Performance Evaluation of Lightning Protection Zones on Yogyakarta–Solo DC Railway Electrification Using Rolling Sphere and Protective Angle Methods
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Keywords
Overhead Contact System, Lightning Protection, Rolling Sphere Method, Protective Angle Method, Yogyakarta-Solo Line
Abstract
The Yogyakarta - Solo commuter line operates an Overhead Contact System (OCS) at 1500 V DC across an area that experiences more than 60,000 cloud-to-ground lightning strikes annually, resulting in 1,314 recorded incidents in the Brambanan segment alone in 2019. These strikes risk disrupting electrical flow and halting train operations. This study evaluates the OCS lightning protection system to maximize transmission efficiency. Using standards from PUIPP, IEC, SNI, and IEEE, a comparative analysis of protection zones was conducted between the protective angle and rolling sphere methods. The evaluation shows that the rolling sphere method provides superior coverage compared to the protective angle method. Specifically, the rolling sphere method achieves average protection angles of 42.42° on the cantilever pole and 56.57° on the V-truss beam. Meanwhile, the protective angle method yields 56.00° on the cantilever pole and 56.30° on the V-truss beam. The findings demonstrate that the rolling sphere method provides a more rigorous and reliable protection zone, making it highly recommended for future infrastructure upgrades on the Yogyakarta - Solo line to minimize lightning-induced operational disruptions.
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Anindira Listy Hartisa, Universitas Negeri Semarang
An Assistant Railway Signaling Analyst with 2 years experience in the field of signalling, electricity and telecommunication of railway systems. a Master Student in Electrical Engineering Department at the Universitas Diponegoro, Semarang, Indonesia. She received her S.T., in 2022 with cum laude from Sultan Agung Islamic University, Indonesia. Her research interests include power electronics, signal systemvisibility, telemetri early warning, visibility Sistem dan Teknologi Informasi, visibility Data Mining, visibility, Railway Protection System Evaluation, and its applications. I have experience as a LSP Energy certified 2023 Electrical Energy System Auditor, Railway Infrastructure Maintenance, and Railway Infrastructure Inspector certified by An. Director General of Railways c.q Director of Railway Safety.Abdul Syakur, Diponegoro University
A senior lecturer in Electrical Engineering Department at Universitas Diponegoro, Semarang, Indonesia. He received his B.Eng., M.Eng. and Ph.D. degrees in Electrical Engineering from Universitas Diponegoro, Institut Teknologi Bandung and Universitas Gadjah Mada, in 1997, 2002 and 2015, respectively. He has been an Associate Professor in Universitas Diponegoro, Semarang, Indonesia since 2007. He is currently the head of high-voltage innovation and technology (Hi-VIT) research laboratory also member of IEEE since 2011 until now. His research interests include high-voltage generation, high-voltage insulation technology, electrical tracking in insulator materials, partial discharge, lightning phenomenon, and its protection system