Saturday, February 4, 2012

EC2042 EMBEDDED AND REAL TIME SYSTEMS QUESTION BANK | EMBEDDED AND REAL TIME SYSTEMS EC2042 ANNA UNIVERSITY QUESTION BANK | FINAL YEAR ECE 8TH SEMESTER QUESTION BANK


EC 2042 EMBEDDED AND REAL TIME SYSTEMS

QUESTION BANK
UNIT I- INTRODUCTION TO EMBEDDED COMPUTING
PART-A
1. Define a System.
2. What is an embedded system?
3. What are the typical characteristics of an embedded system?
4. What are the advantages of embedded system?
5. What are the disadvantages of embedded system?
6. What are the applications of an embedded system?
7. What are the various embedded system designs Modeling Refining (or “partitioning”)
8. What are the complicating factors in embedded design?
9. What are the real-time requirements of an embedded system?
10. What are the functional requirements of embedded system?
11. What are the main components of an embedded system?
12. Define embedded microcontroller.
13. Explain digital signal processing in embedded system continued digitization of signals increasing the role of DSP in ES.
14. What are the various classifications of embedded systems?
15. What are the two essential units of a processor on an embedded system?
16. What does the execution unit of a processor in an embedded system do?
17. Give examples for general purpose processor.
18. Define microprocessor.
19. When is Application Specific System processors (ASSPs) used in an embedded system?
20. What is the need for LCD and LED displays?
21. Define ROM image.
22. Define device driver.
23. Give some examples for small scale embedded systems.
24. Give some examples for medium scale embedded systems
25. Give some examples for sophisticated embedded systems.
PART-B
1. What is the need for IDE in an Embedded Architecture? Discuss.
2. Explain the various forms of memory and the functions assigned to them.
3. Explain the software embedded systems
4. Explain the components of exemplary embedded systems
5. Describe the architecture of a typical micro controller with a neat diagram.
6. Explain the basic processors and hardware units in the embedded system
7. Explain how software is embedded into a system
8. Explain the methods used in the embedded system on a chip
9. List the hard ware units that must be present in the embedded systems.
10. i) Explain the Exemplary applications of each type of embedded system. (8)
ii) Explain the different program layers in the embedded software and also the process of converting a “C” program into the file for ROM image with suitable block diagrams. (8)
11. Explain the Embedded System on Chip (SoC) & in VLSI circuit.
12. i) Explain the various form of memories present in a system (8)
ii) Explain the software tools in designing of an embedded system. (8)
UNIT-II- COMPUTING PLATFORM AND DESIGN ANALYSIS
PART-A
1. Define bus.
2. What are the classifications of I/O devices?
3. Give some examples for serial input I/O devices.
4. Give the steps for accomplishing input output data transfer.
5. Give the limitations of polling technique.
6. What do you meant by bus arbitration?
7. What are the two characteristics of synchronous communication?
8. What do you mean by asynchronous communication?
9. What are the characteristics of asynchronous communication?
10. What are the three ways of communication for a device?
11. Expand a) SPI b) SCI
12. What are the features of SPI?
13. Define software timer.
14. What are the forms of timer?
15. Define RTC
16. What is I2C?
17. What are the bits in I2C corresponding to?
18. What is a CAN bus? Where is it used?
19. What is USB? Where is it used?
20. What are the features of the USB protocol?
21. What are the four types of data transfer used in USB?
22. Explain briefly about PCI and PCI/X buses.
23. Mention some advanced bus standard protocols;
24. What do you meant by high speed device interfaces?
25. Mention some I/O standard interfaces.
PART-B
1. Describe the functions of a typical parallel I/O interface with a neat diagram 
2. Explain high speed I/O interfacing in detail *
3. Write short notes on
(i) Analog to digital converter
(ii) UART *
4. Explain the functions of various buses used during transfer *
5. Explain the synchronous and asynchronous communications from serial devices
6. Explain the various timer and counting devices
7. Explain the various bus structures used in embedded systems
8. Explain the sophisticated interfacing features in devices /ports
9. Explain the classification of IO devices.
10. Explain the working of timers and counters in detail.
11. Explain the serial communication using I2C, CAN, USB in detail.
12. i) Explain the parallel port devices. (8)
ii) Explain the sophisticated interfacing features in device ports.


