High Voltage Direct Current Transmission Question Bank Anna University , Chennai Electrical Engineering Department High Voltage Direct Current Transmission

High Voltage Direct Current Transmission Question Bank

Anna University , Chennai

Electrical Engineering Department

High Voltage Direct Current Transmission 

UNIT-1

 2- MARKS

1. List out the applications of HVDC?
2. What are the types of transmission system?
3. State the comparison of AC & DC transmission system?
4. State the advantages in DC transmission?
5. State the disadvantage in dc transmission?
6. What are the types of DC link?
7. What is the need of smoothing reactor?
8. What are the factors to be considered for planning of Hvdc transmission?
9. Explain in two lines about choice of voltage level in DC transmission
10. What is DC breaker? How it will be useful?
11. Name the new modern trends in DC transmission.
12. What are the power semiconductor devices used in dc transmission?
13. Draw the converter station unit in hvdc transmission
14. How will overcome the disadvantages in dc transmission?

16- MARKS

1. For a fixed power transmission explain how the economic choice of voltage level selected in dc transmission system
2. Explain the technological development in control and protection , for better performance and reliability of dc transmission system
3. What are the different applications of dc transmission system? Explain them in detail?
4. With neat sketches explain the different kinds of dc link available?
5. Explain the comparison of AC and DC transmission in detail
6. Explain the application of dc transmission
7. Explain in detail about the planning of hvdc transmission?
8. Explain the technological development of modern trends in dc transmission
9. Explain the major components of a hvdc transmission in converter station unit?
10. State the advantages and disadvantages of dc transmission system with following economics, reliability, performance..
                           

UNIT-2

2- MARKS

1. Define pulse number?
2. Draw the diagram graetz bridge circuit
3. Write the equation of ac current and dc voltage harmonics
4. What is choice of converter configuration?
5. Define peak inverse voltage?
6. Draw the schematic diagram of three & two valve conduction mode
7. Define twelve pulse converter with schematic diagram
8. What is meant by neglecting overlap in graetz in bridge circuit

16-MARKS

1. For a 3 phase 6 pulse gratez’s circuit draw the timing diagram considering overlap angle is less than 60 degree and without overlap for the following
a) Voltage across load
b) Voltage across any two pair of conduction valves
2. Explain the individual characteristics of a rectifier and an inverter with sketches
3. Draw the schematic circuit diagram of a 6 pulse gratez’s circuit and explain its principle of operation
4. Discuss in detail the effect of source inductance on hvdc system
5. Show the rating of the valve used in gratez circuit is 2.094Pd where Pd is dc power transmitted
6. Explain the effect of overlap angle on the performance of converter circuit
7. Explain the choice of converter configuration for any pulse number
8. Explain the analysis of 12 pulse converter with bridge rectifier
9. Explain the technique involved in harmonic elimination of bridge rectifier
10. Explain the analysis of two and three valve conduction mode
11. With detailed analysis of converter with steady state analysis

UNIT- 3

2- MARKS

1. Define Synchronous Condenser
2. What will be the current regulation in inverter side?
3. Define transformer tap changing
4. State the transmission characteristics with rectifier and inverter
5. Define firing angle control
6. What is uncompounded inverter?
7. What is equidistant pulse control?
8. How will you protect against dc line faults?
9. Draw the characteristics curve for inverter compounding?
10. What are the types of transformer tap changer?
11. State the features of on load tap changer?
12. Draw the characteristics curve for inverter compounding?
13. For the operating point of two characteristics. state the constant current compounding?
14. Draw the voltage current characteristics of converters with compounding?

