Courses » Electrical Distribution System Analysis

Electrical Distribution System Analysis


The structure and load patterns of a power distribution system are significantly different than transmission system. In addition, distribution systems are transitioning from passive to active with the adoption of distributed generation, storage, and smart-grid technologies. Therefore, the analysis tools developed for a transmission system will not be directly applicable to a distribution network. This course shall introduce the modeling of the components (feeders, distribution transformer, regulators, capacitors, loads, distributed generation, storage, etc.) and analysis methods (load flow, short-circuit, etc.), specially developed for the distribution system.

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Final Exam (in-person, invigilated, currently conducted in India) is mandatory for Certification and has INR Rs. 1100 as exam fee

INTENDED AUDIENCE: UG and PG Students, Distribution Utility Engineers, College Teachers, and Industry Professionals

CORE/ELECTIVE: Core course for PG and Elective for UG

UG/PG: UG and PG

PREREQUISITES: Power System Analysis

INDUSTRY SUPPORT: 1. Power distribution utilities 2. Load dispatch centers 3. Distribution system equipment manufacturers

4995 students have enrolled already!!


Dr. Ganesh B. Kumbhar received the B.E. Degree in electrical engineering from Government College of Engineering, Karad in 1999, the M. Tech. Degree from the IIT-Madras in 2002, and the Ph.D. degree from the IIT Bombay in 2007. Currently, he is working as Assistant Professor at Department of Electrical Engineering, IIT-Roorkee. Previously, he has worked with Eaton Corporation Ltd., Tata Consultancy Services Ltd., and Crompton Greaves Ltd. in the areas of design and analysis of power system equipment. He has also worked as a Postdoctoral Research Scholar at the Centre for Energy System Research at Tennessee Tech. University, Cookeville, Tennessee, USA. His research interests include distribution system analysis, distributed generation planning and analysis, smart grid technologies and applications, power and distribution transformers, modeling and simulation, design and analysis.


Week 1: Structure of a distribution system
1.1 Distribution feeder configurations and substation layouts
1.2 Nature of loads 
Week 2: Approximate methods of analysis 
2.1 Computation of transformer and feeder loading 
2.2 “K” Factors, voltage drop and power loss calculations 
2.3 Distribution of loads and various geometric configurations 
Week 3, 4, 5: Modeling of distribution system  components
3.1 Overhead lines, feeders and cables
3.2 Single and three phase distribution transformers
3.3 Voltage regulators
3.4 Load models
3.5 Capacitor banks 
3.6 Distributed generation
Week 6, 7, 8: Distribution system analysis
4.1 Load flow analysis: Backward/forward sweep 
4.2 Load flow analysis: Direct approach 
4.3 Load flow analysis: Direct approach for weakly meshed systems
4.4 Load flow analysis: Gauss Implicit Z-matrix Method 
4.5 Short-circuit analysis: Sequence-components vs. phase-variable
4.6 Short-circuit analysis: LG, LLG, LLLG, and LL Faults
4.7 Short-circuit analysis: Weakly meshed system
4.8 Applications of distribution system analysis 


1. W. H. Kresting, Distribution System Modeling and Analysis, CRC Press, New York, 2002.
2. A. A. Sallam and O. P. Malik, Electric Distribution System, IEEE Press, Piscataway, NJ, 2011.
3. J. H. Teng, “A direct approach for distribution system load flow solutions,” IEEE Trans. on Power Delivery, vol. 18, no. 3, pp. 882–887, 2003;
4. Edited by B. Das, Power Distribution Automation, IET Power and Energy Series, 75, London, 2016.
5. R. F. Arritt and R. C. Dugan, “Distribution system analysis and the future smart grid,” IEEE Trans. on Industry Applications, vol. 47, no. 6, pp. 2343-2350, November/ December 2011
  • The exam is optional for a fee.
  • Date of Exams : October 07 (Sunday)
  • Time of Exams : Morning session 9am to 12 noon; Afternoon session: 2pm to 5pm
  • Exam for this course will be available in both morning & afternoon sessions.
  • Registration url: Announcements will be made when the registration form is open for registrations.
  • The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published.


  • Final score will be calculated as : 25% assignment score + 75% final exam score
  • 25% assignment score is calculated as 25% of average of Best 6 out of 8 assignments.
  • E-Certificate will be given to those who register and write the exam and score greater than or equal to 40% final score. Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Roorkee.It will be e-verifiable at nptel.ac.in/noc.