UNIT-III PROCESS AND OPERATING SYSTEM
PART-A
1. What are the advantages of Assembly language?
2. What are advantages of high level languages?
3. Define In -line assembly
4. Mention the elements of C program.
5. What is the use of MACRO function?
6. What is the use of interrupt service routines or device drivers?
7. What are the data types available in C language?
8. Mention the data structures available in C language.
9. Explain pass by values.
10. What are the three conditions that must be satisfied by the re-entrant function?
11. Explain pass by reference.
12. Write the syntax for function pointer.
13. Define queue.
14. Define stack.
15. Define List.
16. What is Object oriented programming?
17. What are the advantages of OOPs?
18. What are the characteristics of OOPs?
19. Define Class.
20. Define NULL function.
21. What is Multiple Inheritances?
22. What is a Preprocessor Directive?
PART-B
1. i) Tabulate program elements: Macros and Functions and their uses. (8)
ii) Explain the use of pointers, NULL pointers (8)
2. i) Explain the multiple function calls in the cyclic order in the main. Also write the
advantages of building ISR queues. Explain (8)
ii) Explain the ‘C’ program compiler and cross compiler. (8)
3. i) Explain the optimization of memory codes. (8)
ii) Explain the Embedded programming in C++. (8)
4. Explain the function pointers, function queues and ISR queues. (16
UNIT-IV HARDWARE ACCELERATES AND NETWORKS
PART-A


1. Define process.
2. Define task and Task state.
3. Define (TCB)
4. What is a thread?
5. What are the benefits of multithreaded programming?
6. Compare user threads and kernel threads.
7. Define RTOS.
8. Define task and task rates.
9. Define Synchronization.
10. Define Inter process communication.
11. Define Semaphore.
12. What is a semaphore?
13. Give the semaphore related functions.
14. When the error will occur when we use the semaphore?
15. Differentiate counting semaphore and binary semaphore.
16. What is priority inheritance?
17. Define Message Queue.
18. Define Mailbox and Pipe.
19. Define Socket.
20. Define Remote Procedure Call.
21. Define thread cancellation & target thread.
22. What are the different ways in which a thread can be cancelled?
23. What is preemptive and non-preemptive scheduling?
24. What is a Dispatcher?
25. What is dispatch latency?
26. What are the various scheduling criteria for CPU scheduling?
27. Define throughput?


PART-B
1. Explain how thread and process are used in embedded system.
2. Explain process management and memory management in embedded system
3. Explain file system organization and implementation
4. Explain how interrupt routines handled in embedded system
5. Explain the real time operating systems
6. Explain cyclic scheduling with time slicing
7. Explain how critical section in handled by a pre-emptive scheduler
8. Explain interprocess communication and synchronization
9. Explain interprocess communications using signals
10. Explain remote procedure call with an example
11. Write about IPC in detail.
UNIT-V CASE STUDY
PART-A
1. Name any two important RTOS.
2. What is sophisticated multitasking embedded system?
3. Explain multi task and their functions in embedded system.
4. Give the function for sending a queue.
5. Give the steps to destroy a message queue.
6. Give the needs for memory management.
7. Name some application for the VxWorks RTOS.
8. What are the various features of VxWorks?
9. What are the basic functions of VxWorks?
10. What are the task service functions supported by VxWorks?
11. What are the different types of semaphores in vxworks? Which is the fastest?
12. Name any four interrupt service functions supported by Vx Works?
13. What is signal servicing function?
14. Define Micro C/OSII.
15. What are the task states in MICRO C/OS-II?
16. What are the 2 source files in Micro C/OS-II?
17. What are the basic functions of MUCOS?


