GATE Electrical 2016 Set 1 | Question: 19

Question

In a $100$ bus power system, there are $10$ generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the $PV$ buses are converted to $PQ$ type. In this iteration,

• A. The number of unknown voltage angles increases by two and the number of unknown voltage magnitudes increases by two.
• B. The number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes increases by two.
• C. The number of unknown voltage angles increases by two and the number of unknown voltage magnitudes decreases by two.
• D. The number of unknown voltage angles remains unchanged and the number of unknown voltage magnitudes decreases by two.