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All Journal Mechatronics, Electrical Power, and Vehicular Technology Bulletin of Electrical Engineering and Informatics Jurnal EECCIS CYCLOTRON
Kevin Marojahan Banjar-Nahor
Institut Teknologi Bandung
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Comparison of photovoltaic nanogrid implementation: a simple reliability model for frontier, remote, and disadvantaged areas Ryandi Ryandi; Kevin Marojahan Banjar-Nahor; Nanang Hariyanto
Bulletin of Electrical Engineering and Informatics Vol 11, No 5: October 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v11i5.3814

Abstract

This paper aims to evaluate the photovoltaic (PV) nanogrid implementation and its risk for a project at a remote location. Unlike the normal approach, this approach is based on a discontinuity project. The main advantage of the model is the simplicity to compute the expected lifetime and display the reliability curve. The reliability is calculated using state space equation and a quantitative approach evaluates the risk of PV nanogrid scenarios based on costs. The MATLAB/Simulink simulates the scenarios including the basic scenario of a PV system that is a PV nanogrid consisting of a PV array and inverter, scenario 1 that is a PV nanogrid with a battery system, scenario 2 is an extension of scenario 1 with a battery repair, and scenario 3 is a PV nanogrid connected to the grid. The result indicates that adding a battery system increases the reliability and the expected lifetime of the system, and the battery system’s maintenance makes it higher. Scenario 3 shows high reliability and a longer expected lifetime. The risk matrix shows the position of reliability and its impact on each scenario. This work can be used in practice as an objective assessment to electrify frontier, remote, and disadvantaged (3T) areas beside levelized cost of energy (LCOE).
Quasi-dynamic hosting capacity in radial distribution feeder Riki Khomarudin; Kevin Marojahan Banjar-Nahor; Nanang Hariyanto
Journal of Mechatronics, Electrical Power, and Vehicular Technology Vol 14, No 1 (2023)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.mev.2023.v14.62-71

Abstract

The target of massive installation of renewable energy is the focus of this research. Several industrial sectors continue to install photovoltaic rooftop to support green energy. One of the main objectives of this research is to see the maximum impact of installing a photovoltaic rooftop at 1 point of customer and spread capacity for each customer. This research uses a radial distribution network system that closely resembles the distribution network in Indonesia, where the load profile considers the load characteristics of industrial, commercial, and residential loads. This study uses the line equation theorem method to calculate the voltage rises by considering two current measurement points: the current at the end and the current at the base. The obtained voltage rise is then accumulated to be summed up with the customer afterward. The results are obtained by considering three scenarios: 1) voltage limits, 2) voltage limits and line loading, and 3) voltage limits, thermal, and harmonics in accordance with regulations. The obtained results are closely aligned with the simulations performed on the hosting capacity software such as DIgSILENT.
Desain Koordinasi Sistem Proteksi Untuk Microgrid Berbasis Inverter Banjar-Nahor, Kevin Marojahan; Ikhsan, Muhammad; Hariyanto, Nanang
Jurnal EECCIS (Electrics, Electronics, Communications, Controls, Informatics, Systems) Vol. 16 No. 3 (2022)
Publisher : Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jeeccis.v16i3.1615

Abstract

Pada sistem microgrid berbasis inverter terdapat masalah terkait kecilnya level arus hubung singkat. Hal ini terjadi karena komponen dari inverter yaitu switch, yang biasanya IGBT atau MOSFET, memiliki batas arus tertentu yang tidak boleh terlewati untuk menjaga integritas komponen saklar elektronik. Arus gangguan dari inverter ini dapat bernilai lebih kecil dari arus pickup rele arus lebih konvensional. Hal ini berpotensi mengakibatkan gagalnya deteksi gangguan berbasis arus lebih, yang umum dipakai di tegangan rendah dan menengah. Alternatif solusi untuk mengatasi masalah tersebut adalah dengan menggunakan rele 51V yang memiliki arus pickup lebih rendah ketika rele membaca tegangan jatuh. Paper ini akan membahas perancangan dan evaluasi proteksi arus lebih, koordinasi proteksi, dan pengaruh penggunaan NGR terhadap koordinasi proteksi di sistem microgrid berbasis inverter. Simulasi dilakukan menggunakan perangkat lunak DIgSILENT Power Factory untuk beberapa skenario pembangkitan, impedansi gangguan, lokasi gangguan, dan jenis gangguan. Dari studi ini, disimpulkan bahwa rele 51V mampu mengatasi persoalan tidak sensitifnya rele arus lebih konvensional dan juga direkomendasikan agar NGR tidak digunakan pada sistem microgrid berbasis inverter sehingga sistem dapat dioperasikan dengan pengetanahan langsung.
Optimization of Power System Stabilizer Parameters Using Genetic Algorithm Considering WECC Criteria Kevin Marojahan Banjar-Nahor; Rofi Maytsa Syahida; Nanang Hariyanto
CYCLOTRON Vol 9 No 01 (2026): CYCLOTRON
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ct.v9i01.30230

Abstract

Makalah ini membahas optimasi parameter Power System Stabilizer (PSS) menggunakan Genetic Algorithm (GA) yang diimplementasikan pada MATLAB dan DIgSILENT PowerFactory, dengan tujuan meningkatkan stabilitas sistem terhadap osilasi frekuensi rendah akibat pertukaran energi kinetik antar generator. Fokus utama diberikan pada model PSS2B, yang merupakan stabilizer yang banyak digunakan, dengan penyetelan parameter ditujukan untuk memenuhi standar performa yang ditetapkan oleh Western Electricity Coordinating Council (WECC) dan Aturan Jaringan Listrik Indonesia. Optimasi difokuskan pada parameter-parameter penting, termasuk gain stabilizer, konstanta waktu washout, dan konstanta waktu pada blok Lead-Lag Compensator. Melalui analisis eigenvalue dan evaluasi respon frekuensi, proses optimasi menunjukkan bahwa pendekatan Genetic Algorithm menghasilkan parameter yang memenuhi persyaratan regulasi yang ketat. Efektivitas parameter hasil optimasi dievaluasi menggunakan berbagai indikator performa, seperti bode plot, lokasi nilai eigen, dan simulasi domain waktu. Hasil penelitian ini menegaskan kemampuan teknik Genetic Algorithm dalam meningkatkan kinerja PSS serta memastikan kepatuhan terhadap standar yang berlaku.
Co-Authors Khomarudin, Riki Muhammad Ikhsan Nanang Hariyanto Nanang Hariyanto Rofi Maytsa Syahida Ryandi Ryandi