16-MARKS

1. Explain the individual characteristics of a rectifier and an inverter with sketches
2. Explain in detail about the transformer tap changer with its types
3. Explain in detail about the converter control characteristics of hvdc system
4. Draw and explain the inverter and rectifier compounding characteristics with constant voltage and current curve.
5. Explain the uncompounded inverter with neat sketches
6. Explain in detail the concept of reactive power requirement in hvdc converters
7. Explain in detail about current regulation from the inverter side
8. With the block diagram, discuss the principle of operation of a basic power controller

UNIT-IV

2- Marks

1. Define Harmonic.
2. How harmonics are generated?
3. Write the characteristics of Harmonics?
4. Write the fundamental components of harmonics with a order of ‘h’?
5. Define AC filter?
6. Define DC Filter?
7. What are the components present in AC & DC filter?
8. What are the interference produced in the communication lines.
9. Define total harmonics distortion?
10. How can we avoid the interference occur in communication line?
11. Define Telephone influence factor.
12. What are the types of AC filters & Dc?
13. Define single tuned filter?
14. How will protect the filter?

16-Marks

1. Write short notes on the following:
 (a) Telephone influence factor
 (b) Harmonic distortion
2. What are the filter configuration that are employed for HVDC Converter station ? Give design aspect of one such filter.
3. Derive an equation for harmonic voltage and current for single tuned filter and discuss the influence of network admittance.
4. Give a detailed account of design aspects of following filters
   (a) Single tuned filter
   (b)Double tuned filter
5. It is required to eliminate harmonics of order 10 and below 10 other than fundamental in a 12 pulse converter suggest and derive an equation?
6. Explain in detail about different types of transformer tap changing.

UNIT-V

2-Marks

1. Define Dc Cables?
2. State the basic physical phenomenon arising in DC insulation?
3. What is meant by dielectric constant in DC cable?
4. Define dielectric stress?
5. Compare the economics of Dc cables with AC cables.
6. Define system simulation.
7. What is meant by HVDC system simulation?
8. Draw the block diagram of system simulation.
9. Distinguish AC cable vs DC cable transmission?
10. State the number of tools used for simulation of dynamic system.
11. What are the requirements for good simulation tool?
12. What are the two approaches are available in transient analysis of simulation?

16-Marks

1. Describe the comparison of economics of AC and DC.
2. Explain in detail about the modeling of HVDC system for digital dynamic simulation.
3. Explain in detail about HVDC system simulation
4. Describe the philosophy and tools used in HVDC simulation.
5. Explain the Dielectric stress in cables.
6. Describe the Physical phenomenon arising in DC insulation.

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HVDC Engineering (E) OCTOBER 2009 Previous Question Papers

MODEL EXAMINATION, OCTOBER 2009

7th SEMESTER, ELECTRICAL & ELECTRONICS ENGINEERING

               HVDC Engineering(E)

Time: 3 hours                                                                                     Maximum Marks: 100

PART – A

Answer all questions

1)What are the different types of DC link configuration?

2)What do you mean by pulse number?

3)Compare individual phase control and equidistant pulse control

4)Explain HVDC system control hierarchy

5)Briefly explain the basic faults that can occur in a converters

6)Explain the principles of surge arrester

7)What is Harmonic distortion factor?

8)Write short note on Dc filters

9)Compare series and parallel MTDC systems

10)Explain the operation of thyristor switched  capacitor

                                                                                                                 ( 10*4 =40 marks )

PART – B.

Answer all questions

11) What are the advantages and disadvantages of DC transmission systems over AC transmission system?

                             Or

12)Sketch Greatz circuit and explain its simplified analysis without overlap

13)a)Explain individual phase control and mention its limitations

  b)Explain how powe control is achieved automatically in HVDC systems

                        or

 14)a)Explain HVDC converter control characteristics

      b)Explain energisation and deenergistion of bridge in a DC link

15)a)explain the causes of overvoltages

      b)explain the reasons for occurrence pf arc back in thyristor valves

                                   or

16)a)Explain commutation failures in converters and protective measures taken

    b)What is misfire in DC link ?explain its effects in DC link.

17)a)Explain corona and radio interference effects in HVDC systems?

b)What are the various types of AC filters used in HVDC system

                            or

18)Explain about the functions of smoothing reactor.Briefly discuss about the different ways for location of smoothing reactor.

