Ting, Guan Ket (2006) Effect Of Harmonics On Power Measurement. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Elektrik dan Elektronik. (Submitted)
|
PDF
Download (257kB) | Preview |
Abstract
Harmonic has become a serious problem in electrical power system due to the rapid growth of non-linear loads from year to year. This final year project dealt with the effect of harmonics on power measurement. The objective of this research was to identify the presence of harmonic voltage and harmonic current when non-linear load is connected to the power system. This research also analysed the effect of harmonic current on power measurement by using a set of THD current value to test the measurement of power system quantities such as power factor PF, active power P, reactive power Q and apparent power S. The suitability of power measuring instruments under the effect of harmonics in power system was also be analysed. In this project, the derivation of mathematic equations was carried out to analyse the effect of harmonics on the measurement of power system quantities. Laboratory experiment was also carried out and experimental results were compared with theory and mathematical equations. A single phase bridge rectifier was built to implement the laboratory experiments. The output load of the rectifier was connected to variable resistors and capacitors. The source of the rectifier was a voltage supply of 240V, 50Hz. This rectifier circuit was used as non-linear load in this research. The total harmonic distortion for input voltage and current would change when the value of variable resistors and capacitors were adjusted. Power system quantities for a set of THD current values were collected to analyse the effect of harmonic current on power measurement. The experimental results showed that non-linear load is normally causing harmonic current distortion in the power system. The distortion of input voltage is very low and can be ignored. Fluke meter is the most suitable equipment which used to measure the distorted waveforms. The results also show that when harmonic current distortion is increasing, the value of power factor PF and active power P would decrease. But reactive power Q would decrease and apparent power S remains constant as the level of harmonic current increases.
| Item Type: | Monograph (Project Report) |
|---|---|
| Subjects: | T Technology T Technology > TK Electrical Engineering. Electronics. Nuclear Engineering |
| Divisions: | Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraaan Elektrik & Elektronik (School of Electrical & Electronic Engineering) > Monograph |
| Depositing User: | Mr Engku Shahidil Engku Ab Rahman |
| Date Deposited: | 24 May 2023 04:05 |
| Last Modified: | 24 May 2023 04:05 |
| URI: | http://eprints.usm.my/id/eprint/58698 |
Actions (login required)
 |
View Item |
