Studi Koordinasi Proteksi Arus Lebih Akibat Pemasangan Sisfcl (Saturated Iron-Core Superconducting Fault Current Limiter) Di Pabrik III Pt. Petrokimia Gresik

Nugroho, Deny Cahyo (2015) Studi Koordinasi Proteksi Arus Lebih Akibat Pemasangan Sisfcl (Saturated Iron-Core Superconducting Fault Current Limiter) Di Pabrik III Pt. Petrokimia Gresik. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Meningkatnya pasokan kebutuhan daya listrik di PT. Petrokimia Gresik sehingga dilakukan pemasangan generator baru atau melakukan interkoneksi generator untuk menjaga kontinuitas pelayanan daya listrik. Akibat adanya interkoneksi generator maka arus hubung singkat akan semakin besar pada titik gangguan. Hal ini dapat melampaui device capability peralatan sehingga dapat merusak peralatan listrik yang berada di dekat titik gangguan. Arus gangguan hubung singkat pada switchgear utama di pabrik III HVS 65 melebihi device capability, dimana rating switchgear 100 kA peak, sedangkan arus hubung singkat 3 fasa ½ cycle sebesar 123.5 kA peak. Oleh sebab itu untuk membatasi arus gangguan hubung singkat tersebut digunakan suatu Saturated Ironcore Superconducting Fault Current Limiter (SISFCL). SISFCL ini dipasang pada transformator IBT01 yang merupakan sumber arus kontribusi terbesar ketika terjadi gangguan hubung singkat 3 fasa ½ cycle pada switchgear HVS 65. Pemasangan SISFCL dapat mengurangi besarnya arus hubung singkat pada HVS 65 dari 123.5 kA menjadi 98 kA peak. Pemasangan SISFCL menunjukkan arus hubung singkat semakin berkurang sehingga mengakibatkan terjadinya perubahan koordinasi proteksi rele arus lebih pada pabrik III. Studi koordinasi dilakukan untuk mengetahui apakah sistem pengaman bekerja dengan baik. Hasil analisa hubung singkat serta studi koordinasi proteksi akan ditampilkan dalam bentuk kurva time current characteristic (TCC). ============================================================================================ Increase demand of electric power at PT. Petrokimia Gresik so need the installation of new generator or interconnection generator to maintain the continuity of the electric power service. Due to the interconnection of the generator short circuit current will be greater at the point of interruption. It can exceed the device capability of equipment so can damage electrical equipment near the point of the interruption. Short circuit fault current at the main switchgear on plant III HVS 65 exceed device capability, maximum value of switchgear is 100 kA, while the ½ cycle short circuit 3 phasa current of 123.5 kA. Therefore to limit the short circuit current is used Saturated Iron-core Superconducting Fault Current Limiter (SISFCL). SISFCL will be installed in the transformator IBT01 which is the current source of the greatest contribution in the event of ½ cycle short circuit 3 phasa in the switchgear HVS 65. Installation of SISFCL can reduce the amount of short circuit current on the switchgear HVS 65 of 123.5 kA to 98 kA peak. Installation of SISFCL shows decreasing of short circuit current, so causes changes the overcurrent protection coordination on plant III. Study overcurrent protection coordination is used to determine if security system works well. the result of short circuit analysis and study overcurrent protection coordination will appear in time current curve characteristic (TCC).

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Arus Hubung Singkat, SISFCL, Koordinasi Proteksi, Rele Arus Lebih, Kurva Time Current Characteristic (TCC) =========================================================================================== Short Circuit Current, SISFCL, Overcurrent Protection Coordination, Time Current Curve Characteristic (TCC)
Subjects: Q Science > QC Physics > QC610.3 Electric conductivity
Divisions: Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User: - Taufiq Rahmanu
Date Deposited: 29 Mar 2019 06:54
Last Modified: 29 Mar 2019 06:54
URI: https://repository.its.ac.id/id/eprint/62643

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