# Modeling, Analysis and Estimation of Three Phase Unbalanced Power Network - Institution: IIT Roorkee - Department: Electrical Engineering - Teacher: Prof. Biswarup Das - Level: Undergraduate - Language: English - Subjects: Engineering - Source: [NPTEL](https://nptel.ac.in/courses/108107477) - Licence: [CC BY-NC-SA](https://nptel.ac.in/faq) (Non-commercial use only.) - Syllabus: [at the source](https://nptel.ac.in/courses/108107477) - Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words) Traditionally, due to aggregation of large number of loads, it has been assumed that the loads drawn from the transmission network are largely balanced. However, due to increasing adoption of electric mobility (AC electric railway, electric vehicles etc.), considerable level of unbalanced loads can be drawn from the transmission network. Therefore, the traditional balanced approach for analyzing a transmission network may not be very effective analyzing an unbalanced three phase power network. In this course, modeling, analysis and quasi-steady state estimation of an unbalanced three phase power network would be discussed. Prerequisites: All compulsory UG courses on Electrical Power System and also the course on “Computer Aided Power System Analysis” available in NPTEL. ## Lectures 1. [Introduction](https://invisiblenetwork.ai/learn/nptel/108107477/317331dea737) (YouTube) 2. [Carson’s Line](https://invisiblenetwork.ai/learn/nptel/108107477/2ca8248c446c) (YouTube) 3. [Carson’s Line cont.…](https://invisiblenetwork.ai/learn/nptel/108107477/967c0be41c52) (YouTube) 4. [Three-phase Transmission Line](https://invisiblenetwork.ai/learn/nptel/108107477/c7091e87a49c) (YouTube) 5. [Three-phase Transmission Line cont.…](https://invisiblenetwork.ai/learn/nptel/108107477/f67d7b7a0245) (YouTube) 6. [Three-phase Transmission Line cont.…](https://invisiblenetwork.ai/learn/nptel/108107477/0865c0da786e) (YouTube) 7. [Three-phase Transmission Line cont.…](https://invisiblenetwork.ai/learn/nptel/108107477/ec2ec9c43d72) (YouTube) 8. [Three-phase Transmission Line cont.…](https://invisiblenetwork.ai/learn/nptel/108107477/8795da9dec7d) (YouTube) 9. [Transposition of Transmission Line](https://invisiblenetwork.ai/learn/nptel/108107477/e2408725b60d) (YouTube) 10. [Transposition of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/4ee328200923) (YouTube) 11. [Sequence impedance of Transmission Line](https://invisiblenetwork.ai/learn/nptel/108107477/79e733d29471) (YouTube) 12. [Sequence impedance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/3d280ffd8b40) (YouTube) 13. [Impedance of Transmission Line](https://invisiblenetwork.ai/learn/nptel/108107477/d58e967c1f56) (YouTube) 14. [Impedance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/d46488a89ff3) (YouTube) 15. [Impedance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/cb3c104cc559) (YouTube) 16. [Impedance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/8567807a418e) (YouTube) 17. [Impedance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/954c8f28f41d) (YouTube) 18. [Impedance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/00d6c5bef6e8) (YouTube) 19. [Impedance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/233aa30f86cc) (YouTube) 20. [Impedance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/46e5eabbbbe7) (YouTube) 21. [Capacitance of Transmission Line](https://invisiblenetwork.ai/learn/nptel/108107477/f3e3d3b17199) (YouTube) 22. [Capacitance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/dcd50ceb39d0) (YouTube) 23. [Capacitance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/cf4efbc46af0) (YouTube) 24. [Capacitance of Transmission Line cont.](https://invisiblenetwork.ai/learn/nptel/108107477/df23d4bbb1d7) (YouTube) 25. [Transformer Modeling (Introduction, YgYg0)](https://invisiblenetwork.ai/learn/nptel/108107477/530d9e42a67e) (YouTube) 26. [Transformer Modeling (YgYg0, YgYg4)](https://invisiblenetwork.ai/learn/nptel/108107477/db43273a93ac) (YouTube) 27. [Transformer Modeling (YgD1)](https://invisiblenetwork.ai/learn/nptel/108107477/045c62320b0d) (YouTube) 28. [Transformer Modeling (YgD1, YD1)](https://invisiblenetwork.ai/learn/nptel/108107477/d9c68090fb73) (YouTube) 29. [Transformer Modeling (YD1 Cont…)](https://invisiblenetwork.ai/learn/nptel/108107477/272ea3664e86) (YouTube) 