North Carolina State University

ECE 550

I certify that I have not received nor given unauthorized aid for this test ___________________
This is a closed book exam, only one page formula sheet and an engineering calculator is allowed.
Show all the work you do on the paper in order to receive credit for an answer!
Use only the general analysis methods and do only one iteration if you use an iterative procedure.
All the questions in this exam are related to the operation and control of an isolated system whose oneline diagram is given below.

The generators each has M = 100 MW.sec. and is equipped with a governor with a droop range of 0.5
- 5%. The load has Dwo = 0.2 MW.
A basic model for the power-frequency control loop for the generators is given below.