Power System Operation and Control

COMPETITIVE EXAMINATION QUESTIONS

1. The combined frequency regulation of machines in area of capacity 1500 MW and operating at a nominal frequency of 60 KHz is 0.1 pu on its own base capacity. The regulation in Hz/MW will be        (IES 1997)
   1. 0.1/1500
   2. 60/1500
   3. 6/1500
   4. 60/150
2. Load frequency control uses        (IES 1999)
   1. proportional controllers alone
   2. integral controllers alone
   3. both proportional and integral controllers
   4. either proportional or integral controllers
3. The speed regulation parameter R of a control area is 0.025 Hz/MW and load frequency constant D is 2 MW/Hz. The area frequency response characteristic (AFRC) is        (IES 2000)
   1. 42.0 MW/Hz
   2. 40.0 MW/Hz
   3. 20.0 MW/Hz
   4. 2 MW/Hz
4. The electrical stiffness of a synchronous generator connected ...