PART-B
1. Explain detail about Memory allocation related functions
2. Explain briefly about mailbox related functions
3. Explain Queue related functions
4. Explain multiple tasks and their functions
5. Give the steps for creating list of tasks
6. Give the exemplary coding techniques
7. List and explain the various task service functions in VxWorks/MUCOS-II.
8. Explain how IPCs are used in embedded system.
9. Explain the various multiple function calls in Embedded C
10. Write in detail about MUCOS and it’s features with a suitable example.
11. Write in detail about VxWorks and it’s features with a suitable example.
12. How will you design a application for Automatic Chocolate Vending Machine in detail. (Write with design and code.)


EC2045 SATELLITE COMMUNICATION QUESTION BANK |SATELLITE COMMUNICATION QUESTION EC2045 ANNA UNIVERSITY QUESTION BANK | FINAL YEAR ECE 8TH SEMESTER QUESTION BANK


EC2045-SATELLITE COMMUNICATION
UNIT – I SATELLITE ORBITS
PART - A
1. Define Satellite Communication.
2. What is Satellite?
3. State Kepler’s first law.
4. State Kepler’s second law.
5. State Kepler’s third law.
6. Define apogee and perigee.
7. What is line of apsides?
8. Define ascending node and descending node.
9. Define Inclination.
10. Define mean anomaly and true anomaly.
11. Mention the apogee and perigee height.
12. What is meant by azimuth angle and look angles?
13. Give the 3 different types of applications with respect to satellite systems.
14. Mention the 3 regions to allocate the frequency for satellite services.
15. Give the types of satellite services.
16. What is mean by DOMSAT, INTELSAT, SARSAT?
17. Define polar-orbiting satellites.
18. Give the advantage of geostationary orbit.
19. Write short notes on station keeping.
20. What are the geostationary satellites?
21. What is sun transit outage?
PART-B
1. (a) Explain about frequency allocations for satellite services. (10)
(b) Explain about U.S Domsats. (6)
2. Discuss briefly the development of INTELSAT starting from the 1960s through the
present. (16)
3. What is meant by polar orbiting? Explain in detail. (16)
4. State Kepler’s three laws of planetary motion. Illustrate in each case their relevance to artificial satellites orbiting the earth. (16)
5. Explain in detail the geocentric-equatorial coordinate system which is based on the
earth’s equatorial plane. (16)
6. Explain in detail about topocentric-horizon coordinate system which is based on the
observer’s horizon plane. (16)
7. Explain in detail about various measure of time. (16)
UNIT – II SPACE SEGMENT AND LINK DESIGN
PART-A
1. Give the two segments of basic satellite communication.
2. Write short notes on attitude control system.
3. What is declination?
4. What is meant by payload?
5. What is meant by transponder?
6. Write short notes on station keeping.
7. What is meant by Pitch angle?
8. What is an propellant?
9. What is an Yaw and zero ‘g’?
10. Describe the spin stabilized satellites.
11. What is meant by frequency reuse?
12. What is meant by spot beam antenna?
13. What is meant by momentum wheel stabilization?
14. What is polarization interleaving?
15. Define S/N ratio.
16. What is noise weighting?
17. What is noise power spectral density?
18. What is an inter modulation noise?
19. What is an antenna loss?
20. Define sky noise.
21. Define noise factor.
22. What is TWTA?
23. What is an OMT?
PART-B
1. Explain in detail about antenna look angles and the polar mount antenna. (16)
2. Explain about Earth eclipse of satellite and sun transit outage. (16)
3. Explain about launching orbits. (16)
4. Explain what is meant by satellite attitude and briefly describe two forms of attitude
Control . (16)
5. Draw the block diagram of TT&C and explain its blocks. (16)
6. Describe briefly the most common type of high-power amplifying device used aboard a communication satellite. (16)
7. Explain about wideband receiver and advanced Tiros-N spacecraft. (16)
8. Describe briefly the antenna subsystem and Anik-E. (16)
9. Explain in detail about thermal control and Morelos. (16)
UNIT – III SATELLITE ACCESS
PART-A
1. What is a single mode of operation?
2. What are the methods of multiple access techniques?
3. What is an CDMA?
4. What is SCPC?
5. What is a thin route service?
6. What is an important feature of Intelsat SCPC system?
7. What is an TDMA? What are the advantages?
8. What is preamble?
9. Define guard time.
10. What is meant by decoding quenching?
11. What is meant by direct closed loop feedback?
12. What is meant by feedback closed loop control?
13. Define frame efficiency.
14. What is meant by digital speech interpolation?
15. What is meant by telephone load activity factor?
16. What are the types of digital speech interpolation?
17. What is meant by freeze out?
18. What is DSI?
19. What are the advantages of SPEC method over DSI method?
20. Define satellite switched TDMA?
21. What is SS / TDMA?
22. What is processing gain?
23. What is burst code word?
24. What is meant by burst position acquisition?
25. What is an single access?
26. What is an multiple access technique?
27. What is meant by frequency reuse?
28. What is meant by space division multiple access?
29. What is an error detecting code?
30. What are the limitations of FDMA-satellite access?
31. Write about pre-assigned TDMA satellite access.
32. Write about demand assigned TDMA satellite access.
PART-B
1. Explain with an example the type of traffic route where single access is used. (16)
2. Explain in detail about FDMA and show how this differs from FDM. (16)
3. Explain in detail the operation of a preassigned SCPC network. (16)
4. Explain in detail the operation of the spade system of demand assignment. What is the function of the common signaling channel? (16)
5. Describe the general operating principles of a TDMA network. Show how the
transmission bit rate is related to the input bit rate. (16)
6. Explain the need for reference burst and preamble and postamble in a TDMA
System . (16)
7. Explain in detail about network synchronization with neat sketch. (16)
8. Define and explain the terms carrier recovery, bit-time recovery, traffic data, frame efficiency and channel capacity. (16)
9. Explain in detail about speech interpolation and prediction. (16)
10. Explain in detail about satellite switched TDMA. (16)
11. Describe briefly about on board signal processing for FDMA/TDM operation. (16)
12. Describe in your own words how signal acquisition and tracking are achieved in a
DS/SS system . And also derive the expression for maximal sequence. (16)
13. Explain the principle behind spectrum spreading and dispreading and how this is
used to minimize interference in a CDMA system. Also determine the throughput
efficiency of the system. (16)
UNIT – IV EARTH SEGMENT
PART-A
1. Define earth segment.
2. Give the difference between KU-band and the C-band receive only systems.
3. What is mean by ODU and IDU.
4. Explain about MATV system.


