Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line?

• A.  -0.52 Hz
• B.  0.52 Hz
• C.  0.48 Hz
• D.  50 Hz

Answer: (B)