For a 15-bus system power system with 3 voltage-controlled buses, the size of Jacobian matrix of Newton-Raphson method used to solve load flow problem is:

For a 15-bus system power system with 3 voltage-controlled buses, the

1.	For a 15-bus system power system with 3 voltage-controlled buses, the size of Jacobian matrix of Newton-Raphson method used to solve load flow problem is:
A.	25 × 25
B.	12 × 12
C.	24 × 24
D.	11 × 11
Answer» B. 12 × 12

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