Tujuan utama projek ini adalah untuk menyiasat pengherotan harmonik
dan kehilangan kuasa di Kampus Kejuruteraan USM. Pada kebiasaannya,
beban yang tidak linear akan menyebabkan penjanaan harmonik yang boleh
mengakibatkan kepanasan berlebihan terhadap peralatan elektrik. Di dalam
projek ini, Pusat Pengajian Kejuruteraan Elektrik & Elektronik dan Pusat
Komputer adalah tempat yang dipilih sebagai kajian disebabkan banyak
penggunaan beban tidak linear berbanding tempat lain di kampus ini.
Pengukuran paras harmonik telah dijalankan dan punca harmonik dapat
dikenalpasti. Pengukuran paras arus harmonik dalam sistem pengagihan telah
menjelaskan bahawa kebanyakan paras arus harmonik adalah lebih daripada
20% di mana lebih daripada piawai IEEE dan tidak dapat diterima. Keputusan
menunjukkan paras arus harmonik tertinggi ialah 77.0% untuk talian kuasa ke
Makmal Satelit di Pusat Pengajian Kejuruteraan Elektrik & Elektronik.
Fenomena pengaliran arus neutral dalam sistem pengagihan empat wayar yang
disebabkan oleh harmonik bernombor gandaan tiga dan sistem tiga fasa yang
tidak seimbang telah disiasat. Pengiraan menunjukkan semua peratus nisbah
antara arus neutral dan arus fasa adalah lebih daripada 50%. Peratus nisbah
antara arus neutral dan arus fasa yang tertinggi adalah 121.49% untuk talian
kuasa ke Makmal Pengajaran di Pusat Komputer. Kesan pengherotan harmonik
kepada faktor kuasa dan kehilangan kuasa dalam sistem pengagihan telah
diramalkan. Tiada peratus tetap untuk menunjukkan kehilangan kuasa yang
berlebihan dan penurunan faktor kuasa yang disebabkan arus harmonik
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The main purpose of this project is to investigate harmonic distortion and
losses in the USM Engineering Campus. Often the nonlinearity of the load will
results in the generation of harmonic that can cause overheating of the
electrical equipment. In this project, the School of Electrical & Electronic
Engineering and the Computer Centre are the selected places to be the case
study due to many nonlinear load appliances compare to other places in this
campus. The measurement of harmonic current level had been carried out and
the source of harmonic had been identified. The measurement in the
distribution system have illustrated that most of harmonic current levels are
greater than 20% which are totally out of the IEEE standard and cannot be
accepted. The results show that the highest harmonic current level recorded is
77.0% for power line to Satellite Lab at School of Electrical & Electronic
Engineering. The phenomena of neutral current flow in four-wire distribution
system due to triplen harmonic and unbalanced three phase system had been
investigated. The calculation shows all the percentage of the ratio between
neutral current and phase current are greater than 50%. The highest
percentage of the ratio between neutral current and phase current is 121.49%
for power line to the Instruction Lab at the Computer Centre. Effect of harmonic
distortion to power factor and power loss in distribution system had been
predicted. No fixed percentages to show the extra power loss and decrease in
the power factor due to harmonic current.
investigate harmonic distortion and losses in the USM Engineering Campus; nonlinearity of the load will
results in the generation of harmonic that can cause overheating of the electrical equipment; phenomena of neutral current flow in four-wire distribution system due to triplen harmonic and unbalanced three phase system
Investigation of harmonic distortion and losses in usm engineering campus_Nur Iryani Binti Baharudin_E3_2010_875003584_00003084275_NI