Studi Analisis Kestabilan Transien di Sistem Jawa-Madura-Bali 500 kV Akibat Penambahan PLTU Suralaya Unit 9-10 dengan Kapasitas 2×1000 MW

Suprayetno, Suprayetno (2024) Studi Analisis Kestabilan Transien di Sistem Jawa-Madura-Bali 500 kV Akibat Penambahan PLTU Suralaya Unit 9-10 dengan Kapasitas 2×1000 MW. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5022201258-Undergraduate_Thesis.pdf - Accepted Version Download (5MB)

Abstract

Pertumbuhan penduduk, perindustrian, dan ekonomi menyebabkan kebutuhan daya listrik bertambah. Menurut data statistik PT PLN Tahun 2022, rata – rata persentase kenaikan jumlah pelanggan per kelompok pelanggan dari tahun 2014 hingga tahun 2022 sebesar 5,27%. Untuk mengatasi hal tersebut, PT PLN (Persero) melakukan pembangunan pembangkit baru. Salah satu pembangkit yang saat ini masih dalam masa konstruksi yaitu PLTU Suralaya unit 9 dan 10 dengan kapasitas pembangkitan 2x1000 MW yang akan ditargetkan Commercial Operation Date masing – masing pada tahun 2025 dan 2026. Akibat adanya penambahan pembangkit baru di sistem kelistrikan Jawa Madura Bali, perlu dilakukan studi kestabilan transien untuk mengetahui keandalan sistem saat terjadi gangguan. Pada tugas akhir ini terdapat 4 studi kasus gangguan yaitu lepas pembangkit, lepas satu saluran dari saluran ganda, lepas saluran ganda, dan hubung singkat 3 fasa. Studi kasus lepas pembangkit menunjukkan bahwa nadir frekuensi setelah penambahan PLTU Suralaya 9&10 lebih kecil. Selain itu juga memberikan dampak positif dengan mengurangi osilasi dan mempercepat redaman osilasi menuju keadaan stabil. Pada studi kasus lepas satu saluran dari saluran ganda, sistem tetap stabil karena masih ada satu saluran yang dapat mentransmisikan daya. Respon tegangan bus pada studi kasus lepas saluran ganda menunjukkan osilasi yang lebih baik setelah penambahan PLTU Suralaya 9&10, dengan penurunan tegangan dan stabil di range ±5%. Namun, lepas saluran ganda (saluran Suralaya – Balaraja) menyebabkan overload pada saluran Bojonegara – Balaraja sebesar 135,8%, sehingga diperlukan penambahan saluran baru dari Banten – Balaraja untuk mengatasi overload tersebut. Pada studi kasus hubung singkat 3 fasa pada saluran Gandul – Depok, diperoleh nilai critical clearing time yang lebih baik setelah penambahan PLTU Suralaya 9&10, yaitu 187 ms dibandingkan dengan 176 ms sebelum penambahan. Berdasarkan hasil simulasi stabilitas transien dengan mempertimbangkan respon sudut rotor, frekuensi, dan tegangan, diperoleh hasil bahwa setelah penambahan PLTU Suralaya 9&10 sistem masih stabil untuk semua studi kasus gangguan yang dilakukan.
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Population growth, industrialization, and economic development have led to an increased demand for electricity. According to PLN's 2022 statistics, the average annual increase in the number of customers across all customer groups from 2014 to 2022 was 5.27%. To address this demand, PT. PLN (Persero) is constructing new power plants. One of the power plants currently under construction is the Suralaya power plant, which consists of units 9 and 10 with a total generation capacity of 2x1000 MW. These units are targeted for Commercial Operation Date in 2025 and 2026, respectively. Due to the addition of new power plants to the Java Madura Bali electrical system, a transient stability study is necessary to assess the system's reliability during disturbances. This final project includes four disturbance case studies: generator disconnection, single line disconnection from a double circuit, double line disconnection, and three-phase short circuits. The generator disconnection case study shows that the nadir frequency is smaller after the addition of Suralaya Units 9 and 10. Additionally, the addition of these units has a positive impact by reducing oscillations and accelerating the damping of oscillations to a stable state. In the single line disconnection from a double circuit case study, the system remains stable because there is still one line capable of transmitting power. The bus voltage response in the double line disconnection case study shows improved oscillations after the addition of Suralaya Units 9 and 10, with voltage drops remaining stable within the ±5% range. However, double line disconnection (Suralaya – Balaraja) causes an overload on the Bojonegara – Balaraja line by 135.8%, necessitating the addition of a new line from Banten – Balaraja to address the overload. In the three-phase short circuit case study on the Gandul – Depok line, the critical clearing time (CCT) is better after the addition of Suralaya Units 9 and 10, at 187 ms compared to 176 ms before the addition. Based on the transient stability simulation results considering rotor angle response, frequency, and voltage, the system remains stable for all disturbance case studies conducted after the addition of Suralaya Units 9 and 10.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kestabilan Transien, Lepas Pembangkit, Lepas Saluran, Hubung Singkat 3 Fasa, Critical Clearing Time, Transient Stability, Generator Trip, Line Trip, Three-Phase Short Circuit, Critical Clearing Time.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1010 Electric power system stability. Electric filters, Passive. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3226 Transients (Electricity). Electric power systems. Harmonics (Electric waves).
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Suprayetno Suprayetno
Date Deposited:	31 Jul 2024 01:01
Last Modified:	31 Jul 2024 01:01
URI:	http://repository.its.ac.id/id/eprint/109923

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