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Handani, Galuh Prawestri Citra
Electrical Engineering Department, State Polytechnic Of Malang, 65141, Indonesia
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Evaluasi Metode Health Index Untuk Menentukan Prioritas Pemeliharaan Gardu Distribusi Galuh Prawestri Citra Handani; Rahman Azis Prasojo; Muhammad Fahmi Hakim; Muhammad Ridlo Zainal; Imron Ridzki; Bustani Hadi Wijaya
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.v11i3.6102

Abstract

Electricity is an essential energy source that plays a crucial role in human life. A key component of power distribution systems is the distribution substation. As distribution substations are in operation over time, their components experience aging, which can result in operational failures. This situation emphasizes the necessity for regular evaluations and diagnostics of distribution substations. Such assessments are crucial for identifying when equipment requires repair or replacement, ensuring that the system operates at maximum efficiency. By implementing a proactive maintenance strategy, utilities can mitigate risks, enhance reliability, and extend the lifespan of their infrastructure. The scoring matrix method is a technique for evaluating the condition of distribution substations. It combines results from field and laboratory tests to produce values that accurately reflect the substation's condition. The research focused on four distribution substations managed by PT PLN, classifying them into high, medium, and low categories based on their health index scores. The results show that, among the four distribution substations evaluated, substations A and C received health indices exceeding 80%, classifying them in the high category. It is therefore recommended that these substations continue operating normally while adhering to their scheduled periodic maintenance. In contrast, substation B received a health index between 50% and 80%, placing it in the medium category. While it can remain operational, it requires closer monitoring and maintenance at specific intervals to ensure reliability and prevent potential issues.
Karakteristik Breakdown Voltage Pada Dielektrik Minyak Mineral dan Minyak Ester Natural Hanifiyah Darna Fidya Amaral; Sungkowo , Heri; Handani, Galuh Prawestri Citra; Hermawan, Ahmad; Hermawan, Satria Luthfi; Ramadhana , Herlambang Kresna Adi; Agustin, Nabilla Dinda Tri
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.v11i3.6105

Abstract

The increasing demand for electrical energy, driven by population growth and industrial development, necessitates efficient and sustainable power distribution systems. Transformers, essential components of these systems, typically use mineral oil for insulation and cooling, despite its environmental drawbacks, such as high carbon emissions and non-biodegradability. In response, natural ester oils have emerged as eco-friendly alternatives. This study aimed to compare the dielectric breakdown voltage characteristics of mineral oil (Diala B) and natural ester oil (FR3) in transformer applications. The testing followed the IEC 60156 standard, focusing on transformers operating at 20 kV, with a minimum breakdown voltage threshold of 30 kV/2.5mm. Both treated and untreated samples were examined.The results indicated that FR3 ester oil exhibited superior dielectric properties, including higher breakdown voltage, flashpoint, and firepoint, as well as lower carbon emissions compared to mineral oil. These findings suggest that natural ester oil has significant potential as a sustainable replacement for mineral oil, particularly in applications where environmental and safety concerns are prioritized.The study recommends further long-term testing under operational conditions to confirm the performance and stability of ester oil in real-world transformer applications. These findings contribute to the growing body of research supporting the transition to more environmentally friendly transformer insulation materials, which could have broad implications for the power industry’s sustainability efforts
PELATIHAN DESAIN DAN INSTALASI AUTOMATIC FISH FEEDER PADA BUDIDAYA IKAN DI PERUMAHAN BUKIT CEMARA TIDAR Hanifiyah Darna Fidya Amaral; Rahma Nur Amalia; Galuh Prawestri Citra Handani; Afidah Zuroida; Dhimas Dhesah Kharisma; Anang Dasa Novfowan
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 4 No. 7: Desember 2024
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jabdi.v4i7.8888

Abstract

Pemberian pakan ikan merupakan kegiatan yang memerlukan konsistensi baik dalam waktu pemberian pakan dan jumlahnya. Budidaya ikan di Perum. Bukit Cemara Tidar masih menggunakan sistem manual, yang menyebabkan pembudidaya harus mengatur jadwal untuk pemberian pakan. Sistem pemberian pakan secara manual masih banyak memiliki kekurangan seperti jumlah pakan yang tidak sesuai takaran dan waktu pemberian pakan yang tidak teratur. Ketidakteraturan pemberian pakan ini mempengaruhi kualitas ikan dan biaya pembelian pakan. Untuk mengatasi permasalahan tersebut, maka tujuan kegiatan Pengabdian Pada Masyarakat ini dengan memberikan pelatihan desain dan instalasi alat pakan ikan secara otomatis (automatic fish feeder). Alat ini memudahkan pembudidaya dalam mengatur proses pemberian pakan sehingga dapat menjaga kualitas budidaya ikan dan penghematan biaya pakan. Metode kegiatan yang dilakukan adalah pelatihan dan pendampingan. Peserta diberikan ketrampilan dalam merancang automatic fish feeder, cara pengoperasian dan perawatan. Terdapat 2 alat yang terpasang pada kolam ikan. Berdasarkan pengujian kinerjanya, alat ini sudah bekerja sesuai fungsinya dimana dalam kurun waktu sehari setiap pukul 08:00 dan pukul 15:00 alat akan bekerja untuk memberi pakan pada ikan, waktu aktif servo sudah sesuai perencanaan yaitu 1 menit dengan range berat pakan yang dikerluarkan seberat 18 gram.
PEMASANGAN INSTALASI DRIP SYTEM UNTUK EFISIENSI LAHAN GUNA MENDUKUNG URBAN FARMING PADA PT TANDURIA AGROMEDIA INDONESIA Galuh Prawestri Citra Handani; Afidah Zuroida; Hanifiyah Darna Fidya Amaral; Lukman Hakim; Rohmanita Duanaputri; Ahmad Hermawan
J-ABDI: Jurnal Pengabdian kepada Masyarakat Vol. 4 No. 7: Desember 2024
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jabdi.v4i7.8891

