Studi Koordinasi Proteksi Dan Kestabilan Transien Sistem Kelistrikan PT. Linde Indonesia Gresik Akibat Penambahan Generator 1x10 Mw Menggunakan Metode Under Frequency Load Shedding

Rahman, Arief (2015) Studi Koordinasi Proteksi Dan Kestabilan Transien Sistem Kelistrikan PT. Linde Indonesia Gresik Akibat Penambahan Generator 1x10 Mw Menggunakan Metode Under Frequency Load Shedding. Undergraduate thesis, Institut Technology Sepuluh Nopember.

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Abstract

Dalam upaya melayani kegiatan operasionalnya, PT. Linde Indonesia Gresik akan mengoperasikan 1 unit generator baru berkapasitas 10 MW. Permasalahan pada sistem kelistrikan saat sumber daya listrik dari PLN terputus menyebabkan perpindahan daya sebesar 21 MW dari pembangkit yang ada dikarenakan harus menanggung beban yang sebelumnya disuplai oleh PLN sehingga perlu dilakukan analisis kestabilan transien dan koordinasi proteksi pada PT. Linde Indonesia Gresik yang tepat dalam mendeteksi dan mengisolir gangguan. Pada tugas akhir ini juga dilakukan pemodelan skema load shedding ketika terjadi gangguan generator outage, lepasnya sumber PLN, dan beban lepas sehingga sistem tetap stabil setelah terjadi gangguan. Analisis kestabilan transien juga diperlukan untuk penyetelan rele reverse power (32P dan 32Q), rele underfrequency (81u), dan rele undervoltage (27u) serta untuk mengetahui respon kestabilan sistem saat rele – rele tersebut bekerja. Dari analisis empat tipikal koordinasi diketahui beberapa kesalahan koordinasi setelan pick up dan time delay yang salah satunya berakibat rele-rele bekerja secara bersamaan. Saat satu generator dengan kapasitas terbesar lepas dari sistem maka diperlukan mekanisme pelepasan beban tahap pertama, sedangkan saat sumber PLN terlepas perlu ditambahkan rele underfrequency dan undervoltage pada bus BOC-PLN-2 serta rele reverse power pada 11kV Bus 3 untuk mengembalikan kestabilan sistem. ========================================================================================================= In an effort to serve its operations, PT. Linde Indonesia Gresik will operate a new 1x10 MW generator. The problem is when PLN power source is disconnected caused the displacement of 21 MW power from existing generators to bear the PLN load. So, it’s necessary to do transient stability analysis and protection coordination on PT. Linde Indonesia Gresik to detect and isolate disturbances. In this final project is also done the modeling of load shedding scheme when generator outage, loss of PLN source, and load off so the system remains stable after disturbances. Transient stability analysis is also required for tuning reverse power relay (32P and 32Q), underfrequency relay (81u), undervoltage relay (27u), and investigating the stability of the system response due to relay works. From the analysis of four coordination typical, there are some errors of pick up and time delay coordination setting that caused relays will trip simultaneously. When the biggest capacity generator was tripped it’s necessary to do the first load shedding mechanism, whereas when the PLN source was tripped it’s necessary to install underfrequency relay and undervoltage relay on BOC-PLN-2 bus along with reverse power relay on 11kV Bus 3 to stabilize system.

Item Type: Thesis (Undergraduate)
Additional Information: RSE 621.312 Rah s
Uncontrolled Keywords: koordinasi proteksi, kestabilan transien, pelepasan beban.
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: 04 Jan 2019 08:14
Last Modified: 04 Jan 2019 08:14
URI: http://repository.its.ac.id/id/eprint/60137

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