19)Explain different types of MTDC systems and its applications

                             Or

20)

a)Explain the operation of thyristor controlled reactor

b)Write  short notes on

          a)Sources of reactive power

          b)Static VAR systems

                                                                               ^{(12 x 5 =60 marks)}

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Electrical Engg 3RD SEMESTER Anna University Previous Question Papers & 3RD SEMESTER SYLLABUS

Electrical Engg

3RD SEMESTER PAPER

3RD SEMESTER SYLLABUS

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EE2301 POWER ELECTRONICS ANNA UNIVERSITY NOV/DEC 2011 , ANNA UNIVERSITY QUESTION PAPER for EEE,ICE DPT ...

EE2301 POWER ELECTRONICS ANNA UNIVERSITY NOV/DEC 2011 , ANNA UNIVERSITY QUESTION PAPER for EEE,ICE DPT ... 

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Fifth Semester

Electrical and Electronics Engineering

EE 2301 — POWER ELECTRONICS

(Common to Instrumentation and Control Engineering)

(Regulation 2008)

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 × 2 = 20 marks)

1. State the condition to be satisfied for the load commutation in SCR.

2. Define ‘Turn off time’ of SCR.

3. Give any two differences between single phase full converter and semi converter?

4. What is meant by line commutated inverter?

5. What are the advantages of SMPS over phase controlled rectifiers?

6. Give the uses of resonant switching.

7. What is meant by current source inverter?

8. Why is the series inverter called so?

9. What are the applications of cyclo converter?

10. What is Integral cycle control?

PART B — (5 × 16 = 80 marks)

11. (a) Describe the current commutation technique to turn off the SCR with neat sketch and waveforms. (16)

Or

(b) With neat sketch explain the turn on and turn off characteristic of SCR. (16)

12. (a) Explain the working of a three phase full converter with ‘R’ load for the firing angles of 60°, 90° and 150°. (16)

Or

(b) (i) Explain the operation of a single phase full bridge converter with RL load for continuous and discontinuous load currents. (10)

(ii) A single phase full bridge converter is connected to ‘R’ load. The source voltage is of 230 V, 50 Hz. The average load current is of 10 A. For R = 20 _ find the firing angle. (6)

13. (a) Explain the working of Buck–Boost converter with sketch and waveforms and also drive the expression for SI . (16)

Or

(b) With a neat sketch and output voltage waveforms, explain the working of full bridge SMPS. (16)

14. (a) With a neat sketch and output voltage waveforms, explain the working of three phase bridge inverter in 180 degree mode of operation. (16)

Or

(b) Discuss the different modes of operation of series resonant inverter with unidirectional switch with neat circuit diagram and waveforms. (16)

15. (a) Discuss the working of 2 stage sequence control of AC voltage controller. (16)

Or

(b) Discuss the working of a 3 phase to single phase cyclo-converter with neat voltage and current waveforms. (16)

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EE 332 – POWER ELECTRONICS Nov/Dec 2008 Question paper Fifth semester EEE Anna university

EE 332 – POWER ELECTRONICS Nov/Dec 2008 Question paper Fifth semester EEE Anna university

B.E./B.Tech. DEGREE EXAMINATION, NOV/DEC 2008

Fifth Semester

Electronics and Electronics Engineering

EE 332 – POWER ELECTRONICS

(Common to Fourth Semester Mechatronics Engineering)

Time : Three Hours Maximum: 100 marks

Answer all questions

PART A – (10x2=20marks)

1. Why is turn on time of devices less than turn off time?
2. Mention the advantages of GTo.
3. Why is the power factroe of semi converters better than the full converters?
4. What is the inversion mode of the converter?
5. State the limitations of the voltage commutated choppers.
6. Mention few applications of DC choppers.
7. What are the advantages of current source inverter over voltage source inverter?
8. What is PWM control?
9. List the merits and demerits of on – off control.
10. What are the applications of cycloconverters?