Abstract

Konsep urban farming merupakan konsep penanaman yang dilakukan di perkotaan dengan memanfaatkan lahan tanam yang terbatas. Salah satu UMKM di Kota Malang yang bergerak di bidang urban farming yaitu PT Tanduria Agromedia Indonesia, berdiri pada tahun 2021. PT Tanduria Agromedia Indonesia menerapkan konsep ini dengan objek tanaman yaitu tomat dan mentimun pada lahan seluas ± 100 m2. Sistem penyiraman masih dilakukan secara manual dengan ketergantungan pada manusia yang menyebabkan tidak meratanya irigasi setiap area penanaman. Selain itu, ketergantungan terhadap ketersediaan air Perumda Tugu Tirta juga mempengaruhi waktu penyiraman jika terjadi gangguan distribusi air. Upaya yang dapat dilakukan untuk membantu mitra yaitu dengan menerapkan sistem irigasi “drip system” agar proses penyiraman setiap tanaman dapat merata. Teknik penyiraman ini dapat meningkatkan produktivitas tanam dan efisiensi lahan tanam melalui pemasangan instalasi kelistrikan pompa air yang dapat mengatur debit air tandon maupun proses irigasi.
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.
Pemodelan Kurva Pembebanan Transformator Distribusi Berdasarkan Variasi Penetrasi PLTS Atap Galuh Prawestri Citra Handani; Rahman Azis Prasojo; Nurfi Fuad Al Azah; Salman Alfarisi; Anang Dasa Novfowan; Afidah Zuroida; Rahma Nur Amalia; Rhezal Agung Ananto; Arinalhaq Fatachul Aziiz
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.v12i2.7326

Abstract

Transformers are considered important equipment in the power distribution system. Determining the state of the distribution network loading curve a network model to analyze the impact of the rooftop PV system penetration level. The assumption of penetration is 10% - 100% and based on the amount of transformer power according to the nameplate, which is 160 kVA. The transformer that used is GTT BB1215, which is one of the distribution transformers in the PT PLN (Persero) UP3 South Surabaya. The loading curve modeling uses DIgSILENT PowerFactory 2021 software with the Quasi-Dynamic Simulation feature. Based on the average loading curve of GTT BB1215 for 14 days, there is a fluctuation, starting at 00.00 a.m - 06.00 a.m the load will decrease, the load will increase again at 06.00 a.m – 07.00 p.m, and the peak load at 06.00 p.m - 07.00 p.m with a current of 140 A (96 kW) or 60% of the transformer capacity load. The lowest load occurs at 06.00 a.m with a current of 94 A (65 kW) or 40% of the transformer capacity load. At a penetration level of 10% - 40%, the transformer load decreases significantly. However, when the penetration level exceeds 40%, there is a reverse power flow from the rooftop PV system to the transformer. This condition make the current to continue flowing even though the load on the transformer has reached 0, because the current represents the power flow from the rooftop PV system to the network, not from the customer load.
Optimasi Injeksi Distributed Generation Menggunakan Algoritma Cat Swarm Optimization dan Krill Herd Algorithm Handani, Galuh Prawestri Citra; Suyono, Hadi; Nur Hasanah, Rini
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 13 No. 3 (2019)
Publisher : Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jeeccis.v13i3.624

