Skripsi

KOMPARASI PENGAMATAN INITIAL BREAKDOWN PULSE TRAIN PADA STASIUN PETIR UNIVERSITAS SRIWIJAYA KAMPUS PALEMBANG

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Penilaian

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The electrical discharge process known as Initial Breakdown (IB) is the initial trigger for a cloud-to-ground (CG) lightning flash. This phenomenon arises from the intensification of the electric field by a positive charge pocket located below the main negative charge center within a cumulonimbus cloud. This study aims to observe the presence of IB pulse trains that initiate the first return stroke (1st RS) in negative CG-flashes, analyze the characteristics of these pulse trains, and compare the results with previous research. Data collection was conducted during August 2025 in Palembang, Indonesia (2˚52’ - 3˚5’ S), by recording electric field changes from tropical thunderstorms within a 30 km range using a parallel-plate antenna system. The collected data were subsequently processed through quantitative statistical analysis. The results show that 85 out of 93 negative CG flashes (91%) were initiated by the IB process. The relationship between the IB and the 1st RS was analyzed through four main parameters. The arithmetic means found were: an IB/RS ratio of 59,7% (range 9,48–297,3%), N/RS ratio of 4.5% (range 1,72–10,77%), IB-RS separation of 25,6 ms (range 2,18–175,5 ms), and pre-RS duration of 26,4 ms (range 2,94–177,7 ms). Furthermore, analysis of 12 flashes with the "BIL" model revealed the characteristics of the IB pulse trains, with an average pulse train duration of 3,4 ms (range: 1,2–13,8 ms), inter-pulse time interval of 171 µs (range 6,2–1452,9 µs), individual pulse duration of 12,4 µs (range 1.3–35.5 µs), and individual pulse amplitude peak of 270 mV (range 68,1–1389 mV). Therefore, this research confirms that the duration of the IB process is longer in near-equatorial regions, with significant influence from changing environmental conditions and specific geographical factors.

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Availability

Inventory Code	Barcode	Call Number	Location	Status
2507006218	T185575	T1855752025	Central Library (Reference)	Available but not for loan - Not for Loan

Detail Information

Series Title

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Call Number

T1855752025

Publisher

Indralaya : Prodi Teknik Elektro, Fakultas Teknik Universitas Sriwijaya., 2025

Collation

xxv, 157 hlm.; ilus.; tab.; 29 cm.

Language

Indonesia

ISBN/ISSN

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Classification

551.554 07

Content Type

Text

Media Type

unmediated

Carrier Type

other (computer)

Edition

-

Subject(s)

Prodi Teknik Elektro
Teknik Kelistrikan--Petir

Specific Detail Info

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Statement of Responsibility

MI

Other version/related

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