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All Journal Setrum : Sistem Kendali-Tenaga-elektronika-telekomunikasi-komputer ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Prosiding SI MaNIs (Seminar Nasional Integrasi Matematika dan Nilai-Nilai Islami) Limits: Journal of Mathematics and Its Applications Teorema: Teori dan Riset Matematika Kilat Jurnal Ilmiah Sutet Jurnal Teknik TEKNOKOM : Jurnal Teknologi dan Rekayasa Sistem Komputer TERANG : Jurnal Pengabdian Pada Masyarakat Menerangi Negeri Indonesian Journal of Electrical Engineering and Computer Science Ilomata International Journal of Social Science Milang Journal of Mathematics and Its Applications International Journal of Engineering Continuity Electrician : Jurnal Rekayasa dan Teknologi Elektro
Fikri, Miftahul
Institut Teknologi PLN
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Analisis Variabel Perubahan Suhu Terhadap Karakteristik Tegangan Tembus Dielektrik Udara Christiono; Miftahul Fikri; Iwa Garniwa MK; Kartika Tresya Mauriraya
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 22 No 1 (2023): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol22no1.459

Abstract

The problem in the tropics is the effect of temperature changes on the high voltage system, resulting in isolation around the electricity distribution in the 20 kV cubicle, which can trigger the insulation failure (breakdown voltages) on a feeder. To reduce the occurrence of power outages due to insulation failure with changing temperatures, direct testing is carried out by providing temperature variations ranging from 30oC to 90oC. To correctly understand the phenomenon, testing should be carried out. The test is carried out every 5 oC temperature increase. Based on the research results, a graph is obtained that explains the decrease in the breakdown value at 50oC, which causes the insulation breakdown voltage to be 27kV, and the decrease in the breakdown voltage at 90oC, which causes the insulation breakdown voltage to decrease to 22kV. Based on experiments, it can be concluded that the greater the temperature rise, The breakdown voltage appears more quickly. Thereafter, the data from the research results were tested using the linear regression analysis method, so that a MAPE obtained 3.89% and an RMSE obtained 1.33 were obtained with an average percentage obtained 0.37%.
Pembuktian Ukuran Kuantum dan Ukuran Possibility Sebagai Perumuman Ukuran yang Tidak Saling Memperumum miftahul Fikri
Limits: Journal of Mathematics and Its Applications Vol 20, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/limits.v20i2.9063

Abstract

Sejak Planck dan Zadeh masing-masing mengkaji teori kuantum dan teori possibility, kajian kedua teori ini terus dilakukan hingga sekarang. Dari sisi matematika, kedua teori ini yang berkaitan langsung dan menjadi dasar dalam berbagai kajian baik teoritis maupun aplikatif adalah ukuran kuantum dan ukuran possibility. Meskipun dalam banyak literatur ukuran kuantum dan ukuran possibility merupakan perumuman ukuran tetapi tidak dibuktikan berdasarkan definisi sehingga tidak nampak secara langsung substansi perumuman tersebut. Selain itu, dalam berbagai literatur juga tidak ditemukan pembahasan keterkaitan antara ukuran kuantum dan ukuran possibility. Oleh karena itu, pada penelitian ini dilakukan pembuktian berdasarkan definisi baik ukuran kuantum dan ukuran possibility merupakan perumuman ukuran maupun ukuran kuantum dan  ukuran possibility tidak saling memperumum sehingga ukuran merupakan irisan keduanya.
Pelabelan Harmonis pada Graf Tangga Segi Tiga Paku Kurniawan Atmadja; Miftahul Fikri
Limits: Journal of Mathematics and Its Applications Vol 20, No 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/limits.v20i2.9078

