of this research is to facilitate monitoring of electricity usage on three-phase electrical panels that can be easily installed and removed for use in various electrical panels The electrical energy data is accumulated from all three phases every second to determine the total electrical energy consumption across all three phases, the ESP32 microcontroller is also used as the brain for controlling the transmission and recording data in a Google spreadsheet for data storage.The results of the electrical energy measurement test, comparing the designed device with  3-phase kWh meter over six days of testing, revealed that the error value of the designed device was 0.26%, which is the maximum error value stipulated error limit of ±1%. This indicates that the designed measuring instrument has a high level of accuracy and meets international measuring instrument standards, with an average accuracy of 99.74%. The IEC 62053-21 standard is an international reference standard that regulates the accuracy and error limits for electrical energy meters (kWh meters). These results indicate that the designed electrical energy monitoring device is capable of performing well and accurately, approaching the values ​​of standard electrical energy meters (kWh meters).
Pengembangan Sistem Pompa Air Otomatis Berbasis PLTS Off-Grid untuk Irigasi Sawah Ar Rasyid Arumas; Mahendra Widyartono; Ayusta Lukita Wardani; Reza Rahmadian
Elposys: Jurnal Sistem Kelistrikan Vol. 13 No. 2 (2026): ELPOSYS VOL. 13 NO.2 (2026)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v13i2.9487

Abstract

Conventional irrigation systems in rural agricultural areas are generally operated manually and rely on fossil-fuel-based pumps, resulting in high operational costs and low efficiency, particularly during the dry season. The objective of this research is to develop an autonomous irrigation system based on an off-grid photovoltaic power system that operates automatically according to water availability conditions. The proposed system utilizes a 250 Wp photovoltaic panel, a 12 V 200 Ah VRLA battery, an Arduino Uno microcontroller, float switch sensors for water level detection, and a LoRa-based communication module for security and remote monitoring. Field testing was conducted under actual operating conditions during five hours of effective solar irradiation by measuring photovoltaic output parameters (voltage, current, power, and energy), pump operating performance, automatic control response, and LoRa communication reliability. The photovoltaic system produced a total daily energy of 622.34 Wh under the test conditions. The water pump operated for approximately 2.5 hours with an actual power consumption of ±500 W. The automatic control system successfully operated according to water availability in the river and irrigation demand in the rice field. In addition, the LoRa-based security system successfully transmitted warning signals over a distance of 300 m without data loss. These results indicate that the proposed system operates reliably for automatic rice field irrigation and remote security monitoring; however, increasing the photovoltaic capacity is recommended to better satisfy the system’s daily energy demand.
Trainer Kit Tegangan Langkah Berbasis Arus Gangguan sebagai Media Pembelajaran Sistem Pembumian Anton Firmansyah; Andri Suyadi; Indah Susanti; Muhammad Noer; Siti Khofifah; Nabila Shada
Elposys: Jurnal Sistem Kelistrikan Vol. 13 No. 2 (2026): ELPOSYS VOL. 13 NO.2 (2026)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v13i2.9532

Abstract

Human safety and electrical equipment reliability in power installations are strongly influenced by step voltage generated by fault currents flowing into the ground. The resulting ground potential distribution, which depends on fault current magnitude, grounding system characteristics, soil resistivity, and distance from the fault point, determines the level of electrical hazard to humans. This study aims to design, develop, and evaluate a step voltage trainer kit based on fault current injection as a practical learning media for understanding grounding system behavior and electrical safety principles. The research methodology involved field measurement of grounding electrode resistance, calculation of soil resistivity, design and fabrication of the trainer kit, and experimental testing under various fault current levels and measurement distances, both with and without a grounding system. Experimental results indicate that step voltage reaches its maximum value at locations closest to the fault point and decreases significantly with increasing distance, while the measured fault current remains relatively stable across different distances. The application of a low-resistance grounding system effectively reduces step voltage and flattens the ground potential gradient, thereby mitigating electrical hazard risks. The integration of field-based grounding resistance data into the soil simulator enables the trainer kit to realistically represent actual installation conditions. These findings demonstrate that the developed step voltage trainer kit provides a reliable, empirical, and safe educational platform for visualizing the relationship between fault current, soil resistivity, grounding systems, and step voltage hazards in electrical power installations.
Tongkat Pintar ESP32 dengan Deteksi Hambatan Multiarah dan Audio-Haptik Adaptif bagi Tunanetra Gilang Permana; Reza Rahmadian; Aditya Chandra Hermawan; Mahendra Wisyartono; Ayusta Lukita Wardani
Elposys: Jurnal Sistem Kelistrikan Vol. 13 No. 2 (2026): ELPOSYS VOL. 13 NO.2 (2026)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v13i2.9552

