Symmetrical Components of Transmission Line Parameters based on the Installed Tower Ground Resistivity
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Date
2020-03-01
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Publisher
Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences
Abstract
Transmission is a component of the electric power system alongside the generation and distribution systems. Effective and efficient planning is often required in system design and operation to ensure consistency and reliable supply of power to the Customers. Thus, transmission line parameters analysis needs to be carried out to ensure this proper planning. One of the crucial equipment used in transmission’s overhead lines is Tower supports which are of different configurations considering the Structural design, voltage ratings, and current transmission. Very often, towers are randomly installed to carry lines of the chosen voltage and current rating without considering the effects of earth resistivity on which the tower is installed. This paper presents the transmission line symmetrical component parameters evaluation of a chosen Transmission tower. An algorithm was developed, and a Python software program was used to implement this algorithm for the analysis. In achieving the target, the selected tower was imagined to have been erected on six different earth resistivity grounds which include, Sea water, swampy ground, pure slate, sandstone, and general average ground. Symmetrical component parameters evaluated include impedance, characteristics impedance, propagation constant, shunt admittance, and capacitive susceptance as they were found to be important in the effective monitoring of power transmission and distribution. The results of the analysis are presented and discussed. These results show that capacitive susceptance is independent on the tower's earth resistivity and varies for different tower structural configurations while other parameters vary with the earth resistivity value of the tower. Furthermore, regular line parameters monitoring is a measure that minimizes power transmission losses in networks.