Ms. Pritam Deshmukh gave a presentation on the analysis of long transmission lines. She reviewed the classification of transmission lines and the performance analysis of short transmission lines from the previous session. She then discussed the analysis of long transmission lines using the rigorous method. Specifically, she derived the ABCD constants of long transmission lines and showed that the generalized circuit constants satisfy AD-BC=1. Students then evaluated their understanding through a short quiz. The session helped students learn about the analysis of long transmission lines and the derivation of the generalized circuit parameters.

1. Marathwada Mitramandal’s
COLLEGE OF ENGINEERING
Karvenagar, Pune
Accredited with ‘A’ Grade by NAAC
Presentation
On
Subject: Power System II (303148)
by
Ms. P. D. Deshmukh
Department of Electrical Engineering

2. Unit 1: Performance of Transmission Lines
Session-2/40
Evaluation of ABCD constants and equivalent circuit
parameters of long transmission line.
Session Plan-

3. Outline:
A. Attendance
B. Review of the previous session
C. Learning Outcomes of the session
D. Content
E. Student’s evaluation of main body
F. Preparation for next session
G. Wrap up

4. B. Review of previous session:
In last session we discussed:-
 Basics of transmission line
Elements of transmission line
 Classification of Transmission lines
According to the distance transmission line is classified as:-
Short transmission line (Up to 80Km- 20kV)
Medium transmission line (80Km to 160Km- 20kV to 100kV))
Long transmission line (above 160Km-above 100kV)
 Performance analysis of Single phase Short transmission lines
Voltages and currents phasor equation
Voltage regulation and Efficiency
Losses
 Performance analysis of three phase Short transmission lines
Voltages and currents phasor equation
Voltage regulation and Efficiency
Losses

5. C. Learning Outcomes of the session:
• To do the analysis Long transmission line.
• To know about Generalized circuit constants of long transmission line

6. D. Content:
Content Learning /
Methodology
Faculty
Approach
Typical
Student
Activity
Skill/
Competency
Developed
Analysis of Long transmission line PPT, Chalk Board
Explain Understand
Critical Thinking -
Observation
Generalized circuits constants
of Long transmission Line
Chalk Board, PPT,
Experimentation
Explains, Guides Remember
Critical Thinking –
Observation

7. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
GENERALIZED CIRCUIT CONSTANT OF A
TRANSMISSION LINE

8. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
GENERALIZED CIRCUIT CONSTANT OF A
TRANSMISSION LINE

9. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
GENERALIZED CIRCUIT CONSTANT OF A
TRANSMISSION LINE

10. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
GENERALIZED CIRCUIT CONSTANT OF A
TRANSMISSION LINE

11. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
GENERALIZED CIRCUIT CONSTANT OF A
TRANSMISSION LINE

12. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
GENERALIZED CIRCUIT CONSTANT OF A
TRANSMISSION LINE

13. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
GENERALIZED CIRCUIT CONSTANT OF A
TRANSMISSION LINE

14. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
GENERALIZED CIRCUIT CONSTANT OF A
TRANSMISSION LINE

15. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
LONG TRANSMISSION LINES

16. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
ANALYSIS OF LONG TRANSMISSION LINES
(REGOROUS METHOD)

17. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
ANALYSIS OF LONG TRANSMISSION LINES
(REGOROUS METHOD)

18. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
ANALYSIS OF LONG TRANSMISSION LINES
(REGOROUS METHOD)

19. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
ANALYSIS OF LONG TRANSMISSION LINES
(REGOROUS METHOD)

20. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
ANALYSIS OF LONG TRANSMISSION LINES
(REGOROUS METHOD)

21. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES
ANALYSIS OF LONG TRANSMISSION LINES
(REGOROUS METHOD)

22. Ms. Pritam Deshmukh, Power System-II, PERFORMANCE OF
TRANSMISSION LINES

23. E. Student’s evaluation of main body
Quiz 1.2

24. • Analysis of Long transmission line
• Derive ABCD constants of long transmission
line
F. Preparation for Next Session:-

25. G. Wrap Up
In this lecture we have learned
• Analysis of Long transmission line by Rigorous Method
• Characteristic Impedance
• Propagation Constants
• Derivation of Generalized constants AD-BC=1