EE6302 POWER SYSTEM ANALYSIS, Third year, Department of Electrical & Electronics Engineering, First and second Units Questions

EE6302 POWER SYSTEM ANALYSIS, Third year, Department of Electrical & Electronics Engineering, First and second Units Questions.

PART A (10x2=20)

1.      What is single line diagram?

2.      Define per unit value

3.      Draw a simple per-phase model for a cylindrical rotor synchronous machines

4.      What do you mean by transient & steady state conditions?

5.      Draw the equivalent circuit of three winding transformer

6.      What is the need for load flow study?

7.      When it generated bus treated as load bus?

8.      What is Jacobian matrix?

9.      What is a slack bus?

10.  What is meant by acceleration factor in load flow studies?

Part B (5x13=65)

11.  Draw the reactance diagram for the power system shown in Fig.1. Neglect resistance & use a base of 50 MVA & 13.8 KV on generator G₁.

Determine the new value of per unit reactance of G₁, T1, Transmission line 1, Transmission line 2, G₂, T2, G3 and T₃

12.  Form Y_bus of the test system shown in Fig.2 using singular transformation method. The impedance data is given in Table 1. Take (1) as reference node.

13.  The one-line diagram of a power system is shown in fig(i). The three phase power and line-line ratings are given below.

Draw an impedance diagram showing all impedance in per-unit on a 100 MVA base. Choose 22 KV as the voltage base for generator.

14.  Draw and explain the step by step procedure of load flow solution for the Gauss seidal method when PV bus are present

15.  Draw the impedance diagram for the electric power system shown in fig 1 showing all impedance in per unit on a 100 MVA. Choose 20 KV as the voltage base for generator. The three-phase power and line-line ratings are given below

Part C (1x15=15)

16.  Draw and explain the step by step procedure of load flow solution for the Newton-Raphson method