(For USM Staff/Student Only)

EngLib USM > Ω School of Electrical & Electronic Engineering >

Analysis of power system harmonic effect on power distribution transformer / Nor Halim Bin Hayon

Analysis of power system harmonic effect on power distribution transformer_Nor Halim Bin Hayon_E3_2010_875003657_00003084351_NI
Peningkatan penggunaan beban tak lelurus dalam sistem kuasa elektrik meningkatkn lagi tahap harmonic. Peningkatan harmonik menyebabkan jangka hayat transformer menurun. Penggunaan system kadar yang dipanggil Faktor – K adalah untuk memastikan transformer boleh beroperasi dengan selamat apabila disambung dengan beban tak lelurus. Laporan ini menunjukkan kesan harmonik terhadap transformer pengagihan daripada eksperimen yang dibuat terhadap transformer tiga fasa dengan kadaran 500 VA. Kesan harmonik dikaji dengan menyambungkan beban tak lelurus pada keluaran transformer. Beban yang digunakan dalam eksperimen ini adalah perintang dan penerus. Eksperimen dijalankan untuk mengkaji kesan harmonik terhadap transformer seperti kehilangan, kadaran kuasa, factor kuasa dan peningkatan suhu transformer. Dalam laporan ini mengandungi langkah yang digunakan untuk mengurangkan kesan harmonik terhadap transformer dengan menggunakan kaedah nyahkadaran. Nyahkadaran yang digunakan adalah Standard BS7821. Keputusan daripada eksperimen menunjukkan suhu akan meningkat apabila jumlah herotan harmonik bertambah. Jumlah kehilangan dan kadaran transformer juga akan meningkat apabila jumlah herotan harmonik meningkat. Faktor kuasa akan menurun apabila jumlah herotan harmonik meningkat. Untuk %THDi 24.3%, 38.8%, 64.3%, 70.8% dan 80.7%, peratus nyahkadaran transformer adalah 92.59%, 89.91%, 86.82%, 85.51% and 85.40%. ____________________________________________________________________________________ The increases use of non – linear load has increased the level of harmonics in electrical power system. The increases of harmonics cause the reducing of the transformers life expectancy. The used of rating system called K – Factor is to ensure that the transformer can operate safely when supplying non-sinusoidal load current. The effect of harmonic on distribution transformer is reported in this thesis. The experiment was conducted at three phase transformer with capacity of 500 VA. The effect of harmonics on distribution transformer has been investigated by connecting non – linear load to the output of transformer. The load used in the experiment are resistance and rectifier. In addition, the effect of harmonic to the transformer such as losses, power rating, power factor and temperature rise. The analyzing the derating method also introduced to reduce the harmonic effect on transformer. The derating method is suggested accordance to BS7821 standard. The results show that the temperature increased linearly when total harmonic distortion increases. The power loss also increased linearly when total harmonic distortion increased. The power factor of transformer decreased linearly when total harmonic distortion increased. For %THDi 24.3%, 38.8%, 64.3%, 70.8% and 80.7%, the percentage of derating transformer is 92.59%, 89.91%, 86.82% , 85.51% and 85.40%.
Contributor(s):
Nor Halim Hayon - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875003657
Barcode : 00003084351
Language:
English
Subject Keywords:
system called K – Factor is to ensure that the transformer can operate safely when supplying non-sinusoidal load current; resistance and rectifier; analyzing the derating method also introduced to reduce the harmonic effect on transformer.
First presented to the public:
1/4/2010
Original Publication Date:
4/10/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 77
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-03-14 12:29:12.874
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Nor Hayati Ismail

All Versions

Thumbnail Name Version Created Date
Analysis of power system harmonic effect on power distribution transformer / Nor Halim Bin Hayon1 2018-03-14 12:29:12.874