M.E. POWER SYSTEM ENGINEERING UNIT-I (SVC & Applications) 2 MARKS QUESTIONS

M.E. POWER SYSTEM ENGINEERING

UNIT-I (SVC & Applications) 

2 MARKS QUESTIONS

1.      Write the advantages of slope in the SVC dynamic characteristics.

2.      Compare fixed series compensation and fixed shunt compensation.

3.      What are the objectives of FACTs devices?

4.      What are the basic types of FACTs controllers?

5.      What are three basic modes of SVC control?

6.      Specify the major benefits of SVC in HVDC transmission system.

7.      Write the applications of SVC.

8.      How is voltage instability identified in the power system?

9.      Define the term Static Var Compensator (SVC).

10.  What is the best location for SVC? Justify.

11.  Draw the power angle characteristics of a two machine system with and without shunt compensation.

12.  State the advantage of linear operating characteristics of compensator.

13.  How the capacitive and inductive ranges are varied?

14.  What are the advantages of the slope in the SVC dynamic characteristics?

15.  Define ESCR?

16.  Define System gain.

17.  How to calculate the base susceptance value?

18.  How to control the contribution of TSC & TCR?

19.  Define simplistic.

20.  What are the steps including the input of generator dynamics in SVC voltage regulator?

21.  What are the objectives of SVC?

22.  What are the advantages of TSCTCR type of SVC over FC-TCR type?

23.  Define transfer function of ESCR?

24.  Define TIF and THD.

25.  Define voltage distortion factor.

26.  Define IT product.

16 MARK QUESTIONS

1.      Explain the operation of the SVC with TSC and TCR combination and derive the equations used. Also explain how the SVC is able to regulate the voltage.

2.      Explain about the IEEE basic models that are available for the SVC to represent in the stability studies.

3.      Show that with power angle curve the SVC can enhance the transient stability margin.

4.      Draw and explain the IEEE basic model 1 and model 2 for SVC control system.

5.      Explain in detail using power angle curves, how SVC enhance transient stability of a power system.

6.      Explain about the performance of SVC in controlling voltage in a power system.

7.      What are the advantages of slope in the dynamic characteristics of SVC?

8.      Briefly describe the way by which the transient stability is enhanced due to static var compensator.

9.       Explain the design of SVC voltage regulator in detail.

10.  Explain the different applications of SVC.

11.  Explain the design of SVC voltage regulator and discuss the voltage control capability of SVC.

12.  Discuss in detail about the role of SVC in improving the stability limit and enhancing the power system damping.

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M.E. POWER SYSTEM ENGINEERING UNIT-III (Thyristor Controlled Series Capacitor (TCSC) and Applications) 2 MARKS QUESTIONS:

M.E. POWER SYSTEM ENGINEERING

UNIT-III (Thyristor Controlled Series Capacitor (TCSC) and Applications)

2 MARKS QUESTIONS:

1. State objective of series compensation.
2. What are the basic types of series compensation?
3. Explain how series compensation can be used for power oscillation damping.
4. How to differ TCSC from TSR?
5. Draw the compensating voltage v/s line current characteristics of TCSC.
6. Draw the VI capability curve for single module TCSC.
7. What is the effect of TCSC in SSR problem?
8. Draw the simple model of TCSC.
9. What are the basic functions of module of TCSC?
10. Draw the basic model of TCSC.
11. Define unbalance operation in TCSC.
12. What is Bang-Bang Control?
13. How is the stability limit improved?
14. Define transient over load region and continuous region.
15. What are two major approaches of stability of an operating
16. How the variation of capacitive reactance is achieved in TCSC?
17. Draw the impedance Vs delay angle characteristics of TCSC.
18. What are the types of power scheduling control?
19. Define power swing damping control.
20. Define transient stability control.
21. Define subsynchronous damping control.
22. What are the losses in TCSC?
23. Define constant angle control.
24. What are the oscillations in series compensation?
25. What are the conditions apply for placing TCSC?

Big Questions:

1. Explain with a neat sketch and waveforms the TCSC type of series controller.
2. From the fundamental derive the expression for steady-state thyristor current when the TCSC is operating in the vernier mode.
3. Explain the constant strategy in TCSC application.
4. Explain the different modes of operation of TCSC.
5. What are the important limits that are considered in the capability characteristics of TCSC?
6. Explain variable reluctance model of TCSC and hence derive transient stability, long term stability models.
7. Explain the following controls of TCSC in its closed loop operation with their block diagrams.

                                            i.            Constant current control

                                          ii.            Constant angle control

                                        iii.            Enhanced current control

                                        iv.            Constant power control

8. With a neat block diagram, explain the different modes of operation of TCSC.
9. Enumerate the modelling of TCSC to enhance the system stability.
10. Explain the variable reactance model of TCSC with neat diagram.
11. Explain applications of TCSC.

