LOADING
Question

Consider the following statements in respect of load flow studies in power system :          

1. Bus admittance matrix is a sparse matrix

2. Gauss-Seidel method is preferred over Newton Raphson method for load flow studies

3. One of the buses is taken as slack bus in load flow studies

Which of these statements are correct? 

A.

1,2 and 3 

B.

1 and 2 

C.

1 and 3 

D.

2 and 3

Answer ( Option C)

1 and 3 

Solution

Load flow studies in power system :

1. The NR method is decidedly more suitable than the GS method for all but very small system.

2. Bus admittance ( Ybus) matrix is a sparse matrix.

3. One of the bus is taken as slack bus in flow studies.

Hence, the correct option is (C).

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RPSC-AE, RSMSSB-JE, SSC-JE, RRB-JE, PSU's