PART B – (5x16=80)

11.(a) With neat sketch explain the constructional details and working of an enhancement type power MOSFET with characteristics. (16)
(or)
(b) Explain the constructional details of IGBT with equivalent circuit and discuss its characteristics. (16)

12.(a) Draw the circuit diagram of three phase full converter with inductive load and explain its operation with relevant waveform. Derive its average output voltage. (16)
(or)
(b) (i) Discuss the effect of source inductance in a controlled rectifier. (8)
(ii) With aid of circuit diagram explain the operation of UJT firing circuit.(8)


13.(a) Draw the circuit diagram of load commutated chopper and explain its operation with relevant waveforms at various stages. (16)
(or)
(b) Explain the operation of current commutated chopper with circuit diagram and relevant waveforms at various stages. (16)

14. (a) Explain the working of series inverter with the help of circuit diagram and relevant waveforms. (16)
(or)
(b) Draw the circuit diagram of current source inverter and explain its operation with relevant waveforms. (16)

15. (a) Explain the operation of single phase half wave phase controller and single phase full wave phase controller with circuit diagrams and waveforms.(16)
(or)
(b) Draw the circuit diagram of three phase to single phase cycloconverter and explain its operation with waveforms. (16)

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Power Electronics April/May 2008 Question paper EEE Fifth semester

Power Electronics April/May 2008 Question paper EEE Fifth semester

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POWER ELECTRONICS Model question paper EEE fifth semester

POWER ELECTRONICS Model question paper EEE fifth semester

B.E. ELECTRICAL AND ELECTRONICS ENGINEERING

SEMESTER V

EE 332 - POWER ELECTRONICS

Time : 3 Hrs Max. Marks: 100

PART - A (10 x 2 = 20 Marks)

1. What are the differences between Transistor & SCR?
2. Explain latching current and holding current of thyristor.
3. What is natural or line commutation?
4. Why is power factor of semiconverter better than full converter?
5. What are the differences between free wheeling diode and feedback diode?
6. What are the main differences between voltage source inverter and current source
inverter?
7. What are the advantages and disadvantages of AC voltage controllers?
8. Explain time ratio control of choppers.
9. Draw the load voltage waveform for a = 150o.
10. Explain the principle of operation of step up chopper.

PART - B (5 x 16 = 80 Marks)

11. A dc battery is charged through a resistor R as shown in fig.1. Derive an expression
for the average value of charging current in terms of Vm, E, R on the assumption
that SCR is fired continuously.
a. For an ac source voltage of 230V, 50Hz find the value of average charging
current for R = 8O and E = 150V
b. Find the power supplied to battery and dissipated in the resistor.
c. Calculate supply PF.
Fig. 1
12.a) For three phase thyristor controlled half wave rectifier feeding load R as shown in
fig. 2. Show that the average output voltages are given by
Vo = (3v3 Vm Cos a) / 2p for 0 = a = p/6
Vo = (3/2p) Vm [1+cos (a + p/6)] for p/6 = a = 5p/6
Where Vm is the maximum value of phase voltage and a is the firing angle delay.
Fig. 2
(OR)
12.b) A half controlled 3 phase bridge rectifier is supplied at 220v from a source of
reactance 0.24O/phase. Neglecting resistance and device volt drops determine
mean load voltage for level load current of 40A at a firing delay angle of 45º and
90º.
13.a) Explain the operation of single phase modified MC Murray half bridge inverter
(OR)
13.b)i) Explain the operation of modified series inverter with neat diagram. Derive an
expression for the output frequency of the inverter.
ii) What is the difference between series and parallel inverter?
14.a) Explain the operation of voltage commutated chopper with neat diagram and
waveforms. Derive expressions for commutating capacitor (C) and commutating
inductor (L).
(OR)
14.b) For a current commutated chopper peak commutating current is twice the maximum
possible load current. The source voltage is 230V dc and main SCR turn of time is
30µsec. The circuit turn off time is twice device turn off time. For maximum load
current of 200A calculate.
(i) Values of the commutating inductor and capacitor
(ii) Maximum capacitor voltage
(iii) Peak commutating current
15.a) Explain the operation of multistage sequence control of ac voltage controllers with
neat diagram.
(OR)
15.b) Explain the operation of single phase to single phase step down cyclo converter
with voltage and current waveforms for
(i) Continuous load current
(ii) Discontinuous load current

