Power System-III 2018 Question Paper — Government College of Engineer…
The 2018 Power System-III previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Power System-III
- Course: Power System-III
- Branch: Electrical Engg
- Year: 2018
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt five questions in all selecting atleast two questions from each Section.
- Each question carries 20 marks.
- Use of calculator is allowed.
Questions
Questions
- Q1. Form $Y_{\text{bus}}$ by singular transformation of the network shown in figure (1). Also form $Z_{\text{bus}}$ all admittances are given in p.u. [20 marks]
- Q2. (a) Derive the expression for load flow equations and also consider the assumption for the same. (b) Draw the load flow chart for G-S method when PV buses are present. [20 marks]
- Q3. The line admittance of a 4-bus system are as under shown in fig (2): From $Y_{\text{bus}}$, compute the voltages at buses 2, 3 & 4 at the end of first iteration using G-S method, $\alpha = 1.6$. [20 marks]
- Q4. Drive the expression for NR method using rectangular and polar co-ordinates. [20 marks]
- Q5. (a) A generator is transferring power to a load through a short line. The power angle equation is $P = P_m \sin \delta$.The initial power is $P_i P_u$ when a 3-phase fault occurs at the terminals of generator. (i) Use equal area criterion to find equation for critical clearing angle and critical clearing time. (ii) Find critical clearing angle and critical clearing time if $P_m = 2 \text{ pu}$, $P_i = 1 \text{ pu}$, $H = 6 \text{ MJ/MVA}$, $f = 50 \text{ Hz}$ (b) Discuss the steady state stability, dynamic stability and transient stability. [20 marks]
- Q6. Derive the expression for swing equation and inertia constant. [20 marks]
- Q7. Explain equal area criterion and its application. [20 marks]
- Q8. (a) Derive the expression for the representation of transmission loss by $\beta$-coefficients. (b) Discuss the surge performance of transmission lines. [20 marks]
Related pages
Other years
- Power System-III 2018 question paper — end-term