Voltage Regulation and Power Loss Analysis on 500 kV EHV Transmission Line Krian-Grati

Reza Sarwo Widagdo; I Made Kastiawan; Imam Suri Tauladan; Indra Budi Hermawan

doi:10.31258/ijeepse.8.1.40-54

Reza Sarwo Widagdo Universitas 17 Agustus 1945 Surabaya, Indonesia
I Made Kastiawan Universitas 17 Agustus 1945 Surabaya, Indonesia
Imam Suri Tauladan Universitas Riau, Pekanbaru, Indonesia
Indra Budi Hermawan Universitas 17 Agustus 1945 Surabaya, Indonesia

DOI: https://doi.org/10.31258/ijeepse.8.1.40-54

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Keywords: Extra High Voltage Main Substasion, Power Loss, Transmission Lines, Voltage Regulation

Abstract

The transmission system distributes electricity from power plants to substations before reaching consumers. During this process, obstacles such as power loss and voltage regulation occur, which must meet specific standards to prevent equipment damage. Power loss can result from factors like corona effects and insulator leakage. This study aims to analyze power loss and voltage regulation based on daily peak load data at 14:00 over 15 days, recording current and voltage values on the extra-high voltage Krian-Grati transmission network. This system uses ACSR Gannet conductors with a cross-sectional area of 392.84 mm² and a length of 79.41 km, having a resistance of 0.00086 Ω/km. Manual calculations for short transmission lines show a voltage difference between sending and receiving ends, with the sending voltage being slightly higher due to reactance, preventing a drastic voltage drop. Over 15 days in December 2024, voltage regulation did not exceed the standard maximum of <10%, with the highest recorded value at 4.7%. The highest power loss occurred on day 7 at 0.089 MW, while the lowest was on day 9 at 0.023 MW. The total power loss over 15 days reached 1.024 MW, with a daily average of 0.068 MW.

Author Biographies

I Made Kastiawan, Universitas 17 Agustus 1945 Surabaya, Indonesia

Department of Mechanical Engineering, Universitas 17 Agustus 1945 Surabaya, Indonesia

Imam Suri Tauladan, Universitas Riau, Pekanbaru, Indonesia

Department of Electrical Engineering, Universitas Riau, Indonesia

Indra Budi Hermawan, Universitas 17 Agustus 1945 Surabaya, Indonesia

Department of Electrical Engineering, Universitas 17 Agustus 1945 Surabaya, Indonesia

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