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All Journal CYCLOTRON Electrices : Jurnal Otomasi Kelistrikan dan Energi Terbarukan International Journal of Electrical, Computer, and Biomedical Engineering (IJECBE)
Widyanto, Aji Nur
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Medicine & Pharmacology

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Lightning Performance Design Review of 150kV Overhead Transmission Line Hakim, Fakhri; Fitri, Ismi Rosyiana; Widyanto, Aji Nur
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 3 No. 2 (2025)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v3i2.122

Abstract

Lightning overvoltage constitutes the predominant cause of transmission line interruptions in Indonesia, significantly compromising system safety and reliability. This paper presents comprehensive simulations of lightning performance on 150kV overhead transmission lines using ATP-EMTP software, with particular focus on evaluating shielding failure and back flashover occurrences on one of the standard tower designs used by PT PLN (Persero). The transmission line model incorporates shielding wires, phase conductors, tower surge impedance, current-dependent footing resistance behavior, and arcing horns. Simulations were conducted to investigate three key aspects: maximum shielding failure current based on various Electrogeometric Model (EGM) constants, the impact of footing resistance on critical flashover current, and the effect of arcing horn length variations on critical flashover current. The analysis also accounts for phase angle variations in system voltage. Results highlight the significant influence of these variables on the Lightning Flashover Rate (LFR) of existing tower designs. Increasing footing resistance from 10Ω to 20Ω elevates Back Flashover Rate (BFOR) by 16.39%, while further increases to 30Ω and 40Ω yield only marginal increases of 17.33% and 17.76%, respectively. Notably, arcing horn gap length modifications demonstrate substantial performance improvements, with 1.4m and 1.5m gaps reducing LFR by 17.37% and 30.87%, respectively, compared to the 1.3m reference configuration. Analysis of maximum shielding-failure currents across varying EGM coefficient sets indicates that shield wires fail to intercept currents in the range of 2.53 kA to 52.81 kA.
Studi Tekno-Ekonomi Sistem Fotovoltaik On-Grid Pada Bangunan Industri Kontrol Satelit Widyanto, Aji Nur; Gaviarsha, Muhammad; Husnayain , Faiz; Utomo , Agus R; Ardita , I Made
Electrices Vol 5 No 1 (2023): Volume 5 Nomor 1 Tahun 2023
Publisher : Jurusan Teknik Elektro, Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/ees.v5i1.5778

Abstract

Penggunaan energi fosil di Indonesia masih tinggi. Pemerintah Indonesia berkomitmen dengan menargetkan penggunaan energi terbarukan sebesar 23% pada tahun 2025. Komitmen ini diikuti oleh PLN (Perusahaan Listrik Negara) dengan menargetkan pembangunan pembangkit energi terbarukan sebesar 10,6 GW guna mencapai target pemerintah tersebut. Salah satu potensi energi terbarukan yang cukup menjanjikan di Indonesia adalah pembangkit listrik tenaga surya. Penelitian ini difokuskan pada perancangan sistem fotovoltaik (PV) on-grid di salah satu industri satelit di Indonesia. Beban listrik harian pada PT. RST adalah 1850 kWh. Berdasarkan beban listrik tersebut, maka kapasitas optimum untuk mendesain sistem PV on-grid yang dibutuhkan sebesar 230,8 kW, dengan total luas area yang digunakan adalah 1329,21 meter persegi. Untuk mendapatkan hasil yang optimal, sudut kemiringan PV harus sebesar 9 derajat dan menghadap ke utara. Setelah menjalankan simulasi, dapat diketahui bahwa rata-rata total daya yang dihasilkan per hari adalah 987,38 kWh dengan LCOE sebesar Rp.868,29. LCOE sistem PV ini lebih murah dari standar BPP nasional sehingga sistem ini layak untuk dibangun. Aspek ekonomi lainnya dari hasil simulasi menunjukkan bahwa tingkat ROI adalah 7,1% dan tingkat IRR sebesar 10,3% - serta payback period akan membutuhkan waktu sekitar sepuluh tahun.
Reliability Assessment of Interconnected Substations Using the Reliability Block Diagram Approach Hermoyo, Ganis; Fitri, Ismi Rosyiana; Widyanto, Aji Nur
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 3 No. 3 (2025)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v3i3.123

