Stephani, Ribka (2015) Implementasi Transformator Penggeser Fasa Pada Sistem Distribusi Radial Tiga Fasa Untuk Menurunkan Total Harmonic Distortion (Thd). Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Beban listrik non-linier merupakan penyebab arus harmonisa pada sistem
kelistrikan yang berpengaruh pada kualitas daya listrik dan kerusakan peralatan.
Oleh karena itu, diperlukan perhitungan aliran daya harmonisa untuk mengetahui
besar dan penyebaran harmonisa pada sistem kelistrikan. Metode analisa aliran
daya harmonisa yang digunakan pada sistem distribusi radial tiga fasa pada
penelitian ini adalah backward-forward sweep. Metode tersebut dikembangkan
dengan mempertimbangkan transformator pada proses analisis aliran daya
harmonisa. Hasil simulasi menunjukkan bahwa metode ini cukup handal dalam
menghitung Total Harmonic Distortion (THD) tegangan karena memiliki error
sebesar 2,44% untuk empat orde hamonisa dan 3,0% untuk enam orde harmonisa
dibandingkan dengan software ETAP.
Penelitian ini mengembangkan pula model transformator penggeser fasa
berupa rangkaian zig-zag. Model transformator ini dapat digunakan untuk
menyalurkan daya listrik pada sistem distribusi radial tiga fasa sekaligus mampu
mereduksi harmonisa yang terjadi pada sistem. Transformator penggeser fasa
adalah sebuah trafo tiga fasa multi winding yang gelombang arus dari kumparan
output satu dengan yang lain berbeda fasa. Perbedaan fasa inilah yang akan
mereduksi harmonisa sehingga Total Harmonic Distortion (THD) arus yang
timbul pada sistem seminimal mungkin. Hasil simulasi menunjukkan Total
Harmonic Distortion (THD) arus pada sisi primer transformator dengan beban
sama besar dimasing-masing output, rata-rata pada fasa R, S, dan T turun sebesar
90,97% dan tegangan 99%. Total Harmonic Distortion (THD) arus pada sisi
primer transformator dengan beban tidak sama besar dimasing-masing output,
rata-rata pada fasa R, S, dan T turun sebesar 58,435%, 61,212% dan 58,987 dan
tegangan 99%.
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Non-linear loads cause high harmonics current on radial distribution
system. Harmonics in power systems affects the power quality, electricity
distribution and damages the equipment. Therefore, an analysis about harmonic
frequency was considered necessarily to be conducted in order to determine the
transmission and total harmonic distortion in system. Backward-foward sweep
methods were applied in radial three phase distribution system. By considering the
harmonic and transformer, the result of power flow analysis would be more
accurate. The simulation result showed that Total Harmonic Distortion (THD)
Voltage had 2.44% errors in four harmonic ordes and 3.0% errors in six harmonic
ordes compared to ETAP software.
The phase-shifted transformer with zig-zag connection was also used in
this research. This transformer model was used to run the electrical power in
radial 3 phase distribution system and was able to reduce harmonics in
distribution system without using any additional equipments. Phase-shifted
transformer was a three-phases multi-winding transformer in which the current
wave of each windings output had different phase. The different phases could
reduce Total Harmonic Distortion (THD) current in distribution system. The
simulation showed that, when each output of transformator was in the same
amount, Total Harmonic Distortion (THD) current in primary side of transformer
could be reduced to 90.97% and voltage could be reduced to 99%. When each
output of transformator was not in the same amount, the simulation showed that
Total Harmonic Distortion (THD) current in primary side of transformer in phase
R, S, and T could be reduced to 58.435%, 61.212% and 58.987 and voltage could
be reduced to 99%.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Harmonisa, Transformator Penggeser Fasa, Zig-zag Transformator ===================================================================================================== Harmonics, Phase-shifted Transformer, Zig-zag Transformer |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1010 Electric power system stability. Electric filters, Passive. |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20101-(S2) Master Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 01 Apr 2019 02:06 |
| Last Modified: | 01 Apr 2019 02:06 |
| URI: | http://repository.its.ac.id/id/eprint/62652 |
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