Voltage Regulationvoltage regulation of a line is defined as the change in voltage at the receiving end when full load at a given power factor is removed, the voltage at the sending end being kept constant. it is expressed as a fraction or a percentage of the receiving end voltage at full load. it can be written as,
Per unit regulation=Vrnl- Vrfl/ Vrfl
Percent regulation=(Vrnl-Vrfl/Vrfl) * 100
Efficiency of a Short Transmission Line
It is the ratio of the Power Output of the line to the Power Input of the line.