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Muhammad Fahmi Hakim
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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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Rancang Bangun Pengusir Hama Burung dan Belalang Pada Padi Menggunakan Gelombang Ultrasonik Berbasis Lora Wardani, Ayusta Lukita; Amirul Haq Al Rasyid
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.6347

Abstract

Indonesia, as an agricultural country, faces the challenge of pests in the agricultural sector, one of which is the sparrow that often attacks rice plants, causing a decrease in rice yields. The use of traditional methods such as canned sound is considered less effective, so ultrasonic technology is chosen as a safer alternative to pesticides that can cause side effects to the environment. This research aims to design and test a sparrow and locust pest repellent tool on rice plants using ultrasonic waves based on LoRa technology, with the hope of offering a more efficient and environmentally friendly solution. Tests were conducted to determine the effectiveness of ultrasonic frequencies against sparrow and locust pests, as well as the maximum distance the tool can work. The device was tested with various wave frequencies (30 kHz, 35 kHz, 40 kHz) at different distances, and the LoRa communication range was measured until the signal was lost. The test results show that the optimal frequency to repel sparrows and locusts is 40 kHz with an effective range of up to 3 meters, and the LoRa module is able to transmit signals up to a distance of 63 meters. This research offers an alternative solution for farmers to repel pests effectively without harmful chemicals, as well as providing ease of tool control in areas without internet connection.
Analisis Potensi Daya Listrik PLTS Atap di Gedung K4 Universitas Negeri Surabaya Wardani, Ayusta Lukita; Aribowo, Widi; Widiyartono, Mahendra; Rahmadian, Reza; Hermawan , Aditya Chandra; Laksmi B, Nur Vidia
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.6348

Abstract

In order to utilize the potential of solar energy and support the government in its energy transition efforts and achieve Net Zero Emissions, it is necessary to utilize solar power plants more massively. One thing that can be done is the installation of solar panels on the roof of a building called Rooftop PLTS. This rooftop PLTS is designed on the roof of the K4 Unesa building with an ongrid system because lecture activities only exist from morning to evening. Research conducted to analyze the potential of electrical energy on the roof of the K4 building using OpenSolar software. From the simulation results, the roof of the K4 building can be designed to install 70 solar panels with the LR4-72HPH-450M type and 5 Goodwe GW5K-DT type inverters which can produce 35,478 kWh per year with a PLTS capacity of 31,500 Wp. From the shadow simulation results, it is found that the selected location is optimal because there are no shadows of other buildings, trees or shadows from the solar panels themselves. Then from the POA analysis, it is found that between April to September has a relatively large amount of generation while in February the lowest energy is generated.
Rancang Bangun Grounding Box Soil Treatment Sebagai Media Pengukuran Resistansi Pentanahan untuk Proteksi Pembangkit Hybrid PV – Angin Politeknik Negeri Malang Priya Surya Harijanto; Gumilang , Binar Surya; Prasetyo , Budi Eko; Syamsuri , Tresna Umar
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.6419

Abstract

This study addresses the issue of high resistance in the grounding system of the Savonius-Solar Hybrid Power Plant at Politeknik Negeri Malang, caused by rocky and sandy soil conditions, with an initial resistance value of 35 Ω. The purpose of this research was to test the effectiveness of soil treatment using bentonite, charcoal, and salt in reducing resistance to meet the PUIL 2011 standard (<5 Ω). This study employed an experimental method with a quantitative approach, measuring resistance values before and after soil treatment application using a three-point earth tester.The results showed that soil treatment successfully reduced the soil resistance from 35 Ω to 2.85 Ω, meeting the maximum standard. This finding indicates that soil treatment is effective in improving the safety and reliability of grounding systems, making it beneficial for application in similar electrical systems located in areas with challenging soil characteristics.
Perilaku Dinamik Motor Induksi Pada Dual Frequency Supply Hariz Santoso, Asfari; Imron Ridzki; Lukman Hakim; Popong Effendrik; Priya Surya Harijanto; Adam Amrullah Wijaya
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6384

