Transmission and Distribution: Unit II: (a) Modelling and Performance of Transmission Lines
Three Phase Short Transmission Line
In the analysis of short transmission lines, the capacitive effects are small and neglected. The resistance and inductance of the line are only taken into consideration.
Three Phase Short Transmission Line
Usually transmission of electrical power is done using 3 phase system. It can be treated as three single phase units with each conducting unit transmitting one third of the total power. The analysis of 3 phase system is done by considering only one phase as similar conditions can be obtained in three phase system.
The expressions obtained for regulation, efficiency in case of single phase system are valid in case of 3 phase system. Here we have to take the phase voltages for VS and VR. Similarly R and XL are resistance and inductive reactances per phase respectively.
Consider a star connected generator supplying a balanced star connected load through a transmission line. This is shown in the Fig. 2.6.1 (a) and Fig. 2.6.1 (b) shows one phase separately.
Transmission and Distribution: Unit II: (a) Modelling and Performance of Transmission Lines : Tag: : - Three Phase Short Transmission Line
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Transmission and Distribution
EE3401 TD 4th Semester EEE Dept | 2021 Regulation | 4th Semester EEE Dept 2021 Regulation