5. Write about CATV system.
6. Define S/N ratio.
7. What is noise weighting?
8. What is an EIRP?
9. What is noise power spectral density?
10. What is an inter modulation noise?
11. What is an antenna loss?
12. Define noise factor.
13. A satellite downlink at 12 GHz operates with a transmit power of 6 W and an antenna gain of 48.2 dB. Calculate the EIRP in dBW.
14. The range between a ground station and a satellite is 42000 km. Calculate the free
space loss a frequency of 6 GHz.
15. An antenna has a noise temperature of 35 K and it is matched into a receiver which has a noise temperature of 100 K. Calculate the noise power density and the noise power for a BW of 36 MHz.
16. Define Saturation flux density.
17. Write the equations of losses for clear sky conditions.
18. What are the types of antenna losses?
19. Define sky noise.
20. What is an Apsorptive n/w?
PART-B
1. With the aid of a block schematic, briefly describe the functioning of the receive
only home TV systems. (16)
2. Describe and compare the MATV and CATV systems. (16)
3. With the relevant expression explain in detail about transmission losses. (16)
4. Explain the classifications of system noise temperature. (16)
5. Explain uplink satellite circuit. (16)
6. Explain downlink satellite circuit. (16)
7. Describe briefly about the rains effects. (16)
8. Explain about inter-satellite link. (16)
UNIT – V SATELLITE APPLICATIONS
PART-A
1. Give the 3 different types of applications with respect to satellite systems.
2. Mention the 3 regions to allocate the frequency for satellite services.
3. Give the types of satellite services.
4. What is mean by DOMSAT, INTELSAT, SARSAT?
5. What are the applications of Radarsat?
6. What is ECEF?
7. What is dilution of precision?
8. What is PDOP?
8. What is DBS?
9. Give the frequency range of US DBS systems with high power satellites.
10. Give the frequency range of US DBS systems with medium power satellites.
11. What is DTH?
12. Write about bit rates for digital television.
13. Give the satellite mobile services.
14. What is GCC and GEC?
15. What is INMARSAT?
16. List out the regions covered by INMARSAT.
17. What is INSAT?
18. List out the INSAT series.
19. What is GSM?
20. What is GPRS?
21. Define DAB.
22. What is DVB?
23. What is GRAMSAT?
PART-B
1. Describe briefly the video compression process used in MPEG-2. (16)
2. Explain about indoor and outdoor unit of home receiver. (16)
3. Explain about frequencies and polarization, transponder capacity and bit rates for
digital television. (16)
4. Explain in detail about satellite mobile services. (16)
5. Describe the operation of typical VSAT system. State briefly where VSAT systems and find widest applications. (16)
6. Describe the main features of Radarsat. Explain what is meant by dawn to dusk orbit and why the Radarsat follows such on orbit. (16)
7. Explain why a minimum of four satellites are visible at an earth location utilizing the GPS system for position determination. What does the term dilution of precision refer to?
8. Describe the main features and services offered by the orbcomm satellite system.
How do these services offered by geostationary satellites and terrestrial cellular systems?