Abstract

The application of induction motors is currently very broad, one of which is in the fertilizer industry as a motor for vibrating screens with an auto clean mechanism. In this application, the induction motor is operated with two frequency values of 50 Hz during screening and 60 Hz during the auto clean process. The difference in frequency affects the dynamic characteristics of the induction motor. Especially when operated above the rated frequency, it will result in an increase in motor temperature so that regular monitoring of the motor temperature is needed. This study produces the dynamic characteristics of the motor when the supply frequency is 50 Hz with a transient condition duration of 0.5 seconds and a torque at steady state conditions of 25.89 Nm, while when the supply frequency is 60 Hz the transient condition duration is 0.5 seconds with a torque at steady state conditions of 31.03 Nm.
Pengukuran Unjuk Kerja MPPT Photovoltaic Stand-Alone Dalam Kondisi Perubahan Bertahap Iradiasi Matahari Rhezal Agung Ananto; Hanaldi, Wahyu; Harijanto , Priya Surya; Gumilang , Binar Surya; Santoso, Asfari Hariz
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6421

Abstract

Nowadays, renewable energy is an important energy. This study aims to analyze the performance of Maximum Power Point Tracking (MPPT) in Stand-Alone Photovoltaic (PV) systems in dealing with gradual changes in solar irradiation. The main focus of the study is the comparison between irradiaton to MPPT product. The research methodology involves the use of several types and sizes of PV to obtain representative data. Variations in solar irradiation intensity are used to simulate various real conditions. The initial objective is to assess the performance of specially designed MPPT and ensure that the system can function properly in optimizing PV power under changing irradiation conditions. The main objective is to analyze the performance of MPPT in Stand-Alone Photovoltaic systems as a whole, considering variations in PV types and sizes, as well as differences in solar irradiation levels. The results of this study are expected to provide in-depth insight into the effectiveness of MPPT under various operational conditions. Trials were conducted both in the laboratory and in the field to ensure the validity of the results. Thus, this study makes a significant contribution to the development of more reliable and efficient Stand-Alone Photovoltaic technology. The findings of this study are expected to be the basis for improving MPPT design and increasing the performance of Stand-Alone Photovoltaic systems in dealing with environmental variations and different operational conditions.
Implementasi Least Square Method Dalam Evaluasi Hasil Uprating Transformator Distribusi Rachmat Sutjipto; Sungkowo, Heri; Khristiana , Harrij Mukti; Kharisma , Dhimas Dhesah; Galang Putra Fauzy; Faradina Agiesta Anjali
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6450

Abstract

Overloading in distribution transformers negatively affects operational reliability, efficiency, and equipment lifespan. At Gardu Distribusi C0058 PT PLN (Persero) ULP Bululawang, the transformer with a 160 kVA capacity exceeded the safe loading threshold of 80%, reaching 92.2% in the first semester of 2022 and 90.1% in the second semester of 2022. This study aimed to analyze the effectiveness of the uprating method as a solution to mitigate overloading issues while ensuring long-term transformer performance. The research employed quantitative analysis with direct measurement, load factor evaluation, and load forecasting using the Least Square method. Before the uprating process, the transformer experienced a peak load of 147.55 kVA (91.7%), significantly surpassing the recommended safety limits. The uprating process increased the transformer capacity from 160 kVA to 200 kVA, reducing the loading percentage to 73.57%, which brought it back within the acceptable operational range. Furthermore, load forecasting using the Least Square method predicted that the transformer would remain within a safe load level, reaching 79.73% in 2027, ensuring stability for the next five years. These findings align with previous studies emphasizing the effectiveness of transformer uprating as an alternative to relocation or additional transformer installation. However, further research is required to evaluate the impact on protective devices and system reliability. This study highlights the viability of uprating as an efficient and cost-effective strategy for managing transformer overloading in distribution networks.
Optimalisasi Desain Sistem Photovoltaic untuk Elektrifikasi Sumur Minyak Terpencil Menggunakan PVsyst Muhtadi, M Zaky Zaim; Naufal, Muhammad Mirza; Pujianto, Pujianto; Hamdani, Chalidia Nurin
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6621

Abstract

Sustainable power management in remote oilfield operations faces significant challenges due to grid dependency. This study evaluates a photovoltaic microgeneration system implementation at PT XYZ's oilfield facility using PVsyst simulation software. The methodology incorporates site-specific parameters to optimize system configuration for grid integration. Results show that a 4-unit monocrystalline photovoltaic array, receiving annual Global Horizon irradiation of 2008.9 kWh/m² and Global effective irradiation of 1893.9 kWh/m², achieves 2446.3 kWh/year generation capacity with 1974.6 kWh/year available for consumption. This microgeneration system meets 53.3% of the facility's 3706.9 kWh annual demand, with a Performance Ratio of 0.619, demonstrating significant potential for remote oilfield applications. The system's performance indicates opportunities for enhancement through capacity expansion, smart grid integration, and implementation of advanced monitoring systems, offering a scalable model for similar remote facilities in the oil and gas sector.
Sistem Monitoring Manajemen Baterai Perahu Listrik di Sayung Menggunakan Metode What If Arif Fajar Nugroho; Supari; Pinandita, Satria
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6638

