QUESTION FROM PREVIOUS QUESTION PAPERS
    1. Draw the block diagram of load frequency control of a two-area control system
    2. What is area control error? What are the control strategies?
    1. What is load frequency control in a two-area power system? Why is it essential to maintain constant frequency in an inter-connected power system?
    2. Two power stations A, B are interconnected by a tie-line and an increase in load of 250 MW on system B causes a power transfer of 150 MW from A to B. When the tie-line is open, the frequency of System A is 50 c/s and that of system B is 49.5 c/s. Determine the value of KA and KB, which are the power frenquency constants of the two generators.
  3. Explain the power frequency characteristics of an interconnected power system. ...

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