Analisis Kestabilan Transien Dan Koordinasiproteksi Pada PT. Kaltim Methanol Industri Akibat Integrasi Dengan Sistem 11 kV PT. Kaltim Daya Mandiri.

Murtopo, S. Andri (2015) Analisis Kestabilan Transien Dan Koordinasiproteksi Pada PT. Kaltim Methanol Industri Akibat Integrasi Dengan Sistem 11 kV PT. Kaltim Daya Mandiri. Undergraduate thesis, Institut Technology Sepuluh Nopember.

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Abstract

Integrasi PT. Kaltim Methanol Industri dengan PT. Kaltim Daya Mandiri bertujuan untuk menjaga kontinuitas aliran daya pada PT. Kaltim Methanol Industri. Integrasi sistem ini menyebabkan perubahan nilai arus hubung singkat sistem dan penambahan rele. Oleh karena itu diperlukan analisis kestabilan transien dan koordinasi proteksi untuk agar sistem dapat beroperasi normal dan mencegah kerusakan peralatan listrik saat terjadi gangguan. Analisa koordinasi proteksi kondisi eksisting sebelum sistem terintegrasi terdapat kesalahan pada setting Ipickup rele arus lebih dan grading time rele. Oleh kerena itu, untuk memperbaiki kesalahan setting tersebut, pada sistem yang telah diintegrasi dilakukan perhitungan manual berdasarkan standar yang ada. Hasil perhitungan ini menjadi dasar untuk resetting rele arus lebih (OCR) fasa dan ground sehingga sistem yang telah terintegrasi dapat beroperasi dengan normal. Analisa kestabilan transien yang dilakukan meliputi generator outage, short circuit, dan motor starting. Hasil simulasi menunjukan ketika terjadi short circuit pada bus 11 kV, tegangan sistem mengalami penurunan yang begitu cepat dan akhirnya kembali stabil saat circuit breaker didekat gangguan di open. Ketika generator pada PT. Kaltim Daya Mandiri lepas, perlu dilakukan mekanisme load shedding serta pemasangan rele undervoltage dan rele under frekuensi sebagai back up. Selain itu, pelepasan generator akan menyebabkan aliran daya mengalir kembali ke generator sehingga diperlukan pemasangan rele reverse power. ====================================================================================================== The aims of PT. Kaltim Methanol Industri with PT. Kaltim Daya Mandiri integration is to maintain power flow continuity in PT. Kaltim Methanol Industri. This system integration caused the changes of short circuit current and addition of protection relay. Therefore, it’s necessary to analyze transient stability and protection coordination to maintains system to operate normally and prevent damage on electrical equipment when disturbance occured. There are some error in the setting Ipickup relay and gradding time overcurrent relay on protection coordination of existing condition before systems integrated. Therefore, protection coordination of integrated system needs to be calculated manually based on existing standards. The result of this calculation is used as the basic for resetting overcurrent relay (OCR) phase and ground so that the integrated system can operate normally. Transient stability analysis include generator outage, short circuit, and motor starting. The simulation results show if short circuit occurred on bus 11 kV, the voltage of the system experienced a rapid decline but stabilized when circuit breaker near the fault line open. When the generator at PT. Kaltim Daya Mandiri outage, load shedding mechanism and installation of undervoltage and under frequency relay is needed as backup. In addition, the outage geneator caused reverse power flow to generator so it’s required installation of reverse power relays.

Item Type: Thesis (Undergraduate)
Additional Information: RSE 621.319 21 Mur a
Uncontrolled Keywords: koordinasi proteksi, grading time, OCR, kestabilan transien, load shedding.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3226 Transients (Electricity). Electric power systems. Harmonics (Electric waves).
Divisions: Faculty of Electrical Technology > Electrical Engineering > (S1) Undergraduate Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 02 Jan 2019 02:21
Last Modified: 02 Jan 2019 02:21
URI: http://repository.its.ac.id/id/eprint/60123

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