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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Jurnal Teknik Elektro Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Dielektrika : Jurnal Ilmiah Kajian Teori dan Aplikasi Teknik Elektro Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Electrician : Jurnal Rekayasa dan Teknologi Elektro Jurnal Teknik Ilmu dan Aplikasi
Osea Zebua
University of Lampung
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Other

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Journal : Dielektrika : Jurnal Ilmiah Kajian Teori dan Aplikasi Teknik Elektro

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MONITORING KETIDAKSEIMBANGAN BEBAN TRANSFORMATOR DISTRIBUSI MENGGUNAKAN INTERNET OF THINGS Zebua, Osea; Komalasari, Endah; Alam, Syaiful; Aldiansyah, Aldiansyah
DIELEKTRIKA Vol 8 No 2 (2021): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

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Abstract

Unbalanced load is one of the causes of unpredictable distribution transformer failure, so it is necessary to monitor the unbalanced load condition of the distribution transformer. Internet of things technology-based equipment supports remote monitoring needs. This paper presents the monitoring of unbalanced load in distribution transformer based on IoT technology. The ZMPT101B voltage sensor and SCT019 current sensor are used to measure the rms voltage and current in each phase, the Arduino microcontroller is used to process the measurement data and send it to the network server via an ethernet shield and a wifi router equipped with an internet modem. The results showed that the monitoring equipment based on IoT technology is able to work to monitor load unbalanced online so that it could be monitored remotely via device connected to the internet network
Estimasi Parameter Kurva Biaya Bahan Bakar Pembangkit Termal di Sistem Kelistrikan Lampung Menggunakan Metode Equilibrium Optimizer Zebua, Osea; Firmansah, Danu; Ginarsa, I Made
DIELEKTRIKA Vol 9 No 1 (2022): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

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Abstract

Operasi ekonomis dari pembangkit termal membutuhkan kurva biaya bahan bakar dalam memenuhi permintaan beban. Temperatur dan penuaan generator dapat merubah kurva biaya bahan bakar, sehingga kurva biaya bahan bakar perlu diestimasi secara periodik. Makalah ini menyajikan estimasi parameter kurva biaya bahan bakar pembangkit termal di sistem kelistrikan Lampung menggunakan metode equilibrium optimizer (EO). Model kurva biaya bahan bakar yang digunakan adalah model kuadratik yang halus. Fungsi objektif yang ingin dicapai adalah minimisasi error (perbedaan) absolut total antara nilai aktual dengan nilai estimasi. Empat pembangkit termal di sektor pembangkitan Bandar Lampung dan Tarahan digunakan sebagai kasus studi. Hasil pengujian menunjukkan bahwa metode EO dapat mengestimasi parameter kurva biaya bahan bakar setiap pembangkit termal dengan baik dengan error absolut total yang minimum.
Monitoring Loss of Life Transformator Distribusi Menggunakan Internet of Things Zebua, Osea; Komalasari, Endah; Alam, Syaiful
DIELEKTRIKA Vol 9 No 1 (2022): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

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Abstract

Berbagai karakteristrik operasi dan gangguan yang terjadi pada dapat mengurangi umur pelayanan transformator distribusi. Pembebanan yang berlebihan, ketidakseimbangan beban dan gangguan hubungsingkat dapat mengakibatkan temperatur isolasi transformator naik dan mengakibatkan kerusakan isolasi transformator distribusi. Pemantauan dan monitoring transformator distribusi setiap waktu terkendala dengan banyaknya jumlah transformator distribusi, letak dan posisi pemasangan transformator distribusi dan jumlah tenaga pemantau yang terbatas. Tujuan dari penelitian ini adalah memonitoring prediksi loss of life (berkurangnya umur pelayanan) transformator distribusi dari jarak jauh dan kontinyu dengan merancang dan membuat suatu peralatan monitoring berbasis mikrokontroler dan teknologi internet of things (IoT). Hasil penelitian menunjukkan bahwa peralatan yang dibuat mampu menampilkan prediksi loss of life, besaran-besaran listrik dan temperatur transformator distribusi secara online yang dapat dilihat melalui peralatan yang terhubung ke jaringan internet.
Optimasi Sistem Panel Surya dan Baterai Untuk Meminimasi Biaya Pemakaian Energi Listrik Rumah Tangga Zebua, Osea; Ginarsa, I Made
DIELEKTRIKA Vol 11 No 1 (2024): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dielektrika.v11i1.354

Abstract

The use of photovoltaic-battery energy storage systems to meet the electrical energy needs of house while reducing the cost of using electricity from the grid is increasing. Optimization of this system can be performed by optimizing the energy consumption of solar panels and batteries. This paper presents the optimization of solar panels and battery systems to minimize the cost of using electricity from the grid. Circuit models and mathematical formulations of grid-connected solar panel and battery systems were created for optimization purposes. The optimization problem is solved by using mixed-integer linear programming and Pyomo software based on the Python programming language. Data on household electricity consumption and output power from two solar panels with a capacity of 100 Wp and 200 Wp respectively were obtained from the results of simultaneous measurements for one month. The test results show that the optimization of the solar panel and battery system can reduce the cost of electricity consumption at home with optimal energy consumption from solar panels and batteries.
Optimasi Tegangan-Daya Reaktif Pada Penyulang Rayap Menggunakan Alternating Direct Methods of Multipliers Zebua, Osea; Ginarsa, I Made
DIELEKTRIKA Vol 12 No 1 (2025): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dielektrika.v12i1.413

Abstract

The varying levels of voltage and reactive power can affect the amount of active power losses in the power distribution network. Therefore, optimization of voltage and reactive power values ​​needs to be done to reduce the amount of active power losses while improving the voltage profile at each bus. This paper presents the optimization of voltage and reactive power in the distribution network using the alternating direct method of multipliers (ADMM) algorithm. Optimization with the ADMM algorithm is carried out by separating the optimization of continuous variables and discrete/integer variables for each iteration and implemented by simulation using MATLAB software. The case study used is the Rayap feeder distribution network at the Metro substation, Lampung Province. The simulation results show that optimization of voltage and reactive power can reduce active power losses from 37.44 kW before optimization to 34.78 kW and improve the voltage profile at each bus from a minimum voltage value of 0.9713 per unit before optimization to 0.9734 per unit. The optimal tap position of the load tap changer obtained is 17 while the capacity position of the two capacitor banks is 400 kVAR each.
Co-Authors Agung Budi Muljono Aldiansyah, Aldiansyah banjar nahor, kevin elvredo Eliza , Dona Elnizar, Hendri Endah Komalasari Endah Komalasari, Endah Fernanda, Imam Ghozali Firmansah, Danu Gusmedi, Herry Hamdani, Fadil Hasan, Khairudin Herri Gusmedi Huda, Zulmiftah Huda, Zulmiftahul I Made Ari Nrartha I Made Ginarsa Khairudin Lukmanul Hakim Noer Soedjarwanto Nurmalik, Luki Prayogo, Christopher Theophilus Seniari, Ni Made Sultan Sultan Syaiful Alam Syidiq, Muhammad Al Rasyid T Rausyan Hilmy