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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-VIII EXAMINATION WINTER 2018
Subject Code:X80904 Date: 19/11/2018
Subject Name: Advanced Power System-II
Time: 02:30 PM TO 05:00 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

Describe structure of deregulated power systems in India. Give main points of electricity act 2003.
07

Write a detail note on "Power System Security".
07
Q.2

What is load forecasting? Write short note on different methods of load forecasting.
07

What is voltage collapse? Which are the factors responsible for voltage collapse?
07
OR

Derive expression of mid-point voltage of a transmission line in terms of real
power flow and line length.
07
Q.3

Explain static and dynamic state estimation of power system.
07

Explain transition from an alert state to an emergency state of a power system
with suitable example.
07
OR
Q.3

Describe power system operating states with the help of a neat figure.
07

Describe process of restoration after a black out.
07
Q.4

Discuss sensitivity factors used in security analysis.
07

Write short note on applications of power system state estimation.
07
OR
Q.4

Discuss vertically integrated utility in brief. Discuss its advantages and disadvantages with respect to deregulated power system.
07

What is bad data in state estimation. Explain chi-square technique for bad data detection.
07
Q.5

Explain different states of power system with their interrelations on diagram showing conditions of equality and inequality constraints.
07

Discuss extrapolation method of load forecasting.
07
OR
Q.5

What is contingency analysis? Construct flow chart for contingency analysis procedure in general.
07

Derive an expression for critical angle and critical voltage at receiving end at voltage stability limit.
07