EE2028 POWER QUALITY QUESTION BANK |POWER QUALITY EE2028 ANNA UNIVERSITY QUESTION BANK | FINAL YEAR EEE 8TH SEMESTER QUESTION BANK


EE2028– Power Quality

UNIT I
INTRODUCTION TO POWER QUALITY
PART – A
1. What is Power Quality?
2. How can Power Quality problems be detected?
3. What are Harmonics?
4. What are the various power quality issues?
5. Classify power quality events in long duration events and shout duration events.
6. Differentiate between sag and swell.
7. Mention the types of sag.
8. What are the causes of sags?
9. Define Waveform Distortion.
10. What are the components of waveform distortion?
11. Define Total harmonic distortion and mention the formula used to calculate THD.
12. Define Total Demand Distortion (TDD).
13. Define for the following terms :( i) DC offset, (ii) Inter harmonics, (iii) Voltage Flicker
14. List any four standards available in power quality.
PART – B
1. (a)What are the major power quality issues? Explain in detail (8)
(b)Define power quality? Explain the reasons for increased concern in power quality. (8)
2. Explain the various types of power quality disturbances and impacts of powerquality. (16)
3. (a) Discuss the following characteristics of power quality events
(i) Short duration variations.
(ii) Long duration variations. (8)
(b)Discuss in detail about transients. (8)
4. Discuss in detail about sags and swells. (16)
5. Explain for the following related with Power quality.
(i) Voltage imbalance (ii) Under voltage (ii) Over voltage (iv) Frequency variation (16)
6. Define waveform distortion? Explain the waveform distortion categories. (16)
7. What is harmonics? Explain harmonic distortion with relevant waveforms (16)
8. Explain the following:
(i)Total harmonic distortion (ii) Total demand distortion (16)
9. (a)Write the various IEEE and IEC power quality standards. (8)
(b)Explain the following event based disturbances:
(i)Dip
(ii)Swell
(iii)Transients (8)
10. Discuss about the computer Business Equipment Manufactures Associations (CBEMA).
Explain about the events described in the curve. (16)
11. With a waveform sketch, explain the terms
(i) Voltage sag
(ii) Voltage interruption
(iii)Voltage swells.
(iv) Sag with harmonics. (16)
12. Explain the following steady state disturbances.
(i)Magnitude (ii) Unbalance (iii) Harmonics (iv) Flicker. (16)


UNIT II
VOLTAGE SAGS AND INTERRUPTIONS
PART-A
1. What is Voltage Sag?
2. What are the causes of sag?
3. What are three levels of possible solutions to voltage sag and momentaryinterruption problems?
4. List some IEEE Standards Associated with Voltage Sags.
5. What are the sources of sags and Interruption?
6. Name the different motor starting methods.
7. Name any four types of sag mitigation devices.
8. Define active series compensation devices.
9. What is the main function of DSTATCOM?