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M.E. POWER SYSTEM ENGINEERING UNIT-IV (VOLTAGE SOURCE CONVERTER BASED FACTS CONTROLLERS) 2 MARKS QUESTIONS:

M.E. POWER SYSTEM ENGINEERING

UNIT-IV (VOLTAGE SOURCE CONVERTER BASED FACTS CONTROLLERS)

2 MARKS QUESTIONS:

1. The operation of STATCOM is based on the operation of syn. m/c as rotating synchronous Condenser explains?
2. Compare the performance of SVC and STATCOM.
3. Explain the working principle STATCOM?
4. Draw the V – I characteristics of STATCOM?
5. Draw control schemer of STATCOM & explain?
6. What are the different types of losses in STATCOM?
7. What is the function of STATCOM?
8. List any two power system performance that can be improved by STATCOM.
9. What is meant by interphase power controllers?
10. How the reactive power compensation is done using STATCOM?
11. Why there is need of hybrid VAR generators?
12. What are the different types of hybrid VAR generators?
13. Compare STATCOM with SVS?
14. Define SSSC.
15. Explain with a neat sketch and waveforms the SSSC type of series controller.
16. Give the functional control scheme for a SSSC.
17. What is IPFC?
18. What are the features of IPFC?
19. What are the advantages of use of IPFC?
20. What is the significance of DC link in the UPFC modelling?
21. What is the role in DC link in UPFC?
22. State salient features of UPFC.
23. What are the drawbacks of multiphase converters?
24. How to make line compensation in FACTs?
25. What are the constrains to operate UPFC?

Big Questions:

1. What is UPFC? Draw its circuit diagram and explain the working principle as well as control principle in detail.
2. Obtain the steady state model for STATCOM from basic equations.
3. Derive an expression for real and reactive power change made by SSSC in a power system network.
4. Explain the concept of damping the rotor angle oscillations by STATCOM and SSSC.
5. With aid of block diagram, explain the characteristics of UPFC.
6. Explain the power exchange between the STATCOM and the ac system using vector diagrm?
7. Derive steady state model and STATCOM.
8. Explain the principle of operation and applications of UPFC.
9. Explain the operation of STATCOM with an aid block diagram?
10. Describe the V-I characteristics of STATCOM?
11. Explain the modelling procedure of UPFC for power flow studies?
12. What are the various recent advancements in the UPFC design?

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M.E. POWER SYSTEM ENGINEERING UNIT-V (CO-ORDINATION OF FACTS CONTROLLERS)

M.E. POWER SYSTEM ENGINEERING

UNIT-V (CO-ORDINATION OF FACTS CONTROLLERS)

2 MARKS QUESTIONS:

1. What do you understand coordination of FACTS controllers?
2. Compare conventional methods of genetic algorithm of coordination of FACTS controllers?
3. How is the co-ordination of FACTs controllers carried out?
4. Write the significance of Modulation Index?
5. What is the need for coordination of FACTs controllers?
6. What is meant by cross over and mutation?
7. List the advantages of genetic algorithm.
8. What are the benefits of SVC-TCSC interaction in power system?
9. Specify the frequency range for the following interactions that are occurring in multiple FACTS controllers.

a)      Steady state interaction.

b)      Electromechanical oscillations.

10. What are the combinations in controller interactions?
11. Define Coordinated implies.
12. Based on the frequency ranges how the control interactions are classified?
13. Define inter-area mode oscillations.
14. What are the objectives of Electromechanical-oscillations interactions?
15. What is meant by Effective Short Circuit Ratio?
16. When the lower frequency modes are undamped?
17. What are the steps involves controller design?
18. Define term coordination.
19. What are the criteria expected for damping controllers?
20. What are the assumptions made damping enhancement?
21. What is meant by admissible uncertainties?
22. Define modal performance index.
23. Define selective modal performance index.

Big Questions:

1. Explain about SVC-SVC interaction in an interconnected power system.
2. Explain the steps that are to be followed for the coordinated turning of FACTs controllers?
3. Explain the coordination of multiple FACTs controllers using linear control techniques?
4. Describe the detail of power flow control co-ordination of FACTs controllers using genetic algorithm.
5. Explain the genetic algorithm based coordination of FACTs controllers?
6. Explain in detail the coordination of multiple FACTs controllers using any one conventional linear control techniques?
7. Explain the following interactions that are occurring in multiple FACTS controllers using frequency response of FACTS controllers.

a)      Steady state interaction.

b)      Electromechanical oscillations.

c)      Small Signal Oscillations

d)     SSR interactions

e)      High frequency Interactions

8. Explain the following linear control techniques used for coordination of multiple controllers (FACTS).

a)      Linear quadratic regulator based technique.

b)      Global coordination using nonlinear-constrained optimization.

c)      Control coordination using genetic algorithms.

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