ABSTRAKTransmisi daya listrik menggunakan saluran udara tegangan tinggi, sehingga sangat rentan terhadap gangguan karena jarak yang sangat jauh. Oleh karena itu, dibutuhkan keandalan sistem proteksi yang tinggi untuk mengamankan saluran udara tersebut. Untuk memenuhi keandalan tersebut, maka pada saluran transmisi perlu dilakukan pemasangan rele jarak. Objek penelitian pada saluran transmisi yang menghubungkan Gardu Induk Garuda Sakti dan Gardu Induk Pasir Putih yang dikelola oleh PT. PLN (Persero) Unit Pelayanan Transmisi Pekanbaru. Saat penelitian ini dilakukan Penghantar 150 kV Garuda Sakti -Pasir Putih belum beroperasi. Dalam penelitian ini dilakukan perhitungan nilai impedansi primer dan impedansi sekunder penghantar 150 kV Garuda Sakti-Pasir Putih dengan panjang penghantar sejauh 31,16 km kemudian setting rele jarak pada zona-1, zona-2, dan zona-3, lalu disimulasikan dengan menggunakan software PSCAD. Berdasarkan analisa yang telah dilakukan diperoleh hasil perhitungan rele jarak di penghantar 150 kV Garuda Sakti-Pasir Putih pada zona-1 sebesar 1,0529 Ohm, zona-2 sebesar 2,2519 Ohm, dan zona-3 sebesar 3,3778 Ohm. Kemudian hasil perhitungan disimulasikan dengan menggunakan software PSCAD dan didapatkan semua gelombang impedansi gangguan berada dalam lingkaran zona yang menandakan rele jarak akan bekerja saat terjadi gangguan. ABSTRACT Power transmission uses high-voltage overhead line, making it extremely susceptible to disturbance because very long distances. Therefore, it needed protection system with high reliability to protect the overhead line transmission. To get the reliability, then on the transmission line needs to be installed distance relay. The object of research on the transmission line that connects the Garuda Sakti Substation and the Pasir PutihSubstation that managed by PT. PLN (Persero) Unit Pelayanan Transmisi Pekanbaru. At the time of this study, Line 150 kV Garuda Sakti -Pasir Putih was not operated. In this research, calculation of primary impedance and secondary impedance of Line150 kV Garuda Sakti -Pasir Putih with as far as 31.16 km, then distance relay setting in zone 1, zone 2, and zone 3, then simulated using PSCAD software. Based on the analysis that has been done obtained distance relay calculation results of Line 150 kV Garuda Sakti -Pasir Putih in zone 1 of 1.0529 Ohm, zone 2 of 2,2519 Ohm, and zone 3 of 3,3778Ohm. Then the calculation result is simulated using PSCAD software and got all impedance faults waves are in zone circle indicating the distance relay will work when disturbance occurs.
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