Transmission Line Design (Sag & Tension Calculation) in eastern Grid Project

Abstract

Electric power transmission line design is highly affected by the climatically conditions. Sudan climate is partially tropical & Subtropical considering that maximum & minimum temperature differences are between 5oC to 50oC night and day time respectively, form which high temperature is the main reason in transmission lines capacities. The objective of this thesis is to (1) calculate the maximum sag and tension of transmission line between Gadarif and Shwak Substations under maximum temperature conditions. (2) To calculate the final and initial (sag & tension) in different condition of the winds. The thesis also explains the climatic conditions and their effects on the line components design such as conductors and insulators. It is also intended to choose the suitable design which enhances the line stability during transient and sub-transient conditions and the creep age distance after detecting the level of pollution. Newton Raphson Method is used with the help of MATLAB software and parabolic equation is applied to solve the sag and tensions in different conditions using conductor technical particular specifications.