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Gujarat Technological University

This document is an exam for a Power System Analysis course, consisting of 5 questions covering various topics: 1. Newton-Raphson power flow method and operating states of power systems. 2. Symmetrical fault analysis and comparison of Newton-Raphson and Fast Decoupled Load Flow methods. 3. Optimal dispatch, security dispatch, generation shift factors, and line outage distribution factors. 4. State estimation applications, sparse matrix storage techniques, and bad data detection/identification. 5. Network observability, pseudo-measurements, voltage stability factors, voltage collapse, and open conductor faults.

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15 views1 page

Gujarat Technological University

This document is an exam for a Power System Analysis course, consisting of 5 questions covering various topics: 1. Newton-Raphson power flow method and operating states of power systems. 2. Symmetrical fault analysis and comparison of Newton-Raphson and Fast Decoupled Load Flow methods. 3. Optimal dispatch, security dispatch, generation shift factors, and line outage distribution factors. 4. State estimation applications, sparse matrix storage techniques, and bad data detection/identification. 5. Network observability, pseudo-measurements, voltage stability factors, voltage collapse, and open conductor faults.

Uploaded by

mec091owner
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Seat No.: ________ Enrolment No.

___________

GUJARAT TECHNOLOGICAL UNIVERSITY


ME - SEMESTER– 1 (NEW) • EXAMINATION – SUMMER - 2021

Subject Code:3710711 Date: 20 Sep 2021


Subject Name:Power System Analysis
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 (a) Draw the flow chart for Newton-Raphson method for ‘n’ bus power system 07
having both PV and PQ buses.
(b) Discuss the operating states of power system keeping security in view. 07
Q.2 (a) Explain symmetrical fault analysis using bus impedance matrix with necessary 07
algorithm.
(b) Compare and contrast the Newton-Raphson method and Fast Decoupled Load 07
Flow (FDLF) method of power flow analysis.
OR
(b) Explain : WARD equivalents 07
Q.3 (a) Explain: (1) Optimal dispatch and (2) Security dispatch with suitable example. 07
(b) Explain generation shift factor and line outage distribution factor for power 07
system security analysis.
OR
Q.3 (a) How does the voltage collapse phenomenon occur with variation of Q? Explain 07
with the help of Q-V curve.
(b) Explain performance index (PI). How is it useful for contingency selection? 07
Q.4 (a) What is ‘State Estimation’? Explain the applications of power system state 07
estimation with suitable diagrams.
(b) Explain sparsity techniques. Discuss any one method to store sparse matrix in 07
computer.
OR
Q.4 (a) Explain: Detection and identification of bad data measurements. 07
(b) What is the meaning of simultaneous faults? Explain the series-series (Z type) 07
fault.
Q.5 (a) What is Network Observability and Pseudo measurements? Explain in detail. 07
(b) What are the factors affecting voltage collapse and insecurity. Explain the voltage 07
stability relation with these factors.
OR
Q.5 (a) Define term voltage instability and long term voltage instability. Give examples 07
of occurrences of voltage instability in short term and long term range.
(b) What is open conductor fault? Derive fault current equation for two open 07
conductor condition.

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