Name of the College : SJB Institute of Technology
Subject Code/Name : 10EE71-Computer Techniques In Power Systems
Dept : Electrical And Electronics Engineering
Degree : B.E
SEM: : VII
Website : sjbit.edu.in
Document Type : Question Bank
Download Model Question Paper : https://www.pdfquestion.in/uploads/sjbit.edu.in/3260-EEE-VII-COMPUTER%20%20TECHNIQUES%20IN%20POWER%20%20SYSTEM%20ANALYSIS%20%5b10EE71%5d-QUESTION%20PAPER.pdf
SJB IT Computer Techniques Power Systems Question Paper
QUESTION BANK :
UNIT – 1
1. Define the following and give an illustrative example: i) tree and co-tree ii) Basic loops iii) Basic cut sets iv) primitive network v) Bus frame of reference. vi) path vii) link viii) oriented connected graph ix) primitive network Dec.2013/Jan.2014, Dec2012, Dec2011, . June/July 2011
Related : SJB Institute of Technology 12MBA32 Operations Management MBA Question Bank : www.pdfquestion.in/3278.html
2. Derive an expression for obtaining Y-bus using singular transformations. Dec.2013/Jan.2014, Dec2012
3. Given that the self impedances of the elements of a network referred by the bus incidence matrix given below are equal to: Z1=Z2=0.2, Z3=0.25, Z4=Z5=0.1 and Z6=0.4 units, draw the corresponding oriented graph, and find the primitive network matrices. Neglect mutual values between the elements. Dec.2013/Jan.2014
4. What is primitive network? Explain with circuit and equations the significance of it in both impedance and admittance forms. June/July2013, Dec2012, June/July 2011, June/July 2011
5. For the sample network-oriented graph shown in Fig.below by selecting a tree, T(1,2,3,4), obtain the incidence matrices A and Aˆ . Also show the partitioned form of the matrix-A. June/July2011, Dec 2011, June/July2013
6. For the sample-system shown in Fig. E3, obtain an oriented graph. By selecting a tree, T(1,2,3,4), obtain the incidence matrices A and Aˆ . Also show the partitioned form of the matrix-A.
7. For the network of Fig E8, form the primitive matrices [z] & [y] and obtain the bus admittance matrix by singular transformation. Choose a Tree T(1,2,3). The data is given in Table . Dec2012, June/July 2012
8. Derive the expression for Ybus using Inspection method. June/July2013
UNIT – 2
1. Obtain the general expressions for Zbus building algorithm when a branch is added to the partial network. June/July2013
2. Obtain the general expressions for Zbus building algorithm when a Link is added to the partial network. Dec2012
UNIT – 3&4
1. Using generalized algorithm expressions for each case of analysis, explain the load flow studies procedure, as per the G-S method for power system having PQ and PV buses, with reactive power generations constraints. June/July2013, Dec 2012, June/July 2011
2. Derive the expression in polar form for the typical diagonal elements of the sub matrices of the Jacobian in NR method of load flow analysis. June/July 2011.
3. Compare NR and GS method for load flow analysis procedure in respect of the following i) Time per iteration ii) total solution time iii) acceleration factor iv)number of iterations Dec.2013/Jan.2014, June/July2013, June/July 2011
4. Explain briefly fast decoupled load flow solution method for solving the nonlinear load flow equations. June/July2013, Dec 2012, June/July 2011
5. What are the assumptions made in fast decoupled load flow method? Explain the algorithm briefly, through a flow chart. Dec.2013/Jan.2014
6. Explain the representation of transformer with fixed tap changing during the load flow studies June/July 2011, May/June 2012
7. What is load flow analysis? What is the data required to conduct load flow analysis? Explain how buses are classified to carry out load flow analysis in power system. What is the significance of slack bus. Dec.2013/Jan.2014, June/July201, Dec 2012, Dec2011
8. Write a short note on i) acceleration factor in load flow solution. June/July2013, Dec2011
9. For the power system shown in fig. below, with the data as given in tables below, obtain the bus voltages at the end of first iteration, by applying GS method.
10. For the power system shown in fig. below, with the data as given in tables below, obtain the bus voltages at the end of first iteration, by applying GS method. Dec2011
11. Obtain the load flow solution at the end of first iteration of the system with data as given below. The solution is to be obtained for the following cases
(i) All buses except bus 1 are PQ Buses
(ii) Bus 2 is a PV bus whose voltage magnitude is specified as 1.04 pu
(iii) Bus 2 is PV bus, with voltage magnitude specified as 1.04 and 0.25_Q2_1.0 pu. June/July2012, Dec2011
UNIT – 5&6
1. Derive the necessary condition for optimal operation of thermal power plants with the transmission losses considered. Dec.2013/Jan.2014, Dec 2012, June/July 2011
2. What are B- coefficients? Derive the matrix form of transmission loss equation. Explain the method of equal incremental cost for the economic operation of generators with transmission loss considered. Dec.2013/Jan.2014, June/July2013, Dec 2012, Dec2011, June/July 2011
3. Explain problem formation and solution procedure of optimal scheduling for hydro thermal plants. June/July2013, Dec 2012, Dec2011
4. Explain the equal incremental cost criterion with reference to economic operation of power systems. June/July2013
5. Derive the necessary condition for optimal operation of thermal power plants without the transmission losses considered. Dec.2013/Jan.2014