Penentuan Kelayakan Tahanan Isolasi Pada Transformator 60 MVA Di Gardu Induk 150 kV Tegal Dengan Menggunakan Indeks Polarisasi, Tangen Delta, Dan Breakdown Voltage
DOI:
https://doi.org/10.26623/elektrika.v12i2.2721Keywords:
power transformer, substation, isolation resistance.Abstract
A power transformer is electrical power equipment that works to transmit power or electrical power from high voltage to low voltage or on the contrary. In the operation of distributing electricity, the transformer can be said to be the heart of transmission and distribution. In this condition, a transformer is expected to operate optimally according to its function.. If the isolation state of the transformer deteriorates, it can have an impact on operating failure and the most fatal of which is that the transformer is damaged which can cause disturbances in the electrical system. To overcome this, it is necessary to analyze the isolation resistance.
This study analyzes the isolation resistance on a transformer using the polarization index, tangent delta and oil breakdown voltage methods to determine the quality of the isolation on the transformer. This study took data at the 150 Kv substation Tegal. The data used include polarization index test data, tangent delta data, bottom oil breakdown voltage test data, and OLTC oil. After the data is obtained, then calculations and analyzes are carried out to obtain accurate results.
The test results at the 150 Kv substation Tegal showed the polarization index value with the lowest IP of 1.26 in the primary-ground section and the highest IP of 1.97 in the primary-secondary section is still in good condition. The results of the tangent delta test are still in good condition, only in the CHT mode experienced a negative delta tan deterioration of 0.07%. The result of the average oil test is still suitable for use with 69.9 Kv of bottom oil and 53.3 Kv of OLTC oil.
Downloads
References
F. Nanda, Peningkatan Kualitas dan Karakterisasi Transformator Step up Satu Fasa 250 VA , 10 kV , 50 Hz, 2018.
M. Fajar, Analisis Kondisi Hasil Pengujian Transformator III 150/20kV 16MVA GI Jajar Dalam Keadaan padam, J. Linguist., vol. 3, no. 2, pp. 139 157, 2018.
Muhammad syahendra Anindyantoro, Analisa tahanan isolasi pada transformator tenaga di gardu induk wonogiri, 2017.
Tomy Adi Saputro, Analisis hasil pengujian tahanan isolasi transformator daya. .
Dwi Ari Wibowo, Analisa pengujian isolasi transformator daya 60 MVA Pada gardu induk jajar,
I. Std, I. Power, E. Society, and I. S. Board, IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery IEEE Power and Energy Society, vol. 2000, pp. 9 14, 2013.
Baddarudin, Analisa minyak transformator pada transformator 3 fasa di PT SASINDO, vol. 6, no. 2, p. 103, 2018.
Pengujian tangen delta trafo dan bushing kasus-khusus tangen delta negatif oleh Arief Setyowibowo. .
P. Persero, Pengukuran data teknik, p. 380366, 2010.
Downloads
Published
Issue
Section
License
Authors who publish this journal agree to the following terms:
The author owns the copyright and grants the journal the first publication rights with the work simultaneously licensed under the Creative Commons Attribution 4.0 International License which allows others to share the work with recognition of the authorship of the work and initial publication in the journal.
Authors may enter into separate additional contractual agreements for non-exclusive distribution of the published journal version of the work (e.g., posting it to an institutional repository or publishing it in a book), in recognition of its initial publication in this journal.
Authors are allowed and encouraged to post their work online (e.g., in institutional repositories or on their websites) before and during the submission process, as it can lead to productive exchanges, as well as earlier and larger citations of published works (See The Effects of Open Access).
This work is licensed under the Creative Commons Attribution 4.0 International License.