Abstract

Mobility is a major challenge faced by people with visual impairments in their daily activities. Conventional white canes commonly used still have limitations in detecting obstacles, especially those above ground level and uneven road surfaces. This study aims to develop an ESP32-based smart cane capable of detecting obstacles and road surface conditions while providing effective warnings to users. The system employs multiple ultrasonic sensors positioned at the front, left, right, and bottom of the cane. Sensor data are processed by the ESP32 microcontroller and conveyed through vibration and audio feedback. The research method includes hardware design, software development, and system testing covering sensor accuracy and response time evaluation. The test results indicate that the proposed system achieved obstacle detection with sensor error rates ranging from 0.2% to 0.6% and response times ranging from 0.7 s to 1.2 s, demonstrating reliable performance for mobility assistance. Therefore, the proposed smart cane has the potential to improve safety and independence for people with visual impairments during walking activities.
Strategi Kendali Daya Baterai-Superkapasitor Berbasis Variable Time Constant dengan Pendekatan Gradien Ariq Kusuma Wardana; Imron Ridzki; Arinalhaq Fatachul Aziiz; Ricto Yudi Wicaksono
Elposys: Jurnal Sistem Kelistrikan Vol. 13 No. 2 (2026): ELPOSYS VOL. 13 NO.2 (2026)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v13i2.9690

Abstract

Photovoltaic (PV) power generation is inherently intermittent, causing power fluctuations that can degrade DC-bus voltage stability and overall system performance. To address this issue, this study proposes an adaptive variable time constant (VTC) control strategy with a gradient-based approach for battery–supercapacitor power management in a stand-alone PV system. In the proposed method, the low-pass filter (LPF) frequency is adjusted adaptively according to the gradient of the total compensation current. A higher gradient increases the LPF frequency to improve transient response, while a lower gradient helps maintain stable operation and supports balanced power sharing between the battery and supercapacitor. The proposed strategy was evaluated in MATLAB/Simulink under two irradiation-change scenarios, namely undershoot (1000 to 750 W/m²) and overshoot (750 to 1000 W/m²), and compared with fixed time constant (FTC) methods. The results show that the proposed VTC strategy yields the lowest average DC-bus voltage deviation of 9.50%, compared with 9.66% for FTC minimum and 9.68% for FTC maximum. In addition, it maintains a low average supercapacitor state-of-charge deviation of 0.0150%, equal to FTC maximum and significantly lower than FTC minimum (0.1628%). These findings indicate that the proposed adaptive VTC strategy improves voltage regulation while maintaining effective battery-supercapacitor power sharing under dynamic PV operating conditions.
Evaluasi Tekno-Ekonomi dan Lingkungan Co-Firing Biomassa pada PLTU CFB di Nusa Tenggara Timur Andi Wulan; Sidqi Muhammad Ahsin
Elposys: Jurnal Sistem Kelistrikan Vol. 13 No. 2 (2026): ELPOSYS VOL. 13 NO.2 (2026)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v13i2.9810

Abstract

This study evaluates the technical, economic, and environmental performance of biomass co-firing implementation at the Bolok Coal-Fired Power Plant (CFB type) in East Nusa Tenggara. The study aims to assess the impact of biomass substitution on plant performance and to analyze uncertainty associated with key operational parameters. A deterministic analysis was conducted using what-if scenarios, while uncertainty was evaluated through Monte Carlo simulation with 10,000 iterations. Technical performance was assessed using Specific Coal Consumption (SCC), economic performance was evaluated based on fuel cost, and environmental performance was measured through CO₂ emission reduction. The results indicate that SCC ranges from 0.85 to 1.08 kg/kWh with an average value of 0.96 kg/kWh. Fuel cost ranges from IDR 991,314.93 to IDR 1,352,002.53 per MWh, while CO₂ emission reduction ranges from 2,711.85 to 5,796.49 tonCO₂. The findings show that increasing the co-firing ratio contributes to significant emission reduction while maintaining fuel cost within an acceptable range, although specific fuel consumption tends to increase due to the lower calorific value of biomass. Monte Carlo simulation reveals that economic variables, particularly biomass price, have the greatest influence on uncertainty compared with technical and environmental variables. The main contribution of this study lies in the integration of technical, economic, environmental, and probabilistic analyses using actual operational data from a CFB power plant, providing a more comprehensive basis for evaluating biomass co-firing implementation under uncertain operating conditions.
Penyeimbangan Beban Trafo Distribusi Berbasis Data Hasil Pendeteksian Phasa Pelanggan Tegangan Rendah Anang Dasa Novfowan; Dhimas Dhesah Kharisma; Slamet Nurhadi
Elposys: Jurnal Sistem Kelistrikan Vol. 13 No. 2 (2026): ELPOSYS VOL. 13 NO.2 (2026)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v13i2.9858

Abstract

Load imbalance caused by varied single-phase customer demand can increase neutral current and affect the operational performance of low-voltage distribution systems. This study evaluates a Power Line Carrier (PLC)-based customer-phase identification workflow to support load balancing at the N1223 distribution substation. A field case-study design was used, with phase-current measurements taken at the low-voltage main distribution panel during peak loading and customer phase data verified using a PLC master-slave system. The initial condition (R = 265 A, S = 133 A, and T = 116 A) produced an unbalance index of 36.45% and a neutral current of 141 A. After phase reassignment in Lines B and C, the highest recorded post-balancing unbalance was 5.1%; at 20:00, R = 166 A, S = 185 A, and T = 172 A produced an unbalance index of 4.1%. The post-balancing neutral current was 16.82 A. These findings show that verified customer-phase data provide a traceable basis for selecting rephasing targets. Quantitative neutral-conductor loss estimates are not reported as a main finding because the conductor resistance, length, and cross-sectional area required for independent verification were unavailable.

Page 20 of 20 | Total Record : 197

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