Overhead Transmission Lines Analysis Considering Sag-Tension under Maximum Wind Effect


Muhammad Zulqarnain Abbasi,Muhammad Aamir Aman,Akhtar Khan,Mehr-E-Munir,






Grid stations get generated power from power stations that are ordinarily far; continuous consumption or use of electric power has expanded in most recent couple of years. Transmission system is the system by methods for which power is transmitted from place of generation to the consumers. Overhead wires or conductors are the medium used for transmission of power. These wires are visible to wind, heat and ice. The efficiency of the power system increases if the losses of these overhead wires are minimal. These losses are based on the resistive, magnetic and capacitive nature of the conductor. It is necessary to create or make proper design of these conductors accompanied by proper installation. To balance the working and strength of overhead transmission line and to minimize its capacitive effect the conductors must be installed in catenary shape. The sag is required in transmission line for conductor suspension. The conductors are appended between two overhead towers with ideal estimation of sag. It is because of keeping conductor safety from inordinate tension. To permit safe tension in the conductor, conductors are not completely extended; rather they are allowed to have sag. For equal level supports this paper provides sag and tension estimation with two different cases under maximum operating temperature 45 °C. To calculate sag-tension estimation of ACSR (Aluminum Conductor Steel Reinforced) overhead lines twoe different cases are provided with no and high wind speed effects. Four different span lengths are taken for same level supports. ETAP (Electrical Transient and Analysis Program) is used for simulation setup. The results shows that wind effect has great impact upon line tension and with addition of wind speed the sag of line remains same while tension altered.


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Author(s): Muhammad Zulqarnain Abbasi, MuhammadAamirAman, Akhtar Khan, Mehr-E-Munir View Download