EE 8001IV/IV B.Tech DEGREE EXAMINATION,MARCH,2015Eighth Semester

ELECTRICAL AND ELECTRONICS ENGINEERING

POWER SYSTEM OPERATION AND CONTROLSolutions & SchemePart-A is compulsory

PART-A 101=10Ma . Draw the Heat rate characteristic curve b . Write the Transmission Loss Formula B-coefficients General form

For 3 plants

PL = P12 B11 + P22 B22 + P32 B33 + 2P1P2 B12 + 2P2P3 B23 + 2P1P3 B13c . Represent the speed governing system with a block diagram d . How optimal control can be determined in case of LFC problem? For a given load, the contribution from each unit and each plant is to be determined so that the cost of power delivered is minimume . What is the reactive power control significance in synchrnous machine?

When ,E cos>V ,Then the machine is over excited, machine generates reactive power i.e it acts as a capacitor

E cos