The bus admittance (Ybus ) matrix of a 3-bus power system is given below.
Considering that there is no shunt inductor connected to any of the buses, which of the following can NOT be true?
A single-phase, two wire transmission line, 15 km long, is made up of round conductors, each 0.8 cm radius, separated from each other by 40 cm. The equivalent diameter of a fictitious hollow, thin-walled conductor having the same inductance as the original line is given by
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If the conductor radius increases, inductance of the line,
For an underground cable, the surge impedance is generally taken as
Consider the following phenomenon occuring in a power system:
1. Corona loss
2. Charging current
3. Ferranti effect
4. Dielectric loss
5. Skin effect
Which of the above are associated with transmission lines?
The corona loss or the critical disruptive voltage in a transmission line at a temperature (f) and pressure (b) can be foundout by Using “air density correction factor (δ)” given by
A three-phase, 50 Hz, 400 kV, transmission line is 300 km long. The line inductance is 0.97 mH/km per phase and capacitance is 0.0115 μF/km per phase. Assuming a lossless line, the surge impedance of the line will be
The resistance and reactance of a short line are equal. At zero regulation the load will be
Shunt reactors are needed
Operating transmission lines close to their maximum power transfer capability will impair
25 docs|247 tests
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25 docs|247 tests
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