Abstract

Graf  dapat ditulis , yaitu himpunan tak kosong simpul (vertex) dan himpunan sisi (edge)  Pada graf  diketahui jumlah simpul dan jumlah sisi yang masing - masing dinotasikan dengan  dan   Graf  yang diberi label harmonis selalu mensyaratkan jumlah simpul tidak melebihi jumlah sisi. Pelabelan harmonis adalah fungsi injektif  dari himpunan simpul ke himpunan bilangan bulat modulo  yang membangkitkan fungsi bijektif dari himpunan sisi ke himpunan bilangan bulat modulo  dengan  yang menghasilkan label sisi yang berbeda. Kajian penelitian ini bertujuan untuk menambah koleksi graf harmonis dalam bidang Matematika kombinatorik, khususnya  berkaitan dengan penelitian graf tangga segitiga paku yang berkelanjutan. Graf tangga segitiga paku diperoleh dari hasil graf tangga segitiga   yang mengalami tambahan satu simpul dan dua sisi. Kemudian  dikonstruksi menyusun dan berbaris, sehingga mendapatkan hasil sebuah graf baru yang berbentuk seperti paku yang bersusun, terhubung dan berbaris. Lalu diberi label pada simpul dan sisi. Telah diketahui bahwa graf tangga segitiga  adalah graf harmonis. Pada paper ini ditunjukan bahwa graf tangga segitiga paku juga merupakan graf harmonis.
The Influence of Olive Oil Additive on Sunflower Seed Oil to Improve The Breakdown Voltage of Insulation Oil CHRISTIONO, CHRISTIONO; FIKRI, MIFTAHUL; MULYANA, IWA GARNIWA; ABDUH, SYAMSIR; MAURIRAYA, KARTIKA TRESYA; FAHRI, MUHAMMAD
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 12, No 3: Published July 2024
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v12i3.701

Abstract

ABSTRAKTegangan tembus isolasi minyak yang baru adalah sebesar >=30kV/2,5mm. Sesuaidengan standar IEC 601-56:2018. Minyak biji bunga matahari dipilih sebagaialternatif karena harganya terjangkau dan mudah diperoleh, akan tetapi minyakbiji bunga matahari murni belum memenuhi standar IEC 61099:2010, dalammemenuhi standart tersebut dibutuhkan zat adiftif untuk meningkatkan nilaitegangan tembus isolasinya. Tujuan dari penelitian ini adalah untuk meningkatkantegangan tembus isolasi minyak bunga matahari setelah ditambahkan aditiveminyak zaitun untuk meningkatkan kemampuan isolasi, mengikuti standar IEC61099:2010. Hasil penelitian menunjukkan bahwa minyak biji bunga mataharimempunyai nilai tegangan tembus sebesar 30,9 kV. Namun, setelah ditambahkanaditif minyak zaitun dengan perbandingan 60:40, nilai tegangan tembus meningkatmenjadi 50,3 kV. Sehingga hasil pengujian minyak biji bunga matahari yangditambahkan minyak zaitun memenuhi standar tersebut.Kata kunci: Minyak Isolasi, Minyak Bunga matahari, aditif, Tegangan TembusABSTRACTThe new oil insulation breakdown voltage is >=30kV/2.5mm. Compliant with IEC601-56:2018 standards. Sunflower seed oil was chosen as an alternative becauseit is affordable and easy to obtain, however, pure sunflower seed oil does not meetthe IEC 61099:2010 standard, to meet these standards additives are needed toincrease the value of the insulation breakdown voltage. This research aims toincrease the insulation breakdown voltage of sunflower oil after adding olive oiladditives to increase its insulating ability, following the IEC 61099:2010 standard.The research results show that sunflower seed oil has a breakdown voltage valueof 30.9 kV. However, after adding olive oil additives in a ratio of 60:40, thebreakdown voltage value increased to 50.3 kV. So that the test results forsunflower seed oil added with olive oil meet the standards outlined.Keywords: Insulation Oil, Sunflower Seed Oil, additive, Breakdown Voltage
Lifetime estimation of DC XLPE cable insulation using BPNN-IPM improved with various schemes and optimization methods Fikri, Miftahul; Abdul-Malek, Zulkurnain; Mohd Esa, Mona Riza; Supriyanto, Eko; Mulyana Kartadinata, Iwa Garniwa; Abduh, Syamsir; Christiono, Christiono
Indonesian Journal of Electrical Engineering and Computer Science Vol 36, No 1: October 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v36.i1.pp86-98

