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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-VII EXAMINATION WINTER 2018
Subject Code:X70904 Date: 29/11/2018
Subject Name: Advanced Power System-I
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Explain different methods of reactive power control.
07

What is the basic concept behind use of FACTS? State different advantages of FACTS.
07
Q.2

Explain working of UPFC with neat schematic diagram.
07

Explain different types of HVDC transmission scheme.
07
OR

What is symmetrical transmission line? Derive equation to find midpoint
Voltage of a symmetrical line as function of the power flow P on it.
07
Q.3

Write a short note on: Automatic Generation Control and Excitation Control.
07

Explain working of 6 and 12 pulse TCR.
07
OR
Q.3

What is HVDC-VSC system? Give its advantages and application.
07

Explain working of STATCOM with schematic diagram.
07
Q.4

Draw the typical layout of HVDC transmission system. Give the function of component used in HVDC transmission system.
07

Discuss advantages and limitations of HVDC.
07
OR
Q.4

Explain HVDC converter Analysis of Voltage Waveform with overlap angle
07

Inverter Extinction Angle Control of HVDC converter.
07
Q.5

Explain Generation of Harmonics by Converters in HVDC system.
07

Explain power reversal in HVDC line.
07
OR
Q.5

Explain conventional methods of real power control in transmission line.
07

Why is bipolar line more commonly used? Also give comparison of HVDC link with EHVAC link.
07