PENGGUNAAN METODE DIRECT GROUNDING DAN COUNTERPOISE PADA PERHITUNGAN PENTANAHAN PADA TOWER TRANSMISI 150 KV DI LINE MAROS – BOLLANGI DAN SUNGGUMINASA-MAROS
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Bhaskara, Adji
Pasra, Nurmiati
Pasra, Nurmiati
Subject
Teknik Elektro
Datestamp
2022-11-02 06:26:19
Abstract :
ABSTRACT The grounding system on the transmission network SUTT tower is part of the electrical installation that functions to secure electrical equipment. This grounding system has low impedance properties, so that the excessive current caused by lightning strike disturbances can be flowed quickly to the ground so as to minimize damage to tower equipment and secure living things that are active around the transmission tower. This thesis discusses direct grounding and grounding at the foot of the tower on the Sungguminasa-Maros and Maros-Bollangi lines. To determine the direct grounding resistance value and the tower foot grounding resistance value, it is necessary to measure each transmission tower by measuring directly on the tower using a Megger. The results show that the grounding resistance value of the transmission line SUTT tower should be on the 70 kV tower. The resistance value should be 5? and for the 150 kV-175kV tower the resistance value should be 10? and the 500 kV SUTET transmission tower should be 15? because the electric current will pass through the conductor with low resistance value, so if the resistance value of the transmission tower is high, it will be easily affected by lightning strikes. The resistance value before maintenance using the Direct Grounding method on tower 60 is 9.65? and after maintenance it gets a resistance value of 3,30?. Whereas in tower 69, before maintenance using the Counterpoise method, the resistance value obtained was 5.91? and after maintenance the results were 0.5?.
ABSTRACT The grounding system on the transmission network SUTT tower is part of the electrical installation that functions to secure electrical equipment. This grounding system has low impedance properties, so that the excessive current caused by lightning strike disturbances can be flowed quickly to the ground so as to minimize damage to tower equipment and secure living things that are active around the transmission tower. This thesis discusses direct grounding and grounding at the foot of the tower on the Sungguminasa-Maros and Maros-Bollangi lines. To determine the direct grounding resistance value and the tower foot grounding resistance value, it is necessary to measure each transmission tower by measuring directly on the tower using a Megger. The results show that the grounding resistance value of the transmission line SUTT tower should be on the 70 kV tower. The resistance value should be 5? and for the 150 kV-175kV tower the resistance value should be 10? and the 500 kV SUTET transmission tower should be 15? because the electric current will pass through the conductor with low resistance value, so if the resistance value of the transmission tower is high, it will be easily affected by lightning strikes. The resistance value before maintenance using the Direct Grounding method on tower 60 is 9.65? and after maintenance it gets a resistance value of 3,30?. Whereas in tower 69, before maintenance using the Counterpoise method, the resistance value obtained was 5.91? and after maintenance the results were 0.5?.
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