 PART-B
1. (a)Discuss the sources of sags and interruption (8)
(b)Discuss in detail about the sag performance evaluation indices. (8)
2. What is the need of estimating sag performance? Explain the different methods of estimating
voltage sag performance. (16)
3. (a)Explain the sag performance evaluation methods. (8)
(b)Explain the various causes and effects of voltage sags. (8)
4. Explain the following causes of sags.
(i)Voltage sag due to motor sag
(ii)Voltage sag due to single line to ground fault.
(iii) Voltage sags due to transformer energizing. (16)
5. What are the different voltage sag mitigation techniques? Explain in details. (16)
6. (a) Explain the principle of DVR operation used for sag mitigation. (8)
(b)Discuss in detail about the active series compensator. (8)
7. (a) Explain the operation of distributed static compensator (DSTATCOM)used for sag
mitigation. (8)
(b)Explain the solid state transfer switch with the transfer operation. (8)
8. (a) Explain the procedure for estimating the sag severity indices. (8)
(b)Mention the standards associated with the voltage sag. (8)
9. Explain the system adapted to estimate the severity of the sag occurred due to various sources.(16)
10. Explain the following sag mitigation techniques.
(i) Static UPS with minimal energy storage
(ii) Backup storage energy supply
(iii) Flywheel with UPS system. (16)
11. Discuss about estimating the cost of voltage sag events. (16)


UNIT III
OVERVOLTAGES
PART-A
1. Define transient over voltages.
2. Define voltage magnification phenomena?
3. Give the various aspects of equipment specific design and protection issues for the capacitor
switching transients.
4. What are the various Causes of over voltages?
5. What is the need of surge arrestors?
6. What is metal-oxide surge-arrester?
7. What is the role of surge arrestor on shielded and unshielded transmission line?
8. Define lightning phenomena.
9. What is Ferro resonance?
10. Give the cable life equation as a function of impulses.
11. What is the need of Computer analysis tools for transient studies?
12. Give any two analysis examples available in PSCAD/EMTDC?
PART-B
1. What are transient over voltages? Explain the different types of transient over voltages. (16)
2. (a) Draw the CBEMA curve for transient over voltages and explain. (8)
(b) Explain the problems associated with Ferro resonance. (8)
3. (a) What are the different sources of transient over voltages? Discuss the capacitor switching
transient. (8)
(b)What are the important concerns for capacitor bank switching? (8)
4. Define lightning? Discuss in detail about the over voltages due to lightning and the problems
associated with it. (16)
5. (a) Explain in detail the mechanism of lightning. (8)
(b)Explain the phenomena of Ferro resonance. (8)
6. Draw the standardized waveform of the lightning induced voltage. Discuss about the wave
shape of the lightning current. (16)
7. (a) What is the need for protection against over voltages? What are the basic principles of over
voltages protection of load equipments? (8)
(b)Explain in detail about various methods to mitigate voltage swells. (8)
8. (a) Explain in detail about the surge arrestors and surge suppressors. (8)
(b)What are the advantages of surge arrestors? Discuss about the application module. (8)
9. Explain the following:
(i) Low pass filters.
(ii) Power conditioners.
(iii)Surge filters. (16)
10.(a)Explain about the underground cable system protection. (8)
(b)Explain in detail about the protection of transformers. (8)
11 (a) what are the various lightning protection of over voltage lines? Explain them. (8)
(b)Explain the use of PSCAD in analyzing the Power quality. (8)
12.(a)What are the advantages of computer analysis tools? Discuss about PSCAD and EMTP  For transient studies. (8)
(b)Discuss about the models and examples available in PSCAD/EMTDC. (8)
UNIT IV
HARMONICS
PART-A
1. Define Harmonics.
2. Define true power factor.
3. Differentiate between linear loads and non-linear loads.Linear loads:


4. What is voltage and current distortion?
5. What is total harmonic distortion?
6. What is total demand distortion?
7. Mention the harmonic effects on devices and loads.
8. Mention the harmonic sources from industrial loads.
9. State the different types of inverters.
10. What is Variable Voltage Inverter?
11. What are the objectives of IEEE standard?
12. What are the applications of active filters?
13.Give at least two IEC standards for EMC.
14. What is the need of filtering in harmonic studies?
PART-B
1. Explain briefly about fundamentals of harmonics generation and waveform distortion. (16)
2. (a) Explain in detail about classification of linear loads and non linear loads used in
harmonic studies. (8)
(b) Explain the concept of harmonic phenomena under the presence of harmonic
producing loads. (8)
3. Explain the following terms.
(i)Harmonic distortion
(ii)Current distortion
(iii)Voltage distortion (16)
4. (i)What are the two indices used in Power system? Explain about it briefly. (8)
(ii) Give the power definitions under non sinusoidal conditions. Explain briefly. (8)
5. (a).Explain briefly about various harmonic characterization on power systems. (8)
(b).Explain briefly about the phenomena of how current distortion affects the voltage distortion under the presence of harmonics. (8)
6. (a) What are the general causes of harmonics in power systems. (8)
(b)What are the various causes of harmonics in distribution power system. (8)
7. (a) List the various effects of equipments due to harmonics. Explain briefly. (8)
(b)Explain the harmonic effects on power system equipments briefly. (8)
8. (a) What are the various classifications of harmonic sources and explain briefly about it. (8)
(b) Explain Harmonic source Identification Procedure for two source systems. (8)
9. Explain for the following:
(i) Harmonic sources from commercial loads.
(ii) Harmonic sources from industrial loads.
(iii) Harmonic sources from residential loads. (16)
10. (a) What is the need of locating harmonic sources? (8)
(b)How will you find the harmonic sources from point of common coupling? Give the identification procedure on the basis of voltage indices. (8)
11.(a).Explain the power system response characteristics under the presence of harmonics. (8)
(b).What is the need of IEEE standards used in harmonic studies.? Give their philosophy
and objective of these standards. (8)
12. Define for the following terms related with IEEE standards.
(i)SCR (ii) Load current (iii) Short circuit current (iv)Total harmonic distortion
(v)Total demand distortion (v) PCC (16)
UNIT V
POWER QUALITY MONITORING
PART – A
1. What are the importances of power quality monitoring?
2. What are the monitoring objectives?
3. What are the requirements of monitoring for a voltage regulation and unbalance?
4. What are the requirements of monitoring for a harmonic distortion?
5. What are the Characteristics of power line monitors?
6. What is the use of oscilloscope?
7. What is Spectrum analyzer?
8. What is FFT (or) digital technique used for harmonic analysis?
9. What is tracking generator?
10. What is the purpose of SVC?
11. Mention the three elements of power quality measurement.
12. What kind of power quality parameter do we want to measure?
13. List the advantages of automatic power quality monitoring system.
14. Classify the power quality monitoring.
15. What are the basic categories of power quality instruments?
16. What is flicker meter?
17. What is meant by power quality monitoring?
18. What are the specifications of power quality measuring equipments?
19. What are the necessary measurements to be made to know about the power quality of a product?
20. What is meant by online power quality monitoring?
21. What is the need for FFT Spectrum analyzer in power quality analyzers?
PART-B
1. (a)Explain Proactive monitoring. (8)
(b)Discuss in detail about the selection of power quality monitoring sites. (8)
2. Bring out the significance of Power quality monitoring. What is the important power quality
monitoring objectives.? (16)
3. (a) Bring out the important characteristics of power quality variations. (8)
(b)Explain the steps involved in power quality monitoring. What are the information from
monitoring site surveys. (8)
4. Write short notes on power quality measurement system.
What are the characteristics of power quality measurement equipments? (16)
5. Explain the harmonic analyzer and disturbance analyzer. (16)
6. (a) Explain in detail about Flicker meter. (8)
(b) Application of expert system for power quality monitoring. (8)
7. What are the various instruments used for power quality measurements?
What are the factors to be considered when selecting the instruments? (16)
8. Discuss in detail about the instruments used for analyzing non sinusoidal voltage and currents. (16)
9. (a)Explain the modern power quality monitors. (8)
(b)Draw and explain the functional structure of expert systems. (8)
10. Draw the block diagram of advanced power quality monitoring systems. Explain it. (16)