POWER QUALITY ELECTROMAGNETIC COMPATIBILITY AND RELIABILITY.pdf. POWER QUALITY ELECTROMAGNETIC COMPATIBILITY AND RELIABI
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Third Semester M.E. (Power & Energy Systems) Degree Examination, January 2015 (2K8 Scheme) POWER QUALITY ELECTROMAGNETIC COMPATIBILITY & RELIABILITY Time : 3 Hours
Max. Marks : 100
Instruction : Answer any five full questions. 1. a) Define power quality. With neat sketches explain the different types of power quality problems. 10 b) What is an Interruption ? How is failure, Outage and Interruption Differentiated ? Give causes for long Interruptions. 10 2. a) Describe various IEEE Guides and Power Quality Standards.
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b) Discuss the different types of Transients caused in Power system. What are the causes for them ? 10 3. a) Describe the effect of harmonics on transformers and motors.
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b) What is meant by Passive Filters ? Discuss some standard passive filters used to mitigate wave form distortion.
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4. a) Describe SVC & STATCOM for improvement in reactive power requirements and hence power quality in power systems. 10 b) What is Flicker ? Discuss the causes of it and means of mitigating the same. 5. a) Explain the Basic concepts of reliability evaluation techniques with general component model.
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b) Define Electromagnetic compatibility. What are Immunity Requirements and Emission Standards of EMC ? 10 P.T.O.
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6. a) How Active Filters and designed to correct the Harmonics and Power factor ? Justify with an example.
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b) Inadequacy of grounding introduces typical PQ problems. What are they ? List some typical problems with grounding. 7. Write Explanatory notes on the following : i) PQ Bench Marking ii) CBEMA & ITIC Curves iii) Reliability Indices iv) Spread of Harmonic Distortion. –––––––––––––––––