Abstract

Abstrak – Pemanfaatan energi listrik sebagai upaya menciptakan green energy memerlukan suatu tindakan yang mendukung produksi energi yang efisien dengan menggunakan satu atau lebih energi alternatif yang dapat digabungkan menjadi sumber energi terdistribusi. Permasalahan pokok permintaan sumber energi yang semakin meningkat adalah keandalan sistem dan kualitas daya. Kualitas daya berkaitan dengan pengurangan nilai rugi-rugi daya listrik, berkurangnya nilai jatuh tegangan serta kontinuitas penyaluran energi listrik yang baik. Penambahan distributed generation (DG) pada sistem eksisting dinilai mampu mengurangi permasalahan kualitas daya dan meningkatkan keandalan sistem. Penelitian ini membahas optimasi penempatan DG dengan menggunakan metode Cat Swarm Optimization dan Krill Herd Algorithm. Optimasi dilakukan dengan menginjeksi DG pada sistem eksisting. Dari proses optimasi dengan CSO diperoleh penurunan rugi daya sebesar 0,2 % sedangkan dengan KHA diperoleh penurunan 29,5 %. Perbaikan profil tegangan dengan metode KHA dinilai lebih baik dari CSO dengan nilai diatas 0,99 p.u sedangkan CSO 0,96 p.u. Penelitian ini mengindikasikan bahwa metode KHA lebih baik daripada metode CSO.Kata Kunci — Distributed Generation, Cat Swarm Optimization, Krill Herd Algorithm.
Comparison of Breakdown Voltage and Aging of Kraft Paper in Transformers Immersed in Mineral Oil, Natural Ester, and Synthetic Ester Hanifiyah Darna Fidya Amaral; Galuh Prawestri Citra Handani; Rahman Azis Prasojo; Reyhan Fadhlur Rahman; Satria Lutfi Hermawan; Ruwah Joto; Afidah Zuroida; Ahmad Hermawan; Irwan Heryanto/Eryk
ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK Vol. 15 No. 2 (2025): ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK (July-November 2025 Edition)
Publisher : Universitas Panca Marga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51747/energy.v15i2.15215

Abstract

Transformers are critical components in electrical power systems that rely on insulation oil and paper to ensure reliable and long-lasting operation. This study aims to compare the performance of kraft insulation paper immersed in three types of transformer oil, namely mineral oil, natural ester, and synthetic ester, through the accelerated thermal aging method. Evaluation was carried out based on tensile strength and water content testing in accordance with the IEEE C57.100-2011 standard, as well as breakdown voltage testing in accordance with the IEC 60156-2018 standard. Tests were conducted with samples taken at intervals of 24, 240, 480, and 720 hours at 150°C. The results showed that insulation paper soaked in mineral oil experienced a 34% decrease in tensile strength, while natural ester and synthetic ester oils showed tensile strengths of 66% and 52%, respectively. In the water content test, natural ester showed the best performance with the lowest water content (5.19%), followed by mineral oil (7.47%) and synthetic ester (46.70%). In the breakdown voltage test, natural ester had the highest breakdown voltage of 66.26 kV, followed by mineral oil at 63.96 kV and synthetic ester at 41.14 kV. Estimated insulation life based on lifetime regression showed that natural ester has a lifetime of up to 37.9 years, synthetic ester 25.6 years, and mineral oil 20.5 years. In addition, in transformers operating at 130°C, natural ester insulation oil can increase loading up to 20% higher than mineral oil and has a 15-20°C higher operating temperature. This study recommends the use of kraft insulation paper impregnated with natural ester and synthetic ester oils as an alternative to mineral oil, because both are superior environmentally friendly alternatives compared to mineral oil. Both oils have better mechanical strength and insulation, lower water content, and can slow down transformer aging. Furthermore, these ester oils are non-flammable, biodegradable, and reduce the risk of failure due to excessive heat or discharge, thereby increasing the reliability and lifespan of the transformer. With these properties, ester oils support safer and more sustainable operations for the power system.
Co-Authors Afidah Zuroida Afidah Zuroida Afidah Zuroida Agustin, Nabilla Dinda Tri Ahmad Hermawan Ahmad Hermawan Akbar , Divac Nabiel Amaral, Hanifiyah Darna Fidya Anang Dasa Novfowan Ananto, Rhezal Agung Andrianto, Arif Arinalhaq Fatachul Aziiz Bayu Prasetyo Binar Surya Gumilang Binar Surya Gumilang Bustani Hadi Wijaya Chandra Wiharya Dhimas Dhesah Kharisma Divac Nabiel Akbar Divac Nabiel Akbar Elyasa, Rizki Dias Fahad, Waris Malik Gumilang, Binar Surya Hadi Suyono Hakim, Muhammad Fahmi Hanifiyah Darna Fidya Amaral Hastari , Galih Pratiti Citra Hermawan, Ahmad Hermawan, Satria Luthfi Imron Ridzki Irwan Heryanto/Eryk Kresna Bayu Priambodho Lukman Hakim Masramdhani Saputra Masramdhani Saputra Muhammad Aouky Syafaatuullah Muhammad Fahmi Hakim Muhammad Ridlo Zainal Nadila, Dilavinsa Indar Putri Nurfi Fuad Al Azah Popong Effendrik Prasojo, Rahman Azis Priya Surya Harijanto Rahma Nur Amalia Rahman Azis Prasojo Rahman Azis Prasojo Rahman Azis Prasojo Ramadhana , Herlambang Kresna Adi Reyhan Fadhlur Rahman Rini Nur Hasanah Rohmanita Duanaputri Ruwah Joto Saddani Djulihenanto Saddani Djulihenanto Salman Alfarisi Santoso, Asfari Hariz Satria Lutfi Hermawan Slamet Nurhadi Sukamdi Sungkowo , Heri Sungkowo, Heri Suyono, Hadi Wiwaha, Sigit Setya Zuroida, Afidah