material ppt

1. EE 504.70
DEPARTMENT OF TECHNICAL EDUCATION
ANDHRA PRADESH.
Name : P.V.KRISHNA MURTHY
Designation : Senior Lecturer
Branch : Electrical & Electronic Engg.
Institute : G.M.R. Polytechnic., Srisailam
Year/semester : v Semester
Subject : Power systems-II
Subject code : EE 504
Topic : Distribution
Sub topic : Distributors
Duration : 50 min
Teaching Aids : ppt, diagrams.

2. EE 504.70
CLASSIFICATION OF DISTRIBUTORS
Distributor
Loading
Feeding
Concentrated loading
Uniformly distributed
loading
At unequal
voltage
Fed at one
end only
Fed at both
ends
At equal
voltage
Fed at center
Fed at any point
on ring distributor
RECAP
Fig.1

3. EE 504.70
OBJECTIVES
On the completion of this topic the student should
be able to know about the
• AC distribution
• Differences between ac distribution and dc distribution

4. EE 504.70
DISTRIBUTION
RING
FEEDERS
I1
I2
I3
A
B
C
AC DISTRIBUTION
Fig.2

5. EE 504.70
AC DISTRIBUTION
• A.C distribution is widely used in the world
• A.C distribution used for domestic consumer supply
• A.C distribution is used for all industrial consumer supply

6. EE 504.70
DISTRIBUTION
RING
FEEDERS
I1
I2
I3
A
B
C
DC DISTRIBUTION
Fig.3

7. EE 504.70
w.r.t. VS
w.r.t VL
1
Power factor
vectorically
simple arithmetic
Addition & subtraction
of V&I
R, L, C
only R
Drop in distributor
due to
AC
DC
CRITERIA
DIFFERENCES BETWEEN AC & DC
DISTRIBUTION
TABLE.1

8. EE 504.70
AC DISTRIBUTION VOLTAGES
• A.C –HT distribution voltage is 11KV
• A.C –LT 3 Phase distribution voltage is 400V
• A.C -LT 1 Phase distribution voltage is 230V

9. EE 504.70
SUMMARY
We have discuss about the
• AC distribution
• Differences between AC and DC distribution

10. EE 504.70
QUIZ
1) Distribution system used for supplying power to the
domestic
and industrial consumers is
a) AC distribution system
b) DC distribution system
c) AC and DC distribution system
d) None of the above

11. EE 504.70
QUIZ
2) Calculation of voltage drops is simple in
a) AC Distribution
b) DC Distribution
c) AC and DC Distribution
d) All of the above

12. EE 504.70
PREVIOUS EXAMINATION QUESTIONS
1.Write differences between AC and DC distribution
2.Write the advantages of AC distribution

13. EE 504.70