Power System Simulation Lab (Formation of Y-Bus & Z-Bus Matrix) by using AU power Software

1. POWER SYSTEM SIMULATION
LAB - I
FORMATION OF BUS ADMITTANCE
AND IMPEDANCE MATRICES AND
SOLUTION OF NETWORKS

2. To understand the formation of network
matrices, the bus admittance matrix Y and
the bus impedance matrix Z of a power
network, to effect certain required changes
on these matrices and to obtain network
solution using these matrices.
AIM

3. EXERCISES
• Using AU power software for formation of bus
admittance matrix Y of a power network using
the “Two – Rule Method”.

4. ANNEXURE 3.1
3-BUS, 3-LINES POWER SYSTEM
Transmission Line Data:

5. 3-BUS, 3-LINES POWER SYSTEM
Single-Line Diagram
Base MVA = 100
1 2
3

6. i. General Data
Number of buses, number of transmission lines,
number of transformers, number of shunt
elements (capacitor / reactor) and the base
MVA of the network.

7. ii. Transmission Line Data
The following data to be read for all lines, (one line for
each transmission line)
(a)Identification number (serial number) of line
(b) Identification number of sending end and receiving end buses of
line
(c) Series impedance (R,X)of the line in per unit.
(d) Half-line-charging susceptance, Bc, in per unit.
(e) Maximum loadability limit (rating) of line in MVA

8. iii. Transformer Data
The following data to be read for all transformers (one
line for each transformer):
a.Identification number (serial number) of transformer
b. Identification number of sending end (tap side) bus and receiving
end bus of transformer.
c. Impedance (R,X) of transformer in per unit.
d. Off-nominal tap ratio
e. Maximum loadability limit (rating) of transformer in MVA

9. iv. Shunt element (capacitor / reactor)
Data
• The following data to be read for all shunt
elements (one line for each element):
a. Identification number (serial number) of the shunt
element
b. Identification number of the bus
c. Rated capacity in MVA (positive for capacitor and
negative for inductor).

10. Output Section:
(i) Student Information:
• Title of the Experiment :
• Case Title
• Name of the Student :
• Roll Number :
• Semester :
• Date of Experiment :
(ii)Input Data with proper headings :
(iii) Results with proper headings: Element value (in per
unit) of Y printed row wise.

11. STUDENT INFORMATION DATA
• TITLE OF EXPERIMENT:
FORMATION OF NETWORKS MATRICES AND SOULTION OF NETWORKS L1
Y-Z SOL MODULE L2
• CASE TITLE:
3-BUS 3-LINE SYSTEM L3
• NAME OF THE STUDENT/USER:
S.MATHAN KUMAR L4
• ROLL NUMBER:
TF / EEE / 02 L5
• SEMESTER:
ASSO. PROF (EEE) L6
• DATE OF EXPERIMENT:
22.03.2014 L7

12. SYSTEM DATA (L8)
NUMBER OF BUSES : 3
NUMBER OF TRANSMISSION LINES : 3
NUMBER OF TRANSFORMERS : 0
NUMBER OF SHUNT ELEMENTS : 0
SYSTEM BASE MVA : 100.00
*All dates are typed in ONE Single Row (Line
Number or Row Number 8)
*Each data after press Tab button and then type next
data

13. TRANSMISSION LINE DATA
(Starting From L9 t0 L11)
• LINE NUMBER
• SENDING BUS
• RECEVING BUS
• RESISTANCE (R) IN PU
• REACTANCE (X) IN PU
• HALF LINE CHARGING SUSCEPTANCE IN PU
• RATING MVA
(In Each Transmission Line having 7 Dates – This 7
dates are Typed in ONE Single Row)

14. 6-BUS, 7-LINES / TRANSFORMER
POWER SYSTEM Single-Line Diagram

15. i. General Data
• Buses : 6, numbered serially from 1 to 6
• Lines : 5, numbered serially from L1 to L5
• Transformers : 2, numbered serially as T1 and T2
• Shunt Load : 2, numbered serially as s1 and s2
• Base MVA : 100

16. Bus Data – P-V Buses:
Bus ID
No.
Generation, MW Demand Gen. Limit
MVAR
Scheduled
Volt (p.u)
Schedule Max Min MW MVAR Max Min
1 ? 200 40 0.0 0.0 100.0 -50.0 1.02
2 50.0 100 20 0.0 0.0 50.0 -25.0 1.02

17. Bus Data – P-Q Buses
Bus ID No
Demand
Volt. Mag.
Assumed (p.u)
MW MVAR
3 55.0 13.0 1.0
4 0.0 0.0 1.0
5 30.0 18.0 1.0
6 50.0 5.0 1.0

18. Transmission Line Data
Line
ID.
No
Send Bus
No.
Receive
Bus No.
Resist
P.U
Reactance
P.U.
Half Line
charging
Suscept.
P.U
Rating
MVA
1 1 6 0.123 0.518 0.0 55
2 1 4 0.080 0.370 0.0 65
3 4 6 0.087 0.407 0.0 30
4 5 2 0.282 0.640 0.0 55
5 2 3 0.723 1.050 0.0 40

19. Transformer Data
Transformer
ID.No
Send (*)
Bus No.
Receive
Bus No.
Resist.
P.U
Reactance
P.U.
Tap Ratio Rating
MVA
1 6 (*) 5 0.0 0.300 1.000 30
2 4 (*) 3 0.0 0.133 1.000 55
(*) Note: The sending end bus of a transformer should be the tap side.

20. Shunt Element Data
Shunt ID No. Bus ID. No. Rated Capacity
MVAR (*)
1 4 2.0
2 6 2.5
(*) Note: Sign for capacitor : +ve
Sign for Inductor : -ve