Power System Objective Questions and Answers

330. A power system consists of 300 buses out of which 20 buses are generator buses, 25 buses are the ones with reactive power support and 15 buses are the one with fixed shunt capacitors. All the other buses are load buses. It is proposed to perform a loadflow analysis for the system using Newton-Raphson method. The size of the Newton-Raphson Jacobian matrix is

331. Choose two appropriate auxiliary components of a HVDC transmission system from the following P D.C. line inductor. Q A.C. line inductor R Reactive power sources S Distance relays on D.C. line T Series capacitance on A.C. line

A. P and Q

332. The interrupting time of circuit breaker is the period between the instant of

A. initiation of short circuit and the arc extinction on an opening operation

B. energizing of the trip circuit and the arc extinction on an opening operation

C. initiation of short circuit and the parting of primary arc contacts

D. energizing of the trip circuit and the parting of primary arc contacts

Discussion

333. The rated voltag of a 3-phase power system is given as