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  Experiment: Measurement of ABCD parameters of a long transmission line with magnitude and angle. Appratus:  variable Voltage Source (Variac) 230V AC with 2-Pole S/W No of  π  sections: 4 (100Km each) value of each component: Resistance = 4 Ohm; Capacitance = 0.47 microF; Inductance: 110mH. Voltmeter: 230 V AC  (2 Nos) Ammeter: 5 A (2 Nos) Watt meter: 300V, 5A  (1 Nos) Theory: ABCD Parameters of a Two Port Network In any 4 terminal network, (i.e. linear, passive, bilateral network) the input voltage and input current can be expressed in terms of output voltage and output current. Each port has 2 terminals to connect itself to the external circuit. Thus it is essentially a 2 port or a 4 terminal circuit, having: Given to the input port PQ. Given to the output port RS. Now the ABCD parameters of the transmission line provide the link between the supply and receiving end voltages and currents, considering the circuit elements to be linear in nature. Thu...

 Power System Experiment :  Measurement of ABCD parameters of a medium transmission line with magnitude and angle. Appratus:  variable Voltage Source (Variac) 230V AC with 2-Pole S/W No of  π sections: 2 (100Km each) value of each component: Resistance = 4 Ohm; Capacitance = 0.47 microF; Inductance: 110mH. Voltmeter: 230 V AC  (2 Nos) Ammeter: 5 A (2 Nos) Watt meter: 300V, 5A  (1 Nos) Theory: Medium Transmission Line A transmission line having a length of more than 80 kms but less than 250 kms is considered as a medium transmission line. The parameters (Resistance, Inductance, and Capacitance) are distributed uniformly along the line. For a  medium transmission line, charging current is appreciable and due to the length of the line the shunt admittance plays a significant role in the calculation of the effective parameters of the line. The shunt admittance and series impedance are considered as a lumped parameter of the medium transmission line. T...