Abstract

The reliability of substations plays a crucial role in maintaining the continuity and stability of power supply in transmission systems. This study evaluates the reliability level of two interconnected 150 kV substations using the Reliability Block Diagram (RBD) approach. The RBD model is applied to map the actual component configuration, from major component levels to the system level, based on operational age and component failure rate data. Simulation results show that System1 has a reliability value of 0.907735, while System2 reaches 0.979424. This discrepancy indicates a potential for reliability improvement through component rejuvenation strategies. A scenario simulating the replacement of critical equipment successfully increased the reliability of system1 to 0.980168 and raised the overall reliability of the interconnected system to 0.959989. These findings suggest that a prioritized maintenance or renewal of component strategy targeting critical component can significantly enhance the overall reliability of the transmission system.
Analysis of Single Phase to Ground Faults Caused by Animals on Energy Not Served (ENS) in the Sumatera System Januarsyah, Ginanjar; Widyanto, Aji Nur; Husnayain, Faiz
International Journal of Electrical, Computer, and Biomedical Engineering Vol. 3 No. 3 (2025)
Publisher : Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62146/ijecbe.v3i3.124

Abstract

Animal disturbances on the High Voltage / Extra High Transmission Air Lines (SUTT / SUTET) in the work area of PT PLN (Persero) Sumatra Load Regulation and Distribution Center Main Unit (UIP3B Sumatra) during the period 2020-2024 have caused 208 animal disturbances on transmission lines and 35 animal disturbances on power transformers. This study provides information on mitigating animal interference, analyzing trends or patterns of animal habits that cause interference, and providing information on Energy Not Served (ENS). The data covers the period from 2020 to 2024, with a focus on evaluating the types of animals causing interference, the frequency and duration of outages, load data at the time of interference and the effectiveness of mitigation implemented, including recording the date, location, animal species, event classification, causal factors and response actions taken. This approach aims to improve understanding of the impact and behavior of wildlife on energy supply and to improve reliability and reduce the number of ENS.  The results showed that the behavior of each animal was consistent with the fault data analysis, and the largest amount of undelivered power was monkeys 629.15  MWh, followed by birds 391.167 MWh and 358.04 MWh. Reducing the number of disturbances is done by preventive maintenance in animal-prone areas, with regular monitoring and evaluation so that ENS can be minimized
Evaluasi Sistem Proteksi Petir Eksternal pada Bangunan Pusat Perbelanjaan Studi Kasus Gedung XYZ Mahira, Athaya; Widyanto, Aji Nur; Husnayain, Faiz; Fitri, Ismi Rosyiana
CYCLOTRON Vol 7 No 02 (2024): CYCLOTRON
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/cl.v7i02.23283

Abstract

Sustainable Development Goals (SDGs) adalah 17 tujuan global yang disusun oleh Perserikatan Bangsa-Bangsa untuk mengatasi berbagai tantangan global seperti kemiskinan, degradasi lingkungan, perdamaian, dan perubahan iklim. Salah satu tujuannya adalah poin 11, "sustainable cities and communities," yang bertujuan membuat kota dan pemukiman manusia inklusif, aman, tangguh, dan berkelanjutan. Indonesia, dengan iklim tropisnya, rentan terhadap hujan petir yang bisa menyebabkan kerusakan elektronik, cedera, kematian, dan kebakaran. Dengan Indeks Kerawanan Petir (IKL) 45%, Jakarta adalah salah satu kota dengan risiko tinggi terhadap petir, sehingga penting untuk mengevaluasi sistem proteksi petir pada bangunan perkotaan. Salah satu bangunan yang banyak di Jakarta merupakan bangunan pusat perbelanjaan. Penelitian ini menganalisis risiko pada salah satu bangunan pusat perbelanjaan di Jakarta, Gedung XYZ, yang dilakukan berdasarkan standar nasional dan internasional. Sistem proteksi petir eksternal yang terpasang adalah Early Streamer Emission (ESE). Evaluasi dilakukan berdasarkan standar NF C 17-102 dengan fokus pada terminal udara, konduktor penyalur, dan sistem pentanahan. Empat skenario perbaikan area proteksi terminal udara ditawarkan: penggeseran, penambahan, penggantian batang penangkal, dan aplikasi sistem konvensional. Perbaikan sistem grounding melibatkan pemasangan ground ring electrode atau penambahan elektroda pentanahan di setiap sistem terminasi tanah.
Co-Authors Ardita , I Made Fitri, Ismi Rosyiana Gaviarsha, Muhammad Hakim, Fakhri Hermoyo, Ganis Husnayain , Faiz Husnayain, Faiz Januarsyah, Ginanjar Mahira, Athaya Utomo , Agus R