Simulasi Dan Analisis Stabilitas Transien Dan Pelepasan Beban Pada Sistem Kelistrikan PT Semen Indonesia Pabrik Aceh

Firdaus, David (2016) Simulasi Dan Analisis Stabilitas Transien Dan Pelepasan Beban Pada Sistem Kelistrikan PT Semen Indonesia Pabrik Aceh. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT. Semen Indonesia adalah perusahaan BUMN penghasil semen terbesar dimana akan melakukan perencanaan pembangunan pabrik Semen Aceh. Dalam perencanaannya, sistem kelistrikan pada pabrik Semen Aceh akan menggunakan dua sumber yakni PLN pada sistem kelistrikan alternatif 1 dan Generator 30 MW dan Generator 2x25 MW pada sistem kelistrikan alternatif 2 sehingga perlu dilakukan studi stabilitas transien untuk mengetahui kestabilan sistem saat terjadi gangguan transien. Pada tugas akhir ini difokuskan pada analisis kestabilan transien meliputi kestabilan tegangan, kestabilan frekuensi dan kestabilan sudut rotor saat terjadi generator outage, motor starting dan gangguan hubung singkat. Dari hasil simulasi sistem kelistrikan alternatif 2, menunjukkan bahwa pada kasus lepasnya generator mengakibatkan frekuensi sistem tidak stabil. Untuk mengembalikan kestabilan sistem, pada kasus lepasnya generator (841BG02) memerlukan pelepasan beban 2 tahap dengan melepas 25.02% dari total beban (9,97 MW). Saat kasus hubung singkat pada level tegangan 0,4 kV tidak terlalu berpengaruh pada kestabilan meskipun mengakibatkan tegangan turun sesaat dan dapat kembali pada keadaan semula. Selain itu pada kasus hubung singkat dilevel tegangan 6,3 kV, setiap nilai level tegangan akan turun setelah terjadi gangguan hubung singkat 3 fasa pada level tegangan 6,3 kV, namun setelah CB5-831MV081 open maka nilai tegangan sesaat menjadi 108,359% dan akan kembali steady state pada 97,09%. Pada kasus motor starting, penurunan tegangan terendah sempat mencapai titik terendah pada 65,79% dan stabil pada 91,456%. ======================================================================================================================== PT. Indonesia Cement is the largest cement producer stateowned company which will carry out the development planning cement factory in Aceh. In planning, the electrical system in Aceh cement plant will use two sources is PLN on the electrical system of alternative 1 and Generators 30 MW and 2x25 MW Generator on the electrical system of alternative 2 so that the transient stability studies need to be done to determine the stability of the system during a transient interruption. In this thesis focused on the transient stability analysis includes voltage stability, frequency stability and the stability of the generator rotor angle during an outage, the motor starting and short circuit. From the simulation results of alternative electrical system 2, showed that in case of the loss resulting frequency generator system is unstable. To restore the stability of the system, in case of loss of the generator (841BG02) requires two stages of load shedding by removing 25.02 % of the total load (9.97 MW). When the case of short circuit at a voltage level of 0.4 kV was not affecting the stability although the resulting voltage drops momentarily and may return to its original state. Also in the case of a short circuit at the level of the voltage of 6.3 kV, each rated voltage level will drop after three -phase short circuit at a voltage level of 6.3 kV, but after CB5-831MV081 open the instantenous voltage value of 108.359 % and will be back steady state at 97.09 %. In the case of starting motors , low voltage drop had reached its lowest point at 65.79 % and steady at 91.456 %

Item Type: Thesis (Undergraduate)
Additional Information: RSE 621.319 21 Fir s
Uncontrolled Keywords: kestabilan transien, gangguan transien, pelepasan beban.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3226 Transients (Electricity). Electric power systems. Harmonics (Electric waves).
Divisions: Faculty of Industrial Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User: ansi aflacha
Date Deposited: 24 Feb 2020 08:00
Last Modified: 24 Feb 2020 08:00
URI: https://repository.its.ac.id/id/eprint/75143

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