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All Journal Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Jurnal Rekayasa Material, Manufaktur & Energi Rang Teknik Journal Menara Ilmu Ensiklopedia Education Review Jurnal Vokasi Reswara: Jurnal Pengabdian Kepada Masyarakat Teknika Sains : Jurnal Ilmu Teknik IJIMCE : International Journal of Innovation in Mechanical Construction and Energy
Aggrivina Dwiharzandis
Dosen - Universitas Muhammadiyah Sumatera Barat
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KOMPARASI PENENTUAN LOKASI GANGGUAN ANTARA FAULT LOCATOR DAN RELE JARAK PADA PENGHANTAR 150 KV TELUK KUANTAN-RENGAT Arifin, Jamal; Yamashika, Herris; Dwiharzandis, Aggrivina
Rang Teknik Journal Vol 9, No 2 (2026): Vol. 9 No. 2 Juni 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v9i2.7910

Abstract

Transmission system reliability is an essential factor in maintaining continuous power supply. Accurate and fast fault location identification is necessary to shorten repair time. This study compares two fault location determination methods, namely the Fault Locator based on Traveling Wave Signal (TWS) and the Distance Relay based on impedance on the 150 kV Teluk Kuantan–Rengat transmission line. The results show that the TWS method has a smaller error rate compared to the impedance method. The average error using TWS is 0.42%, while the impedance method shows 1.86%. Thus, the TWS method is more accurate and recommended for use in 150 kV transmission systems.Keywords: fault locator, traveling wave, distance relay, transmission system, fault location
KOMPARASI PENENTUAN LOKASI PEMASANGAN KAPASITOR ANTARA GI. DUMAI DAN GI. BAGAN SIAPI-API Hazri, M Wahyudi; Yulisman, Yulisman; Dwiharzandis, Aggrivina
Rang Teknik Journal Vol 9, No 2 (2026): Vol. 9 No. 2 Juni 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v9i2.7911

Abstract

During peak load conditions, significant voltage drops are observed in the Dumai transmission subsystem. The minimum voltages recorded at the Dumai, Bagan Siapi-api, and Dumai Industrial Area substations are 134.7 kV, 133.0 kV, and 131.1 kV, respectively, exceeding the permissible voltage deviation limits. To mitigate this condition, a shunt capacitor is designed and evaluated through modeling and simulation. Analytical and DigSILENT PowerFactory 2021 simulation results indicate that a 25 MVAR shunt capacitor installed at the Bagan Siapi-api Substation provides the most suitable compensation. The installation increases the bus voltage by 8.10 kV to 141.10 kV, corresponding to a voltage deviation of 5.93% from the nominal value. Furthermore, total system losses in the Riau subsystem are reduced from 20.63 MW and −352.8 MVAR to 19.88 MW and −366.8 MVAR, or reduction 0,75 MW. These results confirm that shunt capacitor integration effectively improves voltage profiles while reducing reactive power flow and system losses.Keywords: shunt capacitor, substation, voltage drop, DIgSILENT PowerFactory 2021, voltage improvement, system losses
PEMODELAN TRANSIEN ELEKTROMAGNETIK SUB SISTEM GITET NEW AUR DURI Vevel, Ofpria; Amin, Rahmat Rachim; Yamashika, Herris; Dwiharzandis, Aggrivina; Lovita, Wiwin
Rang Teknik Journal Vol 9, No 2 (2026): Vol. 9 No. 2 Juni 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v9i2.7988

Abstract

Electromagnetic transient modeling is an analytical method used to understand the transition phenomena that occur in electric power systems due to disturbances, such as short circuits, switching, and lightning. This study aims to conduct electromagnetic transient modeling on the GITET New Aur Duri subsystem to determine the characteristics of the system's response to transient conditions. The method used is system modeling using electric power system simulation software by entering network component parameters such as transmission lines, transformers, and voltage sources. The simulation results show that transient phenomena can cause rapid changes in voltage and current in a very short time. Therefore, this modeling is important to help analyze and understand system behavior so that it can improve the reliability and safety of electric power system operations on the GITET New Aur Duri subsystem.Keywords: electromagnetic transients, EMTP/ transient simulation, electric power systems, GITET New Aur Duri, power system disturbances, system modeling.
Co-Authors ., Maimuzar Ade Usra Berli Afriyani, Sicilia Aksa, Monica Klauzia Amin, Rahmat Rachim Amirul Luthfi Anjelika, Dea Qori Anuar, Bakri Arifin, Jamal Arwizet Arwizet, Arwizet Desmarita Leni Fitra, Muhammad Haris ., Haris Haris Haris, Haris Hariyadi, Hariyadi Hazri, M Wahyudi Helga Yermadona Ikhwana Elfitri Kesuma, Dytchia Septi Kurniawan Arief, Rudi Lovita, Wiwin Muharni, Riza NURUL HIDAYAH Qadhar, Muhammad Aziz Al Ruzita Sumiati Vevel, Ofpria Wirda Sri Farhani Yamashika, Herris YULISMAN