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object oriented programming may/june 2007 Question paper EEE Fifth semester

object oriented programming may/june 2007 Question paper EEE Fifth semester

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OBJECT ORIENTED PROGRAMMING Question paper EEE Fifth semester

B.E./B.Tech. DEGREE EXAMINATION

Fourth Semester

Electrical and Electronics Engineering

EE 237 — OBJECT ORIENTED PROGRAMMING

Time : Three hours Maximum : 100 marks

Answer ALL questions.

PART A — (10 ? 2 = 20 marks)

1. Define Data abstraction with respect to C++.
2. How a class is declared?
3. Name the input and output statements in C++.
4. What is a scope resolution operator and how it can be used for global variable?
5. What are the two types of the members of the class and how are they declared?
6. What is meant by binding?
7. Can array become private member of class? How?
8. What is meant by anonymous union?
9. What is a static data member?
10. What is meant by polymorphism?

PART B — (5 ? 16 = 80 marks)

11. Describe the principal features of object–oriented programming. (16)
12. (a) (i) Illustrate the reserved word inline with two examples. (8)
(ii) Explain the constructors and destructors. (8)
Or
D 281
2 D 281
(b) Write a C++ program to implement Stack and its operations PUSH and
POP. (16)
13. (a) (i) Define Friend class and specify its importance. Explain with
suitable example. (8)
(ii) Explain the operators used for dynamic memory allocation with
examples. (8)
Or
(b) Explain operator overloading with the implementation of Complex
numbers and its numeric operations addition, subtraction, multiplication
and division. (16)
14. (a) (i) Describe functional overloading with example. (8)
(ii) Write short notes on connection and derived classes. (8)
Or
(b) Explain virtual function in C++. Describe any two applications in which
virtual functions may use. For each of these applications, specify the
parent classes and derived classes. (16)
15. (a) Write a C++ program to convert Delta network (?) to star (Y) network.
(16)
Or
(b) Partition a software development problem of your choice into classes,
sub classes, objects and methods at the highest level of design. (16)

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CS 2311 OBJECT ORIENTED PROGRAMMING NOV/DEC 2010 Question paper EEE fifth semester

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2010

Fifth Semester

Electrical and Electronics Engineering

CS 2311 — OBJECT ORIENTED PROGRAMMING

(Common to Instrumentation and Control Engineering and Electronics and

Instrumentation Engineering)

(Regulation 2008)

Time : Three hours Maximum : 100 Marks

Answer ALL questions

PART A — (10 × 2 = 20 Marks)

1. With respect to C++ distinguish 'objects' from 'classes'.
2. Write a copy constructor for class date (assume mm, dd, yy as its members).
3. What is encapsulation? Do friend functions violate encapsulation?
4. How are virtual functions declared in C++?
5. What are IO streams? Give an example.
6. What is the purpose of the STL (Standard Template Library)?
7. Give two examples for java modifiers.
8. What is the purpose of the getBytes( ) method?
9. Give a sample statement for parseInt( ) and give comments for the statement.
10. What are the two ways of creating java threads?
PART B — (5 × 16 = 80 Marks)
11. (a) Write a C++ program to perform 2D matrix operations as follows:
(i) Define class MATRIX, use appropriate constructor(s). (5)
(ii) Define methods for the following two matrix operations:
determinant and transpose. (6)
(iii) Write a main program to demonstrate the use of the MATRIX class
and its methods. (5)
Or
(b) Explain the features of object oriented programming. Describe how each
of these is implemented in C++ and Java.

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EC2311 Communication Engineering Anna University Previous Year Question Paper May/June 2012 for EEE dpt (5th Semester) ...

EC2311 Communication Engineering Anna University Previous Year Question Paper May/June 2012 for EEE dpt (5th Semester) ...

