Simulation Of Low-Voltage AC Protection Systems Using Electromagnetic Transient Program (EMTP)

Zikri Abadi, Baharudin (2004) Simulation Of Low-Voltage AC Protection Systems Using Electromagnetic Transient Program (EMTP). Masters thesis, Universiti Teknologi Malaysia.

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Abstract

The sensitivity of semiconductor due to transient voltage surges have caused problem to industrial and residential systems. Therefore, surge protection model was designed to represent the transient surge voltage phenomenon. The objective of this research was to study the concept of surge propagation in low voltage (L V) systems and simulates a complete typical L V system A model of low voltage alternative current (AC) protection systems was designed by using the Alternative Transient Program (ATP-EMTP). This numerical analysis was used in order to investigate the dispersion of a surge transient voltage from life-neutral (L-N) and neutral-ground (NG) terminal. The model was developed and implemented into a low voltage power system protection simulation environment. The simulation data attained was compared and validated it with the experimental work. From the simulation of typical L V system, it was found that the L-N and N-G surges represented the common mode and differential mode, respectively. It was discovered that the surges will reflect the metal oxide varistor (MOV) connected across the life-ground (L-G) and neutral-ground (N-G) terminal. The 3 kA current employed at terminal entrance decreased to 0.5 A at L-N load demonstrated that the model developed was safe to be implemented in the residential system The simulation results of the MOV agreed well with the experimental data within 3 .27% of maximum error. It may concluded that the surge protection model was successfully designed to represent the transient surge voltage phenomenon.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Transients (Electricity), Electromagnetic fields
Subjects: T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Library > Tesis > FTK
Depositing User: Siti Syahirah Ab Rahim
Date Deposited: 02 Oct 2014 17:43
Last Modified: 28 May 2015 04:29
URI: http://eprints.utem.edu.my/id/eprint/13114
Statistic Details: View Download Statistic

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