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All Journal Journal of Environment and Sustainability Indonesian Journal of Electrical Engineering and Computer Science REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Jurnal Pengabdian Polinema Kepada Masyarakat Jurnal Pengabdian kepada Masyarakat Jurnal Pengabdian Mandiri Jurnal ELTEK ELPOSYS: Jurnal Sistem Kelistrikan Jurnal Teknik Ilmu dan Aplikasi Research Horizon Jurnal ELTEK
Rohmanita Duanaputri
Politeknik Negeri Malang, Malang, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Public Health Social Sciences Other

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A method for estimating the remaining life of power transformers considering loading, hotspot temperature, and oil assessment Rohmanita Duanaputri; Rizky Anjani; Rahman Azis Prasojo; Muhammad Fahmi Hakim; Dhimas Dhesah Kharisma
Sustinere: Journal of Environment and Sustainability Vol. 8 No. 3 (2024): pp. 288-417 (December 2024)
Publisher : Center for Science and Technology, IAIN Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22515/sustinere.jes.v8i3.449

Abstract

Power transformers face significant aging issues, which threatens their reliability and service life. This research aims to develop an accurate method for predicting the remaining lifespan of transformers. Current studies highlight the inadequacy of existing approaches in determining transformer lifespan, which is affecred by the degradation of paper insulation through furan compounds and hotspot temperatures. This method adheres to the CIGRE D1 738 (2018) standard, which converts furan concentration into Degree of Polymerization (DPest) as an indicator of paper insulation condition. The methodology involves analyzing oil test data and operational temperature to estimate the remaining life of the transformer. This research not only aims to improve the accuracy of paper insulation assessments but also integrates sustainability principles. The goal is to optimize the use of existing transformers, reduce premature replacements, and conserve material and energy resources. By minimizing unexpected failures, this research contributes to reducing industrial waste and environmental impact. Furthermore, this approach aligns with practices that support economic and social sustainability. Extending the lifespan of critical devices can lower maintenance costs while ensuring a reliable and sustainable energy supply. The proposed method provides a comprehensive framework for predicting transformers longevity.
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.
Participatory Training and Battery-Powered Milking Nurhadi, Slamet; Ridzki, Imron; Wiwaha, Sigit Setya; Duanaputri, Rohmanita; Effendrik, Popong; Gumilang, Binar Surya
Research Horizon Vol. 5 No. 3 (2025): Research Horizon - June 2025
Publisher : LifeSciFi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54518/rh.5.3.2025.664

