Determining correction factor of power cable sizing under nonlinear load condition
| dc.contributor.author | Azizan, Muhammad Mokhzaini | |
| dc.date.accessioned | 2016-11-09T01:29:05Z | |
| dc.date.available | 2016-11-09T01:29:05Z | |
| dc.date.issued | 2008-12 | |
| dc.description.abstract | The invention of electronic equipment has lead to a serious power quality problem in harmonics. The equipments, also known as the nonlinear loads have the ability to distort parameters such as voltage and current. Distortion of current, particularly, is lethal to power system and among the power system parameters to be having direct impact of harmonic in current is power cables. Component of harmonics might increase RMS value of current, thus jeopardizing insulation of cable. The conducting part of cable might be exposed and in a confined cable trunking pipe; contact with other cable is possible and short circuits would cause power system break down. Looking at the possible solution, this thesis has come up with a correction factor for power cable sizing, particularly under nonlinear load condition. Few power cable samples are to be undertaken series of tests involving harmonic content in current, for both single phase and three phase power system. The increment of THD; is measured as well as its corresponding increase of temperature. The result of the thesis is the constant that relates power cable operating temperature and content of harmonic (THD) in current. For single phase power system, K value obtained as variation of THD; from 0% to 80%, equals 0.40 ± 0.015. More complicated power cable solution reserved for three phase power system where neutral cable plays a big part in sizing method. For injection ofTHD; at phase ranging from 0% to 40%, the constant value is 0.41 ± 0.009 where mostly the sizing would be referred to phase cable's size. However, as harmonic content at phase amounted from 50% to 80%, a different constant is obtained due to the influence of neutral cable current loading, which yields constant is 0.47 ± 0.004. Another finding is the current reduction rate for both single and three phase power system which it to be applied in inverse, so that equivalent load current can be determined. A relation between power cable sizing and THD; has been established; through power cable's operating temperature parameter. Power cable sizing solution under nonlinear load condition has been successfully determined. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/3030 | |
| dc.subject | The nonlinear loads have the ability to distort | en_US |
| dc.subject | parameters such as voltage and current | en_US |
| dc.title | Determining correction factor of power cable sizing under nonlinear load condition | en_US |
| dc.type | Thesis | en_US |
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