Analisis Pengaruh Uprating Transformator Terhadap Nilai Susut Daya Di PT. PLN ULP Indrapura

Napitupulu, M.A Fernando (2019) Analisis Pengaruh Uprating Transformator Terhadap Nilai Susut Daya Di PT. PLN ULP Indrapura. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sepanjang tahun 2018, PT PLN ULP Indrapura telah melakukan penggantian transformator pada gardu distribusi sebanyak 88 buah, 44 diantarannya dilakukan peningkatan kapasitas daya (uprating) transformator. Uprating transformator pada dasarnya dilakukan untuk mencegah terjadinya overload, sehingga gangguan pada sistem distribusi dapat dihindari dan susut daya pada transformator dapat dikurangi. Namun jika uprating transformator dilakukan tanpa perhitungan dan perencanaan yang tepat, justru dapat meningkatkan susut daya transformator pada gardu distribusi. Uprating transfomator yang telah dilakukan di PT PLN ULP Indrapura perlu dikaji kembali untuk mengetahui perubahan susut yang yang disebabkan oleh uprating transformator pada gardu distribusi. Pada tugas akhir ini akan dilakukan penelitian mengenai aplikasi perhitungan susut transformator pada gardu distribusi AA 233, AA 235, AA 249 dan AA 449. Perhitungan susut daya dilakukan dengan metode Energi Load Flow, Loss Factor Analysis dan simulasi Load Flow pada Digsilent Power Factory 15.1. Dengan menggunakan metode tersebut dapat diperoleh susut daya sebelum dan setelah dilakukan uprating transformator. Susut transformator tersebut selanjutnya digunakan untuk mengestimasi kapasitas daya transformator yang tepat pada gardu distribusi. Hasil perhitungan susut transformator dengan ketiga metode yang telah dilakukan menunjukkan bahwa terjadi peningkatan susut daya setelah dilakukan uprating transformator. Semakin rendah beban setelah uprating transformator, semakin besar peningkatan susut daya yang terjadi. Kondisi underload pada tranformator dapat dihindari dengan menurunkan kapasitas daya transformator. Hasil estimasi kapasitas transformator menunjukkan dengan menurunkan kapasitas transformator pada masing-masing gardu distribusi, dapat menurunkan susut daya. Dari hasil penelitian ini dapat disimpulkan bahwa uprating transformator yang terlalu besar pada gardu distribusi dapat meningkatkan susut daya.
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Throughout 2018, PT PLN ULP Indrapura has replaced the transformer at 88 distribution substations, 44 of which are carried out by upgrading the transformer capacity. Uprating transformers are basically done to prevent overload, so that interference with the distribution system can be avoided and the power losses in the transformer can be reduced. But if the uprating transformer is done without proper calculation and planning, it can actually increase the transformer power losses in the distribution substation. Uprating the transfomator that has been carried out at PT PLN ULP Indrapura needs to be reviewed to find out the changes in power losses caused by uprating the transformer at the distribution substation. In this final assignment, a study will be conducted on the application of transformer power losses calculation at AA 233, AA 235, AA 249 and AA 449 distribution substations. Calculation of power losses is done by the method of Energy Load Flow, Loss Factor Analysis and Load Flow simulation on Digsilent Power Factory 15.1. Using this method can be obtained before and after uprating the transformer. The transformer power shrinkage is then used to estimate the transformer power capacity that is right at the distribution substation. The calculation results of transformer power losses with the three methods that have been carried out show that there is an increase in power losses after uprating the transformer. The lower the load after uprating the transformer, the greater the increase in power losses that occur. Underload conditions on the transformer can be avoided by reducing the transformer power capacity. The results of the transformer capacity estimation show that by reducing the transformer capacity at each distribution substation, it can reduce power losses. From the results of this study it can be concluded that uprating transformers that are too large in the distribution substations can increase power losses.

Item Type:	Thesis (Other)
Additional Information:	RSE 621.314 Nap a-1 2019
Uncontrolled Keywords:	Uprating, Perhitungan susut, Kapasitas Daya, Calculation of Power Loss, Power Capacity
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2551 Electric transformers.
Divisions:	Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	M.A. Fernando Napitupulu
Date Deposited:	07 Mar 2023 02:50
Last Modified:	07 Mar 2023 02:50
URI:	http://repository.its.ac.id/id/eprint/63615

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