Nurcahyo, Muhamad Sigit (2019) Evaluasi Koordinasi Proteksi Over Current Relay (OCR) Dan Directional Ground Relay (DGR) Di Gardu Induk 150 KV Segoromadu. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Suatu sistem kelistrikan tidak akan lepas dari adanya gangguan yang dapat merusak peralatan. Untuk melindungi peralatan yang ada dibutuhkan sistem proteksi yang mampu menjaga kontinuitas dan keandalan sistem kelistrikan. Tidak hanya sistem kelistrikan pada suatu perusahaan atau pembangkitan saja yang membutuhkan sistem proteksi yang baik. Dalam menyalurkan tenaga listrik, PT PLN (Persero) sebagai penyedia listrik sangat membutuhkan sistem proteksi yang terkoordinasi dengan baik dan handal. Proteksi yang baik tentu membutuhkan koordinasi proteksi yang sesuai agar rele pengaman mampu mengamankan peralatan baik sisi distribusi maupun sisi transmisi di Gardu Induk 150 kV Segoromadu PT PLN (Persero). Rele pengaman yang dimaksudkan disini adalah Over Current Relay (OCR) dan Directional Ground Relay (DGR) serta Rele Diferensial sebagai pengaman utama trafo tenaga. Karena gangguan penyulang pada sisi distribusi sering terjadi, sehingga mengaktifkan rele arus lebih (OCR) dan gangguan ke tanah (DGR) tersebut untuk bekerja. Tidak hanya pada sisi penyulang gangguan juga dapat terjadi pada sisi transmisi dimana setting pada rele arus lebih dan rele Diferensial harus terkoordinasi dengan baik. Dari analisa kurva arus terhadap waktu kondisi exsisiting ditemukan beberapa rekomendasi dari hasil evaluasi. Dalam kondisi exsisting setting rele masih terdapat kekurangan untuk mengamankan peralatan listrik yang ada. Mulai dari setting pick up, time delay dan grading time 0.2 – 0.4 detik yang kurang sesuai dengan standar IEEE 242 untuk OCR dan DGR. Serta setting %Slope rele Diferensial yang lebih baik di sesuaikan dengan nilai gangguan eksternal dan internal dari trafo tenaga.
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An electrical system will not escape the interference that can damage the equipment. To protect existing equipment, a protection system is needed that is able to the continuity and reliability of the electrical system. Not only the electricity system in the company or the power plant that needs a good protection system. But in electricity distribution, PT PLN (Persero) as a provider of electricity requires a coordinated and reliable protection system. Good protection certainly has a coordination of protection in accordance with the needs, so that security relay can secure distribution and transmission equipment at the 150 kV Segoromadu Substation PT PLN (Persero). The protection relays intended here are Over Current Relay (OCR) and Directional Ground Relay (DGR) and Differential Relays as the main safety power transformers. Because many distribution feeders experience interference, causing overcurrent relays (OCR) and ground fault relay (DGR) to function. Not only the feeder distribution also occurs on the transmission side, the settings for overcurrent relay and Differential relay must be well coordinated. From the analysis of the time flow curve of the test conditions, there are recommendations found from the evaluation results. In the existing conditions of relay setting, there are still evaluations in securing electrical equipment. Starting from pickup settings, delay time and assessment time 0.2 - 0.4 seconds, which is not in accordance with the IEEE 242 standard. And relay differential settings of %slope, which are recommended according to the external and internal fault values of the power transformer.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSE 621.319 1 Nur e-1 2019 |
| Uncontrolled Keywords: | Coordination Protection, Over Current Relay, Directional Ground Relay, Differential Relay |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1007 Electric power systems control T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2861 Electric relays. Protective relays--Security measures. |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Muhamad Sigit Nurcahyo |
| Date Deposited: | 22 Feb 2023 02:17 |
| Last Modified: | 22 Feb 2023 02:17 |
| URI: | http://repository.its.ac.id/id/eprint/63538 |
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