GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Name: Power System Operation and Control
Time: 02:30 PM TO 05:00 PM
Date: 25/11/2019
Total Marks: 70
Subject Code: 2180909
GUJARAT TECHNOLOGICAL UNIVERSITY
--- Content provided by FirstRanker.com ---
BE - SEMESTER- VIII (New) EXAMINATION — WINTER 2019Subject Name: Power System Operation and Control
Time: 02:30 PM TO 05:00 PM
Date: 25/11/2019
Total Marks: 70
--- Content provided by FirstRanker.com ---
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.1 | (a) State operating states with nature of control action in a power system. | 03 |
| (b) Write importance of frequency and voltage control. | 04 | |
| (c) Explain operation of transmission line for no load condition. | 07 | |
| Q.2 | (a) Draw block diagram which shows state estimation. | 03 |
| (b) Explain how a relationship between voltage regulation and reactive power is governed by short-circuits capacity of transmission line. | 04 | |
| (c) Describe least square approximation state estimation. | 07 | |
| OR | ||
| (c) Explain the effect of tap-changing transformer in voltage control of a transmission line | 07 | |
| Q.3 | (a) State and Define sensitivity factors with mathematical model. | 03 |
| (b) Explain System monitoring and Contingency Analysis related to power system security. | 04 | |
| (c) Derive equation which shows relation between maximum power and line length of power line. | 07 | |
| OR | ||
| (a) Show graphical representation of power transfer and line length. | 03 | |
| (b) List a few practical aspects for describing the reactive power flow problem resulting voltage collapse. | 04 | |
| (c) Prove that the receiving end voltage is extremely sensitive to any change in power status at the receiving end bus. | 07 | |
| Q.4 | (a) Classify bad data for state estimation. | 03 |
| (b) Describe steps for detection of bad data. | 04 | |
| (c) Briefly discuss the concept of “Control Area” for automatic Load Frequency Control and hence explain two Area Load Frequency Control. | 07 | |
| OR | ||
| (a) List out different load forecasting methods. | 03 | |
| (b) Discuss reflection of load forecasting in current and future trends of power system. | 04 | |
| (c) A 100 MVA, 50 Hz synchronous generator having inertia constant of the machine as 5 kW-sec per kVA. The load suddenly increases by 50 MW. Due to delay in governor action there is a delay of 0.6 seconds in opening of steam valve. Find the frequency deviation. | 07 | |
| Q.5 | (a) Explain static and dynamic state estimation. | 03 |
| (b) Discuss international scenario related to deregulation. | 04 | |
| (c) Explain power sector scenario of India. | 07 | |
| OR | ||
| (a) Differentiate Regulated power system and Deregulated power system. | 03 | |
| (b) Explain importance of state estimation in power system. | 04 | |
| (c) Explain deregulation of power supply and state it’s benefits | 07 |
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---