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All Journal SITEKIN: Jurnal Sains, Teknologi dan Industri Jurnal Teknik Elektro dan Komputasi (ELKOM)
Eka Putra, R. Reski
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Other

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Optimal Coordination of Directional Overcurrent Relays Using a Modified Grey Wolf Optimization Algorithm Considering Multiple Characteristic Curves Eka Putra, R. Reski; Pujiantara, Margo; Harjian, Muhammad Rivaldi; Winarta, Fadhel Putra; Fahreza, Muhammad
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 22, No 1 (2024): December 2024
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v22i1.33737

Abstract

The effective coordination of directional overcurrent relays (DOCRs) is essential for maintaining the stability and dependability of power systems. This work presents a modified grey wolf optimization (MGWO) approach for addressing the DOCR coordination problem. The MGWO algorithm improves the original grey wolf optimization (GWO) by increasing convergence characteristics and balancing the exploration and exploitation stages. This equilibrium is attained by a dimension learning-hunting method and a quadratic reduction in the control parameter during the optimization phase. DOCR coordination is optimized using the MGWO method, using decision factors such as pickup current, time dial setting, and curve type. The goal is to reduce the total working time of primary relays while maintaining selectivity and shortening the discrimination time between primary and backup relays. The suggested MGWO technique is evaluated on the IEEE 8 bus system with two scenarios and compared to other optimization approaches. The results reveal that MGWO outperforms previous algorithms, achieving improvements in the objective function ranging from 5.52% to 58.19%. Additionally, the DOCR settings created by MGWO are evaluated using ETAP software to assure compliance with operational requirements and prevent violations of DOCR coordination.Keywords: Directional Overcurrent Relay Coordination, Grey Wolf Optimization, Multiple Curves, Pickup Current, Time Dial Setting.
Study of 150 kV Overhead Transmission Line Configuration Planning from Kambang Pesisir Selatan to Bengkulu City Putra Winarta, Fadhel; Nasir Sonni, Muhammad; Eka Putra, R. Reski; Fahreza, Muhammad; Wahyudi, Ricky
Jurnal Teknik Elektro dan Komputasi (ELKOM) Vol 7, No 2 (2025): ELKOM
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/elkom.v7i2.22636320

Abstract

The need for electricity is increasing due to the rise of human living standards, therefore, the provision and supply of electrical energy must be increased. To meet the increasing electricity demand, the construction of new generating plants or expanding of the transmission network is required. The most rational alternative to overcome the growing load in the Bengkulu Province is to construct a 150 kV transmission network from Kambang (Pesisir Selatan, West Sumatra Province) to Bengkulu (Bengkulu Province). Therefore, the Bengkulu region gets electricity supply from two areas, i.e.  the Central Sumatra Subsystem and the South Sumatra Jambi and Bengkulu Subsystem (S2JB). This 150 kV Transmission line span across of 396 kms that is matched with the government policy as an effort to enhance network reliability and adequacy of electricity supply in Sumatera region. This research aims to plan a transmission line from Kambang to Bengkulu City using load forecast based on the 2019-2028 RUPTL data of the Bengkulu area until year 2050. Calculation of 150 kV transmission line configuration is conducted by considering voltage regulation and load flow analysis by ETAP Software. The result of the Kambang – Bengkulu transmission line planning has capacity of 200 MW with receiving voltage of 150 kV, and frequency of 50 Hz, using 240 mm2 ACSR conductors with double circuit configuration and 2 bundle of conductor per circuit. The transmission line resistance is , the inductance of    and the capacitance of . The voltage regulation is 2,1% and the total line loss is 1.574 MW
Co-Authors Fahreza, Muhammad Harjian, Muhammad Rivaldi Margo Pujiantara Nasir Sonni, Muhammad Putra Winarta, Fadhel Ricky Wahyudi Winarta, Fadhel Putra