ANALISA PROTEKSI PETIR PADA GARDU DISTRIBUSI 20 KV PT PLN (PERSERO) RAYON INDERALAYA

Rahayu Rahayu, Ansyori Ansyori

Abstract


Abstrak-Dalam pendistribusian energi listrik, terkadang mengalami gangguan dalam proses penyalurannya sehingga berpengaruh dengan kontinuitas pelayanan distribusi daya listrik ke konsumen, salah satu penyebabnya adalah gangguan yang disebabkan oleh petir. Petir merupakan suatu peristiwa alam yang terjadi karena proses pemuatan energi listrik di awan. Karena ada awan bermuatan negatif dan awan bermuatan positif, petir juga bisa terjadi antar awan yang berbeda muatan. dimana salah satu awan bermuatan negatif dan awan lainnya bermuatan positif. Pada tugas akhir ini, dibahas tentang analisa proteksi petir pada gardu distribusi 20 kV PT PLN (Persero) Rayon Inderalaya, maka akan di analisa proteksi petir yang digunakan berdasarkan jarak antara arrester dan transformator. Dengan jumlah hari guruh 142, dan data-data konstruksi saluran udara, maka didapat lebar bayang-bayang sebesar 50,06208 meter dan luas bayang-bayang 5,006208 km2 per 100 km saluran., jumlah sambaran ke saluran sebanyak 106,63223 sambaran per 100 km per tahun. dan besarnya tegangan induksi ke saluran sebesar 225,08706 kV. Jarak ideal antara arrester dan transformator adalah 2,06573 m, sedangkan yang terpasang di lapangan adalah 1,5 m. Kondisi ini bisa dikatakan aman. Pada saat diaplikasikan dalam diagram tangga, besarnya tegangan yang dirasakan transformator dibawah nilai BIL transformator pada pantulan pertama selama 0,005 μs.

Kata Kunci: Petir, Arrester, Transformator, Gelombang Berjalan

Abstract-In distribution of electrical energy, that sometimes get disturbance in distribution process so that had an effect on continuance electic power distribution service to the consumer, one of causing is disturbance by lightning. Lighning is natural phenomenom which happen by electrical energy charging process on the cloud. There is a cloud which had negative charge and positive charge. Lightning sometimes happen in inter-cloud whose had different charge, which one of cloud with negative charge and another cloud with positive charge. In this final assignment, is investigated about analyze lightning protection in distribution station 20 kV PT PLN (persero) Rayon Indralaya, so then will analyze lightning protection in use base on distance of arrester and transformer. With quantity of isokeraunic level is 142 and the data distribution line, the importance of the width of the shadow of 50.06208 meters wide and shadows 5.006208 km2 per 100 km line, number of lightning strikes to the line as much as 106.63223 per 100 km per year. And the magnitude of the induced voltage to the line of 225.08706 kV. The ideal distance between arrester and transformer is 2.06573 m. While mounted on the ground is 1.5 m. This condition can be said to be safe. At the moment applied in the ladder diagram, the perceived magnitude of the voltage transformer transformer under BIL value at the first reflection for 0.005 μs.

Keywords. Lightning, Arrester, Transformer, Traveling Wave


Keywords


Petir, Arrester, Transformator, Gelombang Berjalan

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