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2003 Course Power System Operation & Control

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Total No. of Questions : 12] [Total No. of Pages : 3 [3864] - 221 P 1059 B.E. (Electrical) POWER SYSTEM OPERATION AND CONTROL (2003 Course) (403141) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any three questions from each section. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. SECTION - I Q1) a) b) Discuss with diagram the equal area criterion of stability for sudden increase in mechanical input to the generator. [10] Explain the effect of clearing time on stability of power system. Also discuss the concept of critical clearing angle and critical clearing time.[6] OR Q2) a) b) Q3) a) b) A 50 Hz, three phase synchronous generator capable of supplying 300 MW of power is connected to a large system and is delivering 120 MW when a three phase fault occurs at its terminals, determine [8] i) The time in which fault must be cleared, if the maximum power angle is to be 80o. Assume H = 10 MJ/MVA. ii) The critical clearing angle. Discuss the point by point method for solution to swing equation. [8] Explain the concept of Unit Commitment. Enlist the methods for Unit Commitment. [6] Discuss the dynamic programming method used for Unit Commitment. [10] OR Q4) a) b) Explain priority list method used for Unit Commitment. [8] Discuss various constraints in case of thermal and hydro generators.[8] P.T.O.

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