Pemodelan Perlindungan Gardu Induk dari Sambaran Petir Langsung di PT. PLN (Persero) Gardu Induk 150 kV Ngimbang-Lamongan

Nina Dahliana Nur, I Gusti Ngurah Satriyadi Hernanda, Wahyudi Wahyudi
Submission Date: 2014-02-06 17:12:46
Accepted Date: 2014-03-15 00:00:00

Abstract


Sambaran petir bisa meyebabkan kegagalan perlindungan pada gardu induk seperti terjadinya flashover dan kerusakan peralatan di gardu induk. Akibatnya adalah terjadinya gangguan pasokan listrik dan kerugian ekonomi cukup besar. Oleh karena itu diperlukan sistem proteksi sambaran petir untuk meminimalisir sambaran petir langsung ke peralatan dan bus di dalam gardu induk. Pada tugas akhir ini dibahas mengenai pemodelan perlindungan gardu induk dari sambaran petir langsung menggunakan metode bola bergulir di Gardu Induk 150 kV Ngimbang Lamongan. Hasil perhitungan menunjukkan bahwa dengan konfigurasi pemakaian kawat tanah setinggi 18 m dengan jarak pisah 14 m seperti yang sudah ada di GI 150 kV Ngimbang Lamongan telah aman dari sambaran petir langsung. Kemudian diberikan alternatif perlindungan lain yaitu dengan memasang lightning mast (tiang penangkal petir). Lightning mast yang dibutuhkan sebanyak 23 buah dengan tinggi 26 m.

Keywords


gardu induk; kawat tanah; lightning mast; metode bola bergulir; petir

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