Abstract

The price of fuel oil contributes 45% of the total operational costs of fishermen, which must be borne while operating electric passenger boats. The search for alternative sources of electrical energy, especially solar powered electric boat, is carried out as an effort to overcome this problem. In this study, monitoring using the firebase application serves as the main means of data collection. To obtain real data on the voltage and electric current in the battery, researchers used the what if approach, where the program can read the input values ​​​​from the voltage and current sensors on the battery. By using the what if method, researchers want to obtain accurate battery charging and discharging test results and a level of truth approaching 100%. From the data analysis, the results showed that when charging the battery, the highest peak point occurred from 12.00 to 13.00 with a light intensity of 168080.40 Lux, a current of 10.57 amperes and a temperature of 32.20 0 C. While when discharging the battery, the lowest voltage value occurred at minute 45 of 71.28 volts, inversely proportional to the current of 41.26 amperes. This is due to the voltage drop in the battery to supply the 4000 Watt BLDC motor.
Evaluasi Kapasitas Genset Sebagai Sistem Back-Up Energi Listrik di Gedung Sekretariat Daerah Zuroida, Afidah; Galuh Prawestri Citra Handani; Hanifiyah Darna Fidya Amaral; Rohmanita Duanaputri; Bayu Prasetyo
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6837

Abstract

Generator sets (gensets) are important tools to be available in public places as a backup source of electrical power, if there is a power outage from the main electrical source. In this study, an evaluation analysis of the generator capacity was carried out in the West Kalimantan secretariat building on April 2023. This building has a total load of 677 kW supplied by PLN medium voltage 20 kV and lowered by a 630 kVA step-down transformer. Current observations were made during Off Peak Load Time at 13.00-15.00 and Peak Load Time at 17.00-19.00. From this experiment, it can be concluded that in April 2023 the highest peak load usage was 568.67 kW or 710.83 kVA. After the calculations have been done, the generator power capacity in the building must be 651.61 kW, while the generators used were two units with a power capacity of 1280 kW. Thus, the generator has met the electrical energy needs of the building. The efficiency of the generator when the genset works for 60 minutes in the building is still relatively low, which is 26.25%. The ACB safety rating used on the outgoing genset to the Low Voltage Main Distribution Panel (LVMDP) has a rating of 2000 A for one genset unit and 4000 A for two synchronous genset units, which is in accordance with the calculation of the safety capability value from PUIL 2011 reference.
Evaluasi Operasional Pemutus Tenaga Gas SF6 di Gardu Induk 150 kV Rachmat Sutjipto; Heri Sungkowo; Muhammad Khairan; Slamet Nurhadi; Muhammad Fahmi Hakim
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6847

Abstract

Circuit Breaker (CB) is a critical component in high-voltage substations that functions to switch and disconnect electrical currents under normal and fault conditions. Over time, operational aging and environmental factors may degrade the performance of CB, potentially impacting power system reliability. This study aimed to evaluate the feasibility of 150 kV CB at Probolinggo Substation, particularly in Transformer Bay 1 and Transformer Bay 3, through a comparative analysis of insulation resistance, contact resistance, contact simultaneity, and SF6 gas purity based on tests conducted in 2021 and 2023. The study employed experimental methods and standard-based evaluations, referring to VDE (Catalogue 228/4), IEC 60694, SKDIR-0520/2014, and CIGRE standards. The findings revealed that although insulation resistance values showed slight degradation in 2023, they remained above the minimum threshold, ensuring safe operation. Contact resistance increased marginally due to dust accumulation and aging but still met the IEC 60694 standard. Contact simultaneity remained well within SKDIR-0520/2014 limits, indicating proper switching operation. SF6 gas purity tests showed a minor increase in moisture content due to condensation, yet all parameters complied with CIGRE standards. These results align with previous studies that highlight CB degradation over time but confirm that regular maintenance can sustain its operational reliability. This research underscores the importance of periodic monitoring and predictive maintenance strategies. Future work should explore real-time IoT-based monitoring and numerical simulations to enhance failure prediction models and optimize maintenance strategies for high-voltage circuit breakers.

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