JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisite

Power Systems and Power Electronics

Course Objectives:

• To know different terms of power quality.
• To illustrate power quality issues for short and long interruptions.
• To study of characterization of voltage sag magnitude and three-phase unbalanced voltage sag.
• To know the behavior of power electronics loads, induction motors, synchronous motor etc. by the power quality issues
• To know mitigation of power quality problems by using VSI converters.

Course Outcomes

After completion of the course, students will be able to:

• Know the severity of power quality problems in distribution system
• Understand the concept of voltage sag transformation from up-stream (higher voltages) to down- stream (lower voltage)
• Compute the power quality improvement by using various mitigating custom power devices.

UNIT - I

INTRODUCTION AND POWER QUALITY STANDARDS Introduction, Classification of Power Quality Problems, Causes, Effects and Mitigation Techniques of Power Quality Problems, Power Quality Terminology, Standards, Definitions, Monitoring and Numerical Problems.

UNIT - II

CAUSES OF POWER QUALITY PROBLEMS Introduction to Non-Linear Loads, Power Quality Problems caused by Non-Linear Loads, Analysis of Non- Linear Loads, Numerical Problems.

UNIT - III

PASSIVE SHUNT AND SERIES COMPENSATION Introduction, Classification and Principle of operation of Passive Shunt and Series Compensators, Analysis and Design of Passive Shunt Compensators for Single-Phase System, Three-Phase Three Wire System and Three-Phase Four Wire System.

UNIT - IV

ACTIVE SHUNT AND SERIES COMPENSATION Introduction to Shunt compensators: Classification of DSTATCOM’s, Principle of Operation of DSTATCOM. Different Control Algorithms of DSTATCOM: PI Controller, I-Cosφ Control Algorithm, Synchronous

Reference Frame Theory, Single-Phase PQ theory and DQ Theory Based Control Algorithms, Analysis and

Design of Shunt Compensators, Numerical Problems.

Introduction to Series Compensators: Classification of Series Compensators, Principle of Operation of DVR. Different Control Algorithms of DVR: Synchronous Reference Frame Theory-Based Control of DVR, Analysis and Design of Active Series Compensators, Numerical Problems.

UNIT - V

UNIFIED POWER QUALITY COMPENSATORS Introduction to Unified Power Quality Compensators (UPQC), Classification of UPQCs, Principle of Operation of UPQC. Control of UPQCs: Synchronous Reference Frame Theory-Based UPQC, Analysis and Design of UPQCs, Numerical Problems.

TEXTBOOKS:

• 1. Bhim Singh, Ambrish Chandra, Kamal Al-Haddad, “Power Quality Problems and Mitigation Techniques”, Wiley Publications, 2015.
• 2. Math H J Bollen, “Understanding Power Quality Problems”, IEEE Press, 2000.

REFERENCES:

• 1. R.C. Dugan, M.F. McGranaghan and H.W. Beaty, “Electric Power Systems Quality”, New York, McGraw-Hill, 1996.
• 2. G.T. Heydt, “Electric power quality”, McGraw-Hill Professional, 2007.
• 3. J. Arrillaga, “Power System Quality Assessment”, John wiley, 2000.
• 4. G.T. Heydt,” Electric Power Quality”, 2ndEdition, West Lafayette, IN, Stars in Circle Publications,1994.
• 5. R. SastryVedamMulukutlaS.Sarma, “Power Quality VAR Compensation in Power Systems”, CRC Press.
• 6. A Ghosh, G. Ledwich,” Power Quality Enhancement Using Custom Power Devices”, Kluwer Academic, 2002. M. Tech – II Semester L T P C 3 0 0 3