Gunawan, Yosep (2022) Studi Koordinasi Proteksi Arus Lebih dan Mitigasi Variasi Tegangan Sesaat Pada Sistem Kelistrikan PT. Aneka Gas Industri Bringin Bendo. Other thesis, Institut Teknologi Sepuluh Nopember.
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Text (Thesis Article)
07111840000072-Undergraduate_Thesis-Article.pdf - Accepted Version Restricted to Repository staff only until 1 April 2025. Download (2MB) | Request a copy |
Abstract
Berdasarkan kebutuhan gas oksigen untuk para pasien covid-19 yang melonjak pada tahun 2020-2021, maka pabrik produsen gas PT. Aneka Gas Industri Bringin Bendo dituntut untuk meningkatkan keandalan, keamanan, dan kualitas daya sistem kelistrikannya. Beberapa kasus blackout pada pabrik terjadi karena heavy fault pada motor kapasitas besar yang dimana ada interlock dengan seluruh plant, sehingga gangguan pun mempengaruhi seluruh sistem kelistrikan. Gangguan tersebut disebabkan oleh kualitas daya listrik, yaitu variasi tegangan sesaat (momentary voltage variation) berupa tegangan kedip (voltage sag) dan tegangan lonjak (voltage swell) yang mengakibatkan kegagalan pada peralatan listrik yang sensitif terhadap perubahan tegangan. Tugas akhir ini mengusulkan setting koordinasi overcurrent relay (OCR) dan ground fault relay (GFR), serta pemasangan dynamic voltage restorer (DVR) sebagai mitigasi voltage sag/swell. Setting dan simulasi koordinasi rele proteksi dilakukan dengan menggunakan software ETAP 19.0.1. Setting OCR dan GFR dilakukan dengan berbasis pada IEEE std. 242-2001. Kemudian dilakukan analisis pada kurva TCC dan urutan tripping rele akibat gangguan untuk memastikan ketepatan setting koordinasi relay proteksi yang diusulkan. Sedangkan pemodelan dan simulasi DVR sebagai mitigasi kompensasi voltage sag/swell dilakukan dengan menggunakan software MATLAB/Simulink. Simulasi voltage sag dilakukan dengan mengatur tingkat voltage sag pada programmable power source, untuk menghasilkan tiga tingkat sag yang berbeda, yaitu 0,1 per unit (pu); 0,5 pu; dan 0,9 pu. Sedangkan simulasi voltage swell dilakukan serupa dengan tiga tingkat swell yang berbeda, yaitu 1,1 pu; 1,5 pu; dan 1,8 pu. Durasi waktu gangguan antara 0,08-0,12 detik, dengan durasi waktu simulasi 0,2 detik. Respon sistem pada tegangan beban dianalisis dan dievaluasi pada kasus tanpa dan dengan menggunakan DVR, untuk memastikan keberhasilan dan efektifitas model DVR yang diusulkan. Didapatkan bahwa, hasil koordinasi OCR dan GFR sudah terkoordinasi dengan tepat dan time grading sudah memenuhi IEEE std. 242-2001. Sedangkan pada hasil simulasi DVR, didapatkan bahwa tegangan beban yang mengalami voltage sag/swell dapat dikompensasi dengan baik secara otomatis dan real-time pada semua kasus tingkat sag/swell.
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Based on the need for oxygen gas for COVID-19 patients, which increased significantly in 2020-2021, the gas producing factory PT. Aneka Gas Industri Bringin Bendo are required to improve the reliability, safety, and power quality of the electrical system. Several blackout cases at the factory occurred due to false tripping of the protection relay due to interference. The disturbance is caused by the power quality, which is momentary voltage variation in the form of voltage sag and voltage swell which results in failure of electrical equipment that is sensitive to changes in voltage. This final project proposes setting coordination of overcurrent relay (OCR) and ground fault relay (GFR), and installation of dynamic voltage restorer (DVR) as a mitigation of voltage sag/swell. Setting and simulation of protection relay coordination is done using ETAP 19.0.1 software. Setting OCR and GFR is based on IEEE std. 242-2001. Then an analysis of the TCC curve and the relay tripping sequence due to disturbance is conducted to ensure the accuracy of the proposed protection relay coordination settings. Meanwhile, DVR modeling and simulation as a voltage sag/swell compensation mitigation was conducted using MATLAB/Simulink software. Voltage sag simulation is done by adjusting the voltage sag level on the programmable power source, to produce three different sag levels, which is 0.1 per unit (pu); 0.5 pu; and 0.9 pu. Meanwhile, the voltage swell simulation was conducted in the same way with three different swell levels, which is 1.1 pu; 1.5 pu; and 1.8 pu. The duration of the disturbance is between 0.08-0.12 seconds, with a simulation time of 0.2 seconds. Response of the system on the load voltage is analyzed and evaluated in the case of without and using a DVR, to ensure the success and effectiveness of the proposed DVR model. It was found that, the results of the coordination of the OCR and the GFR were properly coordinated, and the time grading had complied with the IEEE std. 242-2001. Meanwhile, in the DVR simulation result, it is found that the load voltage experiencing voltage sag/swell can be compensated automatically and in real-time in all cases of sag/swell level.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Momentary Voltage Variation, Voltage Sag/Swell, Overcurrent Relay, Ground Fault Relay, Dynamic Voltage Restorer. |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1007 Electric power systems control T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2851 Voltage regulators. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2861 Electric relays. Protective relays--Security measures. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3070 Automatic control |
| Divisions: | Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Yosep Gunawan |
| Date Deposited: | 13 Feb 2023 01:34 |
| Last Modified: | 13 Feb 2023 01:35 |
| URI: | http://repository.its.ac.id/id/eprint/97021 |
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