Articles
<![CDATA[Penyelesaian Masalah Economic Dispatch Menggunakan Equilibrium Optimizer ]]>
<![CDATA[Zebua, Osea]]>;
<![CDATA[Ginarsa, I Made]]>;
<![CDATA[Ari Nrartha, I Made]]>
<![CDATA[ Jurnal Teknik Elektro Vol 13, No 1 (2021): Jurnal Teknik Elektro ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro, Fakultas Teknik, Universitas Negeri Semarang ]]>
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DOI: 10.15294/jte.v13i1.28698
<![CDATA[This paper presents a metaheuristic method, namely Equilibrium Optimizer (EO) to solve the economic dispatch (ED) problem. The main objective function to be achieved is to minimize the total fuel costs of all generating units to meet the total load demand and to satisfy various operating constraints. Three case studies are used to test the effectiveness of the EO method in solving ED problems, they are three generators case, six generators case, and fifteen generators case. The simulation of solving ED problems using the EO method is implemented using MATLAB software and is carried out 30 times for each case study. The results of EO method are compared with Particle Swarm Optimization (PSO), Grey Wolf Optimizer (GWO), and Whale Optimization Algorithm (WOA) methods. The simulation results show that the EO method can solve the ED problem more optimal than all other comparison methods for all the case studies by producing the minimum total fuel costs.]]>
<![CDATA[Pelatihan Pembuatan Alat Penghemat Energi Listrik Bagi Siswa-siswi SMK di Bandarlampung ]]>
<![CDATA[Zebua, Osea]]>
<![CDATA[ Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 6 No 1 (2022) ]]>
Publisher : <![CDATA[Lembaga Penelitian dan Pengabdian Universitas Lampung ]]>
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DOI: 10.23960/jss.v6i1.333
<![CDATA[Penggunaan alat penghemat energi listrik dengan kapasitor daya sebagai komponen utamanya dapat memberikan kompensasi daya reaktif sekaligus memperbaiki profil tegangan pada beban. Besar kapasitas kapasitor yang digunakan harus diperhatikan sehingga tidak menimbulkan kenaikan tegangan yang melebihi batas operasi yang diijinkan. Kegiatan pengabdian ini bertujuan untuk membantu siswa-siswi Sekolah Menengah Kejuruan (SMK) dalam memahami dan membuat alat penghemat energi listrik berbasis mikrokontroler. Metode yang digunakan berupa ceramah dan pelatihan. Hasil kegiatan diharapkan dapat meningkatkan pengetahuan dan ketrampilan dari siswa-siswi SMK dalam membuat sendiri alat penghemat energi listrik berbasis mikrokontroler]]>
<![CDATA[Kendali optimal pengoperasian PV terhubung ke grid menggunakan voltage souce converter (VSC) ]]>
<![CDATA[Huda, Zulmiftahul]]>;
<![CDATA[Gusmedi, Herry]]>;
<![CDATA[Zebua, Osea]]>
<![CDATA[ Prosiding Seminar Nasional Ilmu Teknik Dan Aplikasi Industri Fakultas Teknik Universitas Lampung Vol. 6 (2023): Prosiding Seminar Nasional Nasional Ilmu Teknik dan Aplikasi Industri (SINTA) 2023 ]]>
Publisher : <![CDATA[Fakultas Teknik Universitas Lampung ]]>
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<![CDATA[Pembangkit listrik terbarukan mulai meningkat pemanfaatannya pada sistem tenaga listrik, namun masing-masing jenis pembangkit mempunyai karakteritik yang berbeda. Pada penelitian ini Pembangkit Listrik Tenaga Surya (PLTS) akan dimodelkan dan dihubungkan ke jaringan melalui Voltage Souce Converter (VSC). Strategi kendali untuk mengatur daya aktif dan tegangan pada PLTS yang memungkinkan dapat mengirim daya tidak hanya ke beban namun dapat juga mengirimkan ke sistem jika sistem menghasilkan daya yang berlebih. Dengan strategi pengendalian yang efektif akan dapat meningkatkan efisiensi pemanfaatan PLTS, meningkatkan keandalan dan stabilitas sistem dalam melayani beban. Dari skema kendali pada penelitian ini perubahan tingkat irradian dari PLTS dapat tetap menjaga nilai tegangan output konstan dengan daya ouput yang dihasilkan optimal.]]>
<![CDATA[Analisis Commissioning Pembangkit Listrik Tenaga Surya Kapasitas 20.5 kWp On Grid PT. Quickprint Office ]]>
<![CDATA[Soedjarwanto, Noer]]>;
<![CDATA[T Rausyan Hilmy]]>;
<![CDATA[Komalasari, Endah]]>;
<![CDATA[Zebua, Osea]]>
<![CDATA[ Jurnal Teknik Ilmu dan Aplikasi Vol. 5 No. 2 (2024): Jurnal Teknik Ilmu dan Aplikasi ]]>
Publisher : <![CDATA[Politeknik Negeri Malang ]]>
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DOI: 10.33795/jtia.v5i2.4823