Abstract

Smallholder goat farmers in Jabung Village, Malang Regency, face significant challenges related to manual milking, including prolonged labor time and limited access to appropriate technologies. This study aimed to evaluate the effectiveness of a portable, battery-powered milking device in enhancing labor efficiency, technical knowledge, and economic outcomes for these farmers. Using a Participatory Action Research (PAR) approach, the research involved 50 farmers through a baseline survey, co-design process, a six-hour training session, and follow-up evaluation. The results showed that the device reduced the average milking time for five goats from 64 ± 4 minutes to 55 ± 3 minutes, indicating a 14% improvement. Farmers’ technical knowledge also increased significantly, from 42% to 85% after training. User satisfaction was high, averaging 4.2 out of 5, with women reporting greater ergonomic benefits. Economically, the device demonstrated an eight-month payback period based on a milk price of 12,000 Indonesian Rupiah per liter. Furthermore, 80% of farmers were able to operate the device independently after training. These findings suggest that the device holds strong potential to improve smallholder productivity and resilience, contributing to Sustainable Development Goals (SDGs) 2 and 7. However, limitations include the small sample size and the absence of data on milk quality, indicating the need for broader, long-term research.
PENINGKATAN KINERJA PETERNAK KAMBING SKALA KECIL DESA KEMANTREN KECAMATAN JABUNG KABUPATEN MALANG DENGAN MENYEDIAKAN PERALATAN PERAH TENAGA LISTRIK PORTABLE Rohmanita Duanaputri; Afidah Zuroida; Binar Surya Gumilang; Masramdhani Saputra; Rhezal Agung Ananto; Awan Setiawan
JURNAL PENGABDIAN MANDIRI Vol. 4 No. 9 (2025): September 2025
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Kecamatan Jabung memiliki penduduk dengan beragam profesi, di mana 19% bekerja sebagai petani dan peternak, berdasarkan data survei penduduk Kabupaten Malang tahun 2021. Komoditas utama peternakan di Jabung adalah sapi perah, yang mampu menghasilkan 10.000 liter susu per hari. Selain sapi perah, beberapa warga juga memelihara kambing perah. Susu kambing dikumpulkan setiap pagi dan sore, lalu disalurkan ke pabrik pengolahan melalui stasiun pengumpul yang dikelola oleh CV Amanah, yang juga bertindak sebagai distributor. Namun, warga Jabung masih menggunakan cara manual dalam memerah susu kambing, yang kadang menyebabkan kualitas susu yang dikirim ke stasiun pengumpul tidak memenuhi standar, sehingga nilai ekonominya menurun. Untuk mengatasi masalah ini, dilakukan pemberdayaan masyarakat melalui penyediaan peralatan perah bertenaga listrik portabel bagi peternak kecil di Desa Kemantren, Kecamatan Jabung. Alat ini menggunakan baterai dengan kapasitas 7 liter/jam, yang diharapkan dapat mempermudah pekerjaan memerah susu pada peternak kecil dengan aset 1-3 ekor kambing atau sapi. Pemberdayaan ini bertujuan untuk meningkatkan kesejahteraan masyarakat dan menjaga kualitas susu yang dihasilkan.
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.
Co-Authors Adil Prasetyo Afidah Zuroida Agung Fiqh Paramonta Islam Ahmad Hermawan Ahmad Hermawan Ahmad Jamaruddin Akbar , Divac Nabiel Amaral, Hanifiyah Darna Fidya Ananto, Rhezal Agung Andrianto, Arif Anton Setya Aji Herdiansyah Apriliasari, Jamik Asfari Hariz Santoso Awan Setiawan Awan Setiawan Ayusta Lukita Wardani Bayu Prasetyo Binar Surya Gumilang Budi Eko Prasetyo Devi Soviati Mahmudah Dhimas Dhesah Kharisma Dini, Rosina Ahda Effendrik, Popong Egar Rahmat Maulana Eko Yulianto Elyasa, Rizki Dias Epiwardi Fahad, Waris Malik Fahmi Hakim, Muhammad Fery Nova Dwi Prasetyo Galuh Prawestri Citra Handani Galuh Prawestri Citra Handani Gumilang, Binar Surya Hakim, Muhammad Fahmi Handani, Galuh Prawestri Citra Harrij Mukti K. Hastari , Galih Pratiti Citra Insani, Putra Aulia Irwan Heryanto/Eryk Jamik Apriliasari Kresna Bayu Priambodho Kresna Bayu Priambodo Liska Safarina Lukman Hakim M. Syarif Hidayatullah M. Syarif Hidayatullah Mahmudah, Devi Soviati Masramdhani Saputra Mochammad Mieftah Mohammad Iqbal Yulianto Mohammad Noor Hidayat Muhammad Fahmi Hakim Muhammad Fahmi Hakim Muhammad Firas Sajidan Mukti, Harrij Nadhiroh, Nuha Nadila, Dilavinsa Indar Putri Nurhadi - Nurhadi, Slamet Prasojo , Rahman Azis Prasojo, Rahman Azis Priya Surya Harijanto Rahma Nur Amalia Rahma Nur Amalia Rahman Azis Prasojo Rahman Azis Prasojo Reyhan Aulia Rachman Ridzki, Imron Rizky Anjani Rosina Ahda Dini Ruwah Joto Ruwah Joto Salman Alfarisi Sigi Syah W Sigi Syah Wibowo Sigit Setya Wiwaha Sigit Setya Wiwaha Sri Wahyuni Dali Sukamdi Sulistyowati Sulistyowati Sungkowo, Heri Tresna Umar Syamsuri Tresna Umar Syamsuri Wijaya Kusuma Wijaya, Bustani Hadi Wiwaha, Sigit Setya Yulianto, Mohammad Iqbal Zakki Fuadi Emzain Zulvina Arifah Zuroida, Afidah