2018-19
- What is meant by voltage surge?
- Explain step by step method of system stability with suitable diagrams.
- A 300 KV, 5 μ Sec rectangular surge travels along the line terminated by a capacitor of 1500 pF. Determine the voltage across the capacitance and reflected voltage wave if the surge impedance loading of line is 300 ohm.
- Explain surge impedance and velocity of propagation of travelling waves.
- Derive the expression for reflection and refraction coefficients of voltage and current waves when a line terminated through a resistance or a cable.
2017-18
- Explain the methods of improving steady state stability.
- Explain the swing curve.
- Define: characteristic impedance loading and surge impedance loading.
- Find the CIL of 200 kV transmission line.
- Deduce the general wave equations for a loss less transmission line for propagation ofvoltage and current wave.
- Determine reflection co-efficient and transmission coefficient for receiving end of transmission line terminated by resistance.
- Explain the Bewley’s Lattice diagram. Write a note on surge phenomenon. Define the protection against overvoltages.
2016-17
- What is meant by voltage surge?
- What is meant by a lightning arrester?
- Develop wave equation for an uniform transmission line and find the velocity of its propagation. Derive the expression for reflection and refraction coefficients of voltage and current waves when a line terminated through a resistance or a cable.