<![CDATA[Solar power plants (PLTS) are one of the renewable energy plants that continue to be developed in Indonesia to meet electrical energy needs. The Indonesian government issued the Electricity Supply Business Plan (RUPTL) as a national energy management framework designed to resolve energy needs challenges and problems by utilizing new renewable energy sources (EBT). In the construction of a Solar Power Plant (PLTS) at PT. Quick Print Office built PLTS with a capacity of 20.5 kWp which is used for the electrical energy needs used by PT. Quick Print Office with a total power of 10 kWp, generator system with an on grid system which means it is directly connected to the PLN network. In the feasibility study, the performance ratio (PR) obtained from manual calculations for inverter 1 was 71.9% and inverter 2 was 26.2%. Meanwhile, to improve the performance ratio of the PLTS system, maintenance of the PLTS system is required, starting from cleaning the panels or checking the cable installation on the PLTS. For the calculation results, the efficiency on inverter 1 was 94.6% and on inverter 2 the efficiency was 90.8% when measured at 11.18 – 14.53.]]>
<![CDATA[Transient response mitigation using type-2 fuzzy controller optimized by grey wolf optimizer in converter high voltage direct current ]]>
<![CDATA[Ginarsa, I Made]]>;
<![CDATA[Nrartha, I Made Ari]]>;
<![CDATA[Muljono, Agung Budi]]>;
<![CDATA[Zebua, Osea]]>
<![CDATA[ International Journal of Electrical and Computer Engineering (IJECE) Vol 14, No 2: April 2024 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijece.v14i2.pp1274-1286
<![CDATA[Long high voltage direct current (HVDC) transmission link is commonly used to transmit electrical energy via land or under-sea cable. The long HVDC avoids reactive power losses (RPL) and power stability problems (PSP). On the contrary, the RPL and PSP phenomena occur in long high voltage alternative current-link (HVAC) caused by the high reactive component in the HVAC-link. However, the HVDC produces a high and slow transient current response (TCR) on the high value of the up-ramp rate. Interval type-2 fuzzy (IT2F) control on converter-side HVDC is proposed to mitigate this TCR problem. The IT2F is optimized by grey wolf optimizer (GWO) to adjust input-output IT2F parameters optimally. The performance of IT2F-GWO is assessed by the minimum value of integral time squared error (ITSE), peak overshoot, and settling time of the TCR. The IT2FC-GWO performance is validated by the performance of IT2F control that is optimized by genetic algorithm (IT2F-GA) and proportional integral (PI) controller. Simulation results show that the IT2F-GWO performs better with small ITSE, low peak overshoot, and shorter settling times than competing controllers.]]>
<![CDATA[MONITORING KETIDAKSEIMBANGAN BEBAN TRANSFORMATOR DISTRIBUSI MENGGUNAKAN INTERNET OF THINGS ]]>
<![CDATA[Zebua, Osea]]>;
<![CDATA[Komalasari, Endah]]>;
<![CDATA[Alam, Syaiful]]>;
<![CDATA[Aldiansyah, Aldiansyah]]>
<![CDATA[ DIELEKTRIKA Vol 8 No 2 (2021): DIELEKTRIKA ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram ]]>
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<![CDATA[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]]>
<![CDATA[Estimasi Parameter Kurva Biaya Bahan Bakar Pembangkit Termal di Sistem Kelistrikan Lampung Menggunakan Metode Equilibrium Optimizer ]]>
<![CDATA[Zebua, Osea]]>;
<![CDATA[Firmansah, Danu]]>;
<![CDATA[Ginarsa, I Made]]>
<![CDATA[ DIELEKTRIKA Vol 9 No 1 (2022): DIELEKTRIKA ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram ]]>
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<![CDATA[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.]]>
<![CDATA[Monitoring Loss of Life Transformator Distribusi Menggunakan Internet of Things ]]>
<![CDATA[Zebua, Osea]]>;
<![CDATA[Komalasari, Endah]]>;
<![CDATA[Alam, Syaiful]]>
<![CDATA[ DIELEKTRIKA Vol 9 No 1 (2022): DIELEKTRIKA ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram ]]>
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<![CDATA[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.]]>
<![CDATA[Optimasi Sistem Panel Surya dan Baterai Untuk Meminimasi Biaya Pemakaian Energi Listrik Rumah Tangga ]]>
<![CDATA[Zebua, Osea]]>;
<![CDATA[Ginarsa, I Made]]>
<![CDATA[ DIELEKTRIKA Vol 11 No 1 (2024): DIELEKTRIKA ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram ]]>
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DOI: 10.29303/dielektrika.v11i1.354
<![CDATA[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.]]>
<![CDATA[Optimasi Tegangan-Daya Reaktif Pada Penyulang Rayap Menggunakan Alternating Direct Methods of Multipliers ]]>
<![CDATA[Zebua, Osea]]>;
<![CDATA[Ginarsa, I Made]]>
<![CDATA[ DIELEKTRIKA Vol 12 No 1 (2025): DIELEKTRIKA ]]>
Publisher : <![CDATA[Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram ]]>
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DOI: 10.29303/dielektrika.v12i1.413
<![CDATA[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.]]>