Abstract

The world’s need for green energy is something that cannot be postponed any longer, where the transmission-distribution process requires power distribution in DC voltage. However, currently, the majority use AC voltage, so limited experience and lack of data regarding electrical cable aging under high voltage (HVDC) and their reliability are problems that must be resolved. Crosslinked polyethylene (XLPE) constitutes many insulation cables used today, so estimating the lifetime of DC XLPE cable insulation is urgent research, even though various model-optimization improvements are needed to obtain accurate results. This research begins with pre-processing for the input and output data. These results were then analyzed using two improved model schemes to accommodate the addition of variable space charge and thickness: backpropagation neural network (BPNN) and hybrid BPNN with inverse power model (BPNN-IPM). The learning process uses gradient descent (GD), genetic algorithm (GA), and Levenberg-Marquardt (LM) optimization methods. Finally, the proposed method was verified using experimental data from previous research. The results show that the hybrid BPNN-IPM with LM optimization method is the most accurate: training root mean square error (RMSE) achieved 0 days, and testing RMSE achieved 0.83 days. These results show that the method BPNN-IPM-LM used is most accurate in estimating the lifetime of DC XLPE insulation.
Optimasi Daya Keluaran PLTS Berdasarkan Sudut Kemiringan Di Institut Teknologi PLN Jakarta Miftahul Fikri
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 18 No. 1 (2024)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v18n1.2534

Abstract

Energi terbarukan adalah energi yang mempunyai sifat terbarukan dan juga berkesinambungan yang dimana memiliki pemanfaatan alternatif terhadap energi yang perlu terus dikembangkan. Pembangkit Listrik Tenaga Surya (PLTS) menggunakan energi matahari sebagai sumber energi yang mngkonversi energi matahari menjadi energi listrik. Untuk mendapatkan nilai maksimal intensitas matahari yang diterima oleh panel surya, maka dibutuhkan sudut kemiringan paling optimal untuk menerima daya matahari yang paling tinggi. Penelitian ini dilakukan untuk mengetahui peningkatan daya yang dihasilkan terhadap perubahan sudut kemiringan dengan menggunakan metode kuantitatif korelasi dan menggunakan regretion quadratic method, yang dimana memperoleh nilai R² = 0,9273 dan mendapatkan hasil perbandingan yang didapatkan antara eksperiment dengan model regresi kuadrataik diperoleh nilai (Root Mean Square Eror) RMSE 0,160 yang menunjukkan model sangat baik. Kemudian diperoleh sudut yang mengoptimalkan luaran daya PLTS sebesar 33,7° dengan daya keluaran sebesar 8,87 W.
Improvement the cogging torque reduction methods by combining the magnet slotted and gradually inclined surface end in permanent magnet generator Abduh, Syamsir; Fikri, Miftahul; Nur, Tajuddin
Indonesian Journal of Electrical Engineering and Computer Science Vol 38, No 1: April 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v38.i1.pp32-38

Abstract

Cogging torque (CT) in permanent magnet synchronous (PMS) machine, generator or electric motor should be reduced to increase the preperformance in application. Many CT reduction techniques has been proposed in the last few years. This research dealt with the study of techniques for reduction of the CT in PMSG. The PMS generator investigated in this paper is the integral slot number type with 18 slots and 6 poles. The CT has been analyzed to be reduced by employ the slot opening width variation, magnet edges slotting, and gradually inclined surface end. This paper also has analyzed the effect of combination of slot opening width and slotting permanent magnets. The finite element method magnetics (FEMM) is used in this work to perform electromagnetic simulations of the PMSG. Using the FEMM, the CT reduction of permanent magnet synchronous generators studied is analyzed and the CT peak value is compared. It is found that by combining of reduced of slot opening and slotting the permanent magnets can reduce the CT of PMS generator significantly abound 98.55% compared with the base line model.
Co-Authors Abdul-Malek, Zulkurnain Agus Yogianto Andi Amar Thahara Azzahra, Septianissa Berlian Setiawaty CHRISTIONO CHRISTIONO Christiono, Christiono Dani Maula Sattar Denny setiawan Dewi Purnamasari Dhami Johar Damiri Dhami Johar Damiri Dwi Anggaini Eko Supriyanto Hastuti Azis I Gusti Putu Purnaba Iwa Garniwa Iwa Garniwa Iwa Garniwa MK Kartika Tresya Mauriraya Kartika Tresya Mauriraya Kurniawan Atmadja M. Reza Hidayat Makkulau, Andi Mohd Esa, Mona Riza Muh. Rezha Safariansyah Muhammad Fahri, Muhammad Mulyana Kartadinata, Iwa Garniwa Mulyana, Iwa Garniwa Nur, Tajuddin Nurmiati Pasra Rizki Pratama Rizki Pratama Putera Rizki Pratama Putra Samsurizal Samsurizal Septiannissa Azzahra Sungsang Dody Purwanto Syahty Pratiwi Syamsir Abduh Titi Ratnasari Titi Ratnasari Titi Ratnasari