 ELECTRICAL AND ELECTRONICS ENGINEERING

Fifth Semester

EC-2311 – COMMUNICATION ENGINEERING

Time: Three hours                                                                     Maximum: 100 marks

Answer ALL questions.

PART A — (10 × 2 = 20 marks)

PART-A

1. Define Modulation index

2. State Carson’s rule

3. What is aliasing?

4. What is slope overload error?

5. Define entropy

6. Draw the NRZ and RZ waveform for the pulse stream 10101011

7. What is multiplexing?

8. What are the advantages of SDMA?

9. What is geosynchronous orbit?

10. State Snell’s law.

PART-B— (5× 16= 80 marks)

11.(a). (i) Derive an expression for the AM wave and its power relation.(8)

(ii) what are the advantages of SSB modulation technique? Explain any one method of SSB generation (8)

                                                (or)

b.(i) derive an expression for the narrow band FM wave.(8)

(ii) Explain the Armstrong method of FM generation.(8)

12.a.(i) state and prove sampling theorem(6)

(ii)Explain the generation of PWM and PPM waves.(10)

                                                                             (or)

b.(i) compare PCM and DM.(4)

(ii) Explain the DM and ADM (6)

(iii) Explain the concept of BPSK and QPSK technique in data communication.(6)

                                                                           (or)

13. a. (i) with suitable examples, explain Shannon Fano encoding Schemes (8)

(ii) Explain Huffman coding with suitable example.(8)

(Or)

14. (a) Discuss in detail about TDMA and FDMA techniques.(16)

(or)

      (b) Discuss in detail about CDMA technique and compare its performance with TDMA and FDMA (16)

15. (a) (i) Explain the satellite link budget satellite system power budget.(8)

            (ii) Explain the uplink and down link model of satellite communication system.(8)

(or)

15. (b) (i) with neat sketch explain the various blocks and its functionalities of a fiber optic communication system.(8)

          (ii) write a note on power line carrier communications. (8)

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COMMUNICATION ENGINEERING Nov/Dec 2009 Question paper EEE Fifth semester

COMMUNICATION ENGINEERING Nov/Dec 2009 Question paper EEE Fifth semester

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Communication Engineering Nov/Dec 2007 Question paper EEE Fifth semester

Communication Engineering Nov/Dec 2007 Question paper EEE Fifth semester

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EE2353 High Voltage Engineering Anna University Question Paper Nov/Dec 2011 | HVE Model question Paper 2011 | EE2353 Question Paper 2011

EE2353 High Voltage Engineering Anna University Question Paper Nov/Dec 2011 | HVE Model question Paper 2011 | EE2353 Question Paper 2011

EE2353 High Voltage Engineering Anna University Question Paper Nov/Dec 2011 , HVE Model question Paper 2011, EE2353 Anna university Question Paper 

 

Posted By R.Anirudhan

 

Anna University

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Sixth Semester

Electrical and Electronics Engineering

EE 2353 — HIGH VOLTAGE ENGINEERING

(Regulation 2008)

Time : Three hours
Maximum : 100 marks
Answer ALL questions.


PART A — (10 × 2 = 20 marks)
1. What are the causes of over voltages in power system?
2. What is counter poise wire? Give its use.
3. Write the Paschen’s law.
4. What are two main reasons for long term break down in composite dielectrics?
5. Give the specifications for standard impulse wave.
6. What are the advantages of cascaded transformer method?
7. What is Rogowski coil? Give its limitations.
8. What are the limitations of series resistance micro ammeter method?
9. What are the tests conducted on surge arrester?
10. What is insulation coordination?


