Studi Kestabilan Sistem Interkoneksi 275 KV Sumatera Pasca Gangguan Satu dan Tiga Fasa Menggunakan Penutup Balik Otomatis

Himawan, Ikhlasul Reza (2021) Studi Kestabilan Sistem Interkoneksi 275 KV Sumatera Pasca Gangguan Satu dan Tiga Fasa Menggunakan Penutup Balik Otomatis. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pada Sistem Interkoneksi Sumatera terdapat 16 saluran ganda bertegangan nominal 275 kV yang tersebar di 3 bagian di pulau Sumatera. Studi kestabilan terkait peran Penutup Balik Otomatis atau PBO pasca terjadinya gangguan dilakukan agar mengetahui kondisi operasi sistem yang sebenarnya, salah satunya yakni menentukan batasan lamanya durasi pengamanan setelah terjadinya gangguan temporer pada saluran agar menjaga sistem tetap stabil. Dengan menggunakan satu skenario beban puncak yang memiliki total daya pembangkitan sistem sebesar 5632 MVA sebagai kondisi awal, kemudian disimulasikan analisis kestabilan transien dengan skenario pelepasan dan penutupan pada saluran yang terjadi kegagalan temporer menggunakan PBO. Masing-masing saluran dilakukan simulasi menggunakan dua mekanisme, yakni PBO Satu Fasa (SPAR) dan Tiga Fasa (TPAR) menggunakan perhitungan hubung singkat satu dan tiga fasa secara berurutan. Studi kestabilan interkoneksi 275 kV Sumatera menganalisis kestabilan sistem hingga detik ke-30 dengan meninjau respon frekuensi sistem, tegangan, hingga sudut rotor pembangkit. Dengan mempertimbangkan waktu implementasi PBO memiliki rentang durasi 0.3 hingga 5 detik setelah pelepasan saluran akibat gangguan temporer, seluruh saluran wilayah stabil hingga waktu maksimal jika dilakukan penutupan menggunakan SPAR. Pada mekanisme TPAR, waktu aman untuk penutupan adalah kurang dari 0.6 detik setelah PMT terbuka dan beberapa saluran dengan pembangkit terdekat atau tidak memiliki sambungan selain 275 kV harus dilakukan secara instan. Namun pada beberapa saluran lain, mekanisme TPAR dapat dilakukan dengan waktu hingga 5 detik.
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In the Sumatra Interconnected System, there are 16 doublecircuit lines with nominal voltage of 275 kV spread over 3 parts of the
island of Sumatra. Studies related to the role of Auto-Recloser during
post-fault were carried out in order to determine the actual condition of
the system, one of which was to determine the security settings after the
occurrence of temporary faults in the selected line so that it remained
stable. By using one peak load scenario with a total generation power of
5632 MVA within the system at initial condition, we simulated transient
stability simulation with events of opening and reclosing the faulted line
using Auto-Recloser, assuming there have been installed on all lines when
the fault has been cleared. Each set of line was examined under two
different mechanisms, by using Single Phase Auto-Recloser (SPAR) and
Three Phase Auto-Recloser (TPAR) at Single-Phase and Three-Phase
Short Circuit Fault respectively. The study of the stability of the Sumatra
interconnected system analyzes the stability system up to 30 seconds by
reviewing the frequency system, voltage, and rotor angle responses.
Taking into account the SPAR and TPAR implementation mechanism
with duration range of 0.3 seconds to 5 seconds after the fault disappears,
the system is stable until the maximum time when it is closed using SPAR
on each line. On the contrary, by using TPAR mechanism in the system,
the safe time for closing is less than 0.6 seconds after the CB opens and
some lines with nearby generators or have no connection other than 275
kV, the operation has to be done instantly. On several other lines in
Sumatra, TPAR mechanism can be done with up to 5 seconds.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Sistem Interkoneksi, Kestabilan Sistem Tenaga, Penutup Balik Otomatis,Interconnection System, Power System Stability, Auto-Recloser
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:	Ikhlasul Reza Himawan
Date Deposited:	20 Aug 2021 03:10
Last Modified:	20 Aug 2021 03:10
URI:	http://repository.its.ac.id/id/eprint/87816

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