30. [Transformer Modeling (YD1 Cont…)](https://invisiblenetwork.ai/learn/nptel/108107477/28350f660e46) (YouTube) 31. [Transformer Modeling (YYg0, Dd0)](https://invisiblenetwork.ai/learn/nptel/108107477/b127c0d99a60) (YouTube) 32. [Transformer Modeling (Dd0, Overall Summary)](https://invisiblenetwork.ai/learn/nptel/108107477/c9dd77889270) (YouTube) 33. [Three-Phase Load Flow (Network Modelling)](https://invisiblenetwork.ai/learn/nptel/108107477/1281f22b4da5) (YouTube) 34. [Three-Phase Load Flow (Formation of bus admittance matrix)](https://invisiblenetwork.ai/learn/nptel/108107477/72b9dee6d87c) (YouTube) 35. [Three-Phase Load Flow (Formation of bus admittance matrix cont…)](https://invisiblenetwork.ai/learn/nptel/108107477/465f0c6aac4d) (YouTube) 36. [Three-Phase Load Flow (Formation of bus admittance matrix cont…)](https://invisiblenetwork.ai/learn/nptel/108107477/5fb0839b6662) (YouTube) 37. [Three-Phase Load Flow (General expression of bus admittance matrix)](https://invisiblenetwork.ai/learn/nptel/108107477/1e9ba812d495) (YouTube) 38. [Three-Phase Load Flow (General expression of bus injected current)](https://invisiblenetwork.ai/learn/nptel/108107477/0604e282f882) (YouTube) 39. [Three-Phase Load Flow (Derivation of power flow equations)](https://invisiblenetwork.ai/learn/nptel/108107477/f923afbfa21d) (YouTube) 40. [Three-Phase Load Flow (Concept of Generator Internal Bus)](https://invisiblenetwork.ai/learn/nptel/108107477/f9402c940b5d) (YouTube) 41. [Three-Phase Load Flow (Unknown Quantities)](https://invisiblenetwork.ai/learn/nptel/108107477/cd3eede3b44b) (YouTube) 42. [Three-Phase Load Flow (Classification of Unknown Quantities)](https://invisiblenetwork.ai/learn/nptel/108107477/3aa408351961) (YouTube) 43. [Three-Phase Load Flow (Classification of Known Quantities)](https://invisiblenetwork.ai/learn/nptel/108107477/bbf6b31f242c) (YouTube) 44. [Three-Phase Load Flow (Equations Relating Known and Unknown Quantities)](https://invisiblenetwork.ai/learn/nptel/108107477/4d7d01a34564) (YouTube) 45. [Three-Phase Load Flow (NRLF Polar Method)](https://invisiblenetwork.ai/learn/nptel/108107477/32303aee7002) (YouTube) 46. [Three-Phase Load Flow (General Definitions and Dimensions of Jacobian Submatrices)](https://invisiblenetwork.ai/learn/nptel/108107477/85d924947adb) (YouTube) 47. [Three-Phase Load Flow (Derivation of J1)](https://invisiblenetwork.ai/learn/nptel/108107477/16977d1be122) (YouTube) 48. [Three-Phase Load Flow (Derivation of J1 Cont…)](https://invisiblenetwork.ai/learn/nptel/108107477/43cbf3530eb4) (YouTube) 49. [Three-Phase Load Flow (Derivation of J2)](https://invisiblenetwork.ai/learn/nptel/108107477/2dd28a81a50f) (YouTube) 50. [Three-Phase Load Flow (Derivation of J3)](https://invisiblenetwork.ai/learn/nptel/108107477/cdef4fe82443) (YouTube) 51. [Three-Phase Load Flow (Derivation of J3 Cont…)](https://invisiblenetwork.ai/learn/nptel/108107477/418f7f77b317) (YouTube) 52. [Three-Phase Load Flow (Derivation of J4, J5, J6, J7, J8)](https://invisiblenetwork.ai/learn/nptel/108107477/55e2ec12d6b9) (YouTube) 53. [Three-Phase Load Flow (Derivation of J9)](https://invisiblenetwork.ai/learn/nptel/108107477/81b852ec3354) (YouTube) 54. [Three-Phase Load Flow (Derivation of J9, J10)](https://invisiblenetwork.ai/learn/nptel/108107477/d420001f16d6) (YouTube) 55. [Three-Phase Load Flow (Derivation of J11, J12)](https://invisiblenetwork.ai/learn/nptel/108107477/b325a300a7e0) (YouTube) 56. [Three-Phase Load Flow (Derivation of J13, J14, J15 and J16, Algorithm and Example)](https://invisiblenetwork.ai/learn/nptel/108107477/8365c788b422) (YouTube) 57. [Three-Phase State Estimation (Revision of WLS State Estimation Method for Balanced Systems)](https://invisiblenetwork.ai/learn/nptel/108107477/43107498a2bc) (YouTube) 58. [Three-Phase State Estimation (Derivation of Measurement Functions for Unbalanced Systems)](https://invisiblenetwork.ai/learn/nptel/108107477/e532209b950e) (YouTube) 59. [Three-Phase State Estimation (Derivation of Measurement Functions for Unbalanced Systems Cont...)](https://invisiblenetwork.ai/learn/nptel/108107477/3c01a4c55c8f) (YouTube) 60. [Three-Phase State Estimation (General Structure of Jacobian Matrix, Example)](https://invisiblenetwork.ai/learn/nptel/108107477/47d07ca45f27) (YouTube)