Investigation On The Effect Of Transient Overvoltage On Electrical Cable

Amirul Akmal, Abd Rahman (2012) Investigation On The Effect Of Transient Overvoltage On Electrical Cable. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Lightning strike to overhead electrical power cable or transmission line may cause the high effect of transient overvoltage which lead to permanent damages and affect the transmission line performance. These studies focus on the developing of lightning model as well as the cable model. PSCAD software is the main tools for the simulation works. Furthermore the effect of transient overvoltage to the cable with different parameters were observed by simulating and analyzing the proposed models. In addition, the pattern of the currents and voltages from different topologies and cable’s parameters were analyzed when the lightning current wave shape of 8/20 was performed. It is found that the patterns of phases currents such as the peak current, the unwanted frequency and the surge duration signal were similar to each other under different parameters of the cable. Similarly, it is observed that the pattern of the phases voltage such as the peak current, the unwanted frequency and the surge duration signal were similar to each other under different parameters of the cable. In addition, we investigated the direct strike to the transmission line model for the cable under hot temperature (38 Celcius) especially in tropical location such as in Malaysia. It appears that the peak current, the unwanted frequency and the surge duration was similar to the standard value provided by the factory. In future, this project may initiate for the study of scheme protection planning base on available basic insulation level guideline.

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