Koordinasi Rele Arus Lebih di PT. Pupuk Sriwidjaja Palembang Menggunakan Grasshopper Optimization Algorithm

Putra, Riko Satrya Fajar Jaelani (2023) Koordinasi Rele Arus Lebih di PT. Pupuk Sriwidjaja Palembang Menggunakan Grasshopper Optimization Algorithm. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ketersediaan listrik harus selalu terjaga agar keberlangsungan produksi dalam industri tetap berjalan. Pada prakteknya, sistem listrik tidak selalu berjalan sesuai apa yang diperkirakan. Sistem kelistrikan dapat timbul suatu gangguan yang akan mengakibatkan kerusakan pada peralatan listrik, termasuk mesin-mesin industri. Oleh karena itu, dibutuhkan suatu koordinasi sistem proteksi untuk mengamankan peralatan listrik. Sistem proteksi yang umum digunakan adalah rele arus lebih. Pengaturan rele arus lebih menggunakan parameter seperti arus pickup, jenis kurva, dan time dial setting (TDS). Pada saat timbul gangguan, rele primer akan bekerja, namun jika gagal beroperasi maka rele backup akan bekerja dengan mematuhi coordination time interval (CTI) minimal 0.2 detik dalam satu rating tegangan atau mendekati 0 dalam rating tegangan yang berbeda dari rele primer. Pada praktik dilapangan, operator sering mengalami kesulitan dalam menentukan pengaturan TDS sehingga operasi rele arus lebih tidak bekerja secara maksimal. Oleh karena itu, dibutukan suatu program yang dapat melalukan pengaturan rele arus lebih dengan cepat dan tepat, sehingga rele arus lebih dapat bekerja semaksimal mungkin. Penelitian ini mengusulkan koordinasi rele proteksi pada sistem kelistrikan PT. Pupuk Sriwidjaja Palembang dengan menggunakan metode Grasshopper Optimization Algorithm (GOA). Menurut hasil simulasi dan analisa yang didapatkan, simulasi GOA mendapatkan hasil koordinasi rele yang baik. Rele paling dekat dengan beban bekerja dalam waktu 0.1 detik. Rele berikutnya bekerja mengikuti CTI dengan benar, yaitu 0.2 detik dalam satu rating tegangan dan mendekati 0 bila berbeda rating tegangan. Kurva TCC yang didapatkan untuk pasangan masing-masing rele menampilkan hasil yang baik. Penggunaan metode GOA untuk koordinasi rele proteksi berjalan dengan baik dan dapat diaplikasikan untuk sistem kelistrikan industri.
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The availability of electricity must always be maintained so that the industry’s production continuity continues. In practice, electrical systems do not always work as expected. The electrical system may experience a disturbance that will result in damage to electrical equipment, including industrial machines. Therefore, a coordinated protection system is needed to secure electrical equipment. The protection system that is commonly used is the overcurrent relay. Overcurrent relay settings use parameters such as pickup current, type of curve, and time dial setting (TDS). In the event of a disturbance, the primary relay will operate, but if it fails to operate, the backup relay will operate in compliance with the coordination time interval (CTI) of at least 0.2 seconds in one voltage rating or close to 0 in a different voltage rating from the primary relay. In field practice, operators often experience difficulties in determining the TDS setting so that the operation of the overcurrent relay does not work optimally. Therefore, we need a program that can adjust the overcurrent relay quickly and precisely, so that the overcurrent relay can work as much as possible. This study proposes the coordination of protection relays in the electrical system of Pupuk Sriwidjaja Palembang factory using the Grasshopper Optimization Algorithm (GOA) method. According to the simulation and analysis results obtained, the GOA simulation obtained good relay coordination results. The closest relay to the load works within 0.1 seconds. The next relay correctly works according to the CTI, which is 0.2 seconds at one voltage rating and close to 0 if it is at a different voltage rating. The TCC curve obtained for each pair of relays shows good results. The use of the GOA method for the coordination of protective relays works well and can be applied to industrial electrical systems.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	overcurrent relay (OCR), time dial setting (TDS), grasshopper optimization algorithm (GOA)
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2861 Electric relays. Protective relays--Security measures.
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20101-(S2) Master Thesis
Depositing User:	Riko Satrya Fajar Jaelani Putra
Date Deposited:	20 Jul 2023 07:38
Last Modified:	20 Jul 2023 07:38
URI:	http://repository.its.ac.id/id/eprint/98728

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