PART B — (5 × 16 = 80 marks)
11. (a) (i) Give the origin and characteristics of switching surges and explain the causes of over voltage due to switching surges in EHV and UHV system. (10)
(ii) Explain the control measures for over voltage due to switching surge. (6)
Or
(b) Elaborate the discussion on protection of power system equipments using protective devices.
(16)
12. (a) Explain in detail the breakdown mechanism in non-uniform fields and phenomenon of Corona. (16)
Or
(b) (i) Describe the ageing and breakdown in composite dielectrics due to partial discharge. (8)
(ii) Describe the thermal breakdown mechanism of solid dielectrics. (8)
13. (a) (i) Explain the operation of simple voltage doubler circuit. (4)
(ii) Discuss the principle of operation of vande graff generator with neat sketch. (12)
Or
(b) (i) How the impulse current is generated using capacitor bank. Explain in detail. (8) (ii) Write a brief note on resonant transformer method. (8)
14. (a) Tabulate and explain the methods used for the measurement of high voltages and high currents. (16)
Or
(b) With neat sketch explain the sphere gap arrangement method of high voltage measurement and give the factors influencing the measurement. (16)
15. (a) Explain the power frequency and impulse voltage test conducted on bushings.
Or
(b) Discuss the dielectric power factor test and partial discharge test conducted on high voltage cables. (16) 

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EE2353 High Voltage Engineering Anna University Question Paper Nov/Dec 2011 | HVE Model question Paper 2011 | EE2353 Question Paper 2011

EE2353 High Voltage Engineering Anna University Question Paper Nov/Dec 2011 | HVE Model question Paper 2011 | EE2353 Question Paper 2011

EE2353 High Voltage Engineering Anna University Question Paper Nov/Dec 2011 , HVE Model question Paper 2011, EE2353 Anna university Question Paper 

 

Posted By R.Anirudhan

 

Anna University

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.

Sixth Semester

Electrical and Electronics Engineering

EE 2353 — HIGH VOLTAGE ENGINEERING

(Regulation 2008)

Time : Three hours
Maximum : 100 marks
Answer ALL questions.


PART A — (10 × 2 = 20 marks)
1. What are the causes of over voltages in power system?
2. What is counter poise wire? Give its use.
3. Write the Paschen’s law.
4. What are two main reasons for long term break down in composite dielectrics?
5. Give the specifications for standard impulse wave.
6. What are the advantages of cascaded transformer method?
7. What is Rogowski coil? Give its limitations.
8. What are the limitations of series resistance micro ammeter method?
9. What are the tests conducted on surge arrester?
10. What is insulation coordination?


PART B — (5 × 16 = 80 marks)
11. (a) (i) Give the origin and characteristics of switching surges and explain the causes of over voltage due to switching surges in EHV and UHV system. (10)
(ii) Explain the control measures for over voltage due to switching surge. (6)
Or
(b) Elaborate the discussion on protection of power system equipments using protective devices.
(16)
12. (a) Explain in detail the breakdown mechanism in non-uniform fields and phenomenon of Corona. (16)
Or
(b) (i) Describe the ageing and breakdown in composite dielectrics due to partial discharge. (8)
(ii) Describe the thermal breakdown mechanism of solid dielectrics. (8)
13. (a) (i) Explain the operation of simple voltage doubler circuit. (4)
(ii) Discuss the principle of operation of vande graff generator with neat sketch. (12)
Or
(b) (i) How the impulse current is generated using capacitor bank. Explain in detail. (8) (ii) Write a brief note on resonant transformer method. (8)
14. (a) Tabulate and explain the methods used for the measurement of high voltages and high currents. (16)
Or
(b) With neat sketch explain the sphere gap arrangement method of high voltage measurement and give the factors influencing the measurement. (16)
15. (a) Explain the power frequency and impulse voltage test conducted on bushings.
Or
(b) Discuss the dielectric power factor test and partial discharge test conducted on high voltage cables. (16) 


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EE2201 Measurement and Instrumentation B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EE2201 Measurement and Instrumentation                        

B.E.  Anna university APRIL / MAY 2011 Question paper

CLICK HERE 

PART 1

PART 2

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EE2203 Electronic Devices and Circuits B.E. Anna university APRIL / MAY 2011 Question paper

Anna University Chennai B.E./B.Tech

EE2203 Electronic Devices and Circuits                       

B.E.  Anna university APRIL / MAY 2011 Question paper

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PART 1

PART 2


PART 3

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