Power system A is operating in parallel with other systems and has a frequency bias of 50 MW/0.1 Hz. For a loss of generation in one of the interconnected systems resulting in a frequency drop of 0.02 Hz, system A should

• A. not be affected
• B. provide 20 MW of support
• C. provide 30 MW support
• D. provide 10 MW of support

Answer: (D)