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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER VII- EXAMINATION SUMMER 2017
Subject Code: X70904 Date: 05/05/2017
Subject Name: Advanced Power System I
Time: 02.30PM to 05.00PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Briefly describe all conventional control mechanisms used for electrical transmission network.
07

Compare HVDC and HVAC transmission line at a length.
07
Q.2

Explain the reactive power control methods for uncompensated line in detail.
07

Represent the reactive power control mechanism with necessary circuit, waveform and equation.
07
OR

Write a short note on equipments required for HVDC transmission line
07
Q.3

Write a note on "three phase TCR".
07

Write a note on series compensation.
07
OR
Q.3

Explain 12 pulse bridge converter in detail.
07

Give a neat diagram of the basic control system for HVDC converters and explain various controls incorporated in the system.
07
Q.4

Explain configuration and characteristics of saturated reactor.
07

Write a short note on HVDC line and its advantages in India.
07
OR
Q.4

Compare different SVCs in context to losses and performance.
07

Explain the role of different power electronics devices in HVDC line with their characteristics.
07
Q.5

Compare the series and shunt compensation at a length.
07

Derive the equation of midpoint voltage of a symmetrical line as a function of the power flow
07
OR
Q.5

What is an HVDC VSC system? Explain in detail with diagram
07

Explain the effect of compensation on the power transfer capacity of transmission line with necessary equations.
07