Thapar University 2007 M.Tech Power Systems Optimal operations of - Question Paper
Thapar Institute of Engineering & Technology
M.E. Power Systems & Electric Devices (1st Year)
Final Term exam
PS006 (Optimal operations of Power Systems )
Electrical & Instrumentation Engineering Department
Session : Jan. May, 2007 End Semester Examination M.E. (Power systems & Electric Drives)
PS-006 Optima) Operation of Power Systems Note: (i) Attempt any five questions. Time: 3.00 hrs. _(ii) Assume the missing data if any. Please do mention it.__M.M.: 72
1. (a) Whal is the significance of interchange of power in the present day scenario?
(b) What are the different strategies implemented for the interchange of power?
[4.8]
2. What is loss formula? Derive the exact loss formula. How can Krons loss formula be deduced from it? [ 10]
3. What is short term hydro-thermal scheduling? Derive the optimality conditions of scheduling
in discrete interval of time using Newton Raphson method.
4. (a) List the objectives of Automatic generation controller. Develop a block diagram representation of an automatic frequency controller used for hydro generator set. Start from the fundamentals principles. Clearly indicate the assumptions taken. Obtain its equivalent transfer function also.
(b) What is the concept of frequency bias tie line control? What is the basis of selection of bias factors?
[15,5]
5. For the load to be supplied from a hydro plant and a steam plant whose heat rate characteristics are given as:
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Steam unit Fuel cost is 1.15 Rs./Mbtu |
H=500 +8.0Pt +0.0016lV Mbtu/hr |
ISOMWsP-rS 1500MW |
|
Hydro plant Hydro plant is located at a good distance from the load |
q= 330+4.97 Ph acre-ft/hr. |
0<Ph1000MW |
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q= 5300 +12 (Ph-1000) +0.05 (Ph -1000)2 acre-ft/hr |
1000<Ph<l 100MW | |
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Electrical losses |
Pl = O.OOOO8P1/ MW. | |
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Load schedule |
2400-1200 : 1200MW ; 1200-2400 : I500MW | |
The hydro's unit reservoir is limited to a draw down of 1,00,000 acre-ft over the entire 24hr. period. Assuming the reservoir is large. Determine the optimum schedule for hydro and thermal unit for a day Process one iteration and indicate the initial data for second iteration. (Use Classical Technique).
Also write the algorithm of the technique used.
[15,5]
Luck favors the Brave
The evaluated answer books of the end semester examination in the course PS-006 may be seen on June 05, 2007 at 10.00 am in room no. C-104.
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Attachment: |
| Earning: Approval pending. |
