Analisis Kestabilan Transient dan Mekanisme Pelepasan Beban pada PT. Petrokimia Akibat Penambahan Daya dari PLN

Shyfa, Aliya Salsabila (2024) Analisis Kestabilan Transient dan Mekanisme Pelepasan Beban pada PT. Petrokimia Akibat Penambahan Daya dari PLN. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT. Petrokimia Gresik telah memutuskan untuk menambah langganan pasokan listrik dari PLN hingga 30 MVA guna mengurangi kebutuhan membangun dan mengoperasikan pembangkit mandiri tambahan. Akibatnya, jumlah pembangkit mandiri berkurang dari tujuh menjadi empat, yaitu TG-65 dan TG-66 di pabrik 3A dengan total kapasitas 20 MW, GGCP di Pabrik Amurea 2 dengan kapasitas 26,8 MW, dan GTG di Pabrik 1 dengan kapasitas 33 MW.Tugas akhir ini membahas mengenai analisis stabilitas transien melalui simulasi yang
mencakup skenario gangguan seperti generator outage, PLN trip, dan short circuit , serta penerapan skema pelepasan beban berbasis status dan Under Frequency Relay (UFR) sesuai standar IEEE sebagai cadangan. Hasil simulasi menunjukkan bahwa pelepasan satu generator memerlukan pelepasan beban untuk mengembalikan stabilitas sistem, yang ditentukan berdasarkan kapasitas maksimal yang disuplai oleh PLN. Kasus trip PLN menyebabkan pemadaman pada sistem, sehingga diperlukan pelepasan beban besar untuk memulihkan stabilitas. Mekanisme pelepasan beban berbasis status terbukti lebih efektif dalam mengembalikan stabilitas sistem dibandingkan dengan skema standar IEEE. Dalam kasus hubung singkat pada bus, tegangan sistem turun hingga kondisi terendah, sehingga diperlukan isolasi gangguan melalui pembukaan circuit breaker pada sumber gangguan. Penelitian ini memberikan wawasan mengenai efektivitas skema pelepasan beban dalam menjaga stabilitas sistem kelistrikan di PT. Petrokimia Gresik.
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PT. Petrokimia Gresik has decided to increase its electricity supply subscription from PLN to 30 MVA to reduce the need to build and operate additional self-sufficient power plants. Consequently, the number of self-sufficient power plants has decreased from seven to four, namely TG-65 and TG-66 at Plant 3A with a total capacity of 20 MW, GGCP at Amurea 2 Plant with a capacity of 26.8 MW, and GTG at Plant 1 with a capacity of 33 MW. This thesis discusses the analysis of transient stability through simulations that include disturbance scenarios such as generator outages, PLN trips, and short circuits, as well as the implementation of load shedding schemes based on status and Under Frequency Relay (UFR) according to IEEE standards as a backup. The simulation results indicate that shedding one generator requires load shedding to restore system stability, which is determined based on the maximum capacity supplied by PLN. A PLN trip case causes a system-wide blackout, necessitating significant load shedding to restore stability. The status-based load shedding mechanism proves to be more effective in restoring system stability compared to the IEEE standard scheme. In the case of a short circuit on the bus, the system voltage drops to its lowest condition, necessitating fault isolation by opening the circuit breaker at the fault source. This research provides insights into the effectiveness of load shedding schemes in maintaining the stability of the electrical system at PT. Petrokimia Gresik.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Transient Stability, Load Shedding, Frequency, Disturbance,Kestabilan Transien, Pelepasan Beban, Frekuensi, Gangguan
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1010 Electric power system stability. Electric filters, Passive.
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Aliya Salsabila Shyfa
Date Deposited:	29 Jul 2024 08:47
Last Modified:	29 Jul 2024 08:47
URI:	http://repository.its.ac.id/id/eprint/109354

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