b) The bus admittance matrix of a simple power network is given below. Draw the single line diagram marking line parameters.
Load flow analysis
Load flow analysis is a study or numerical calculation of the power flow of power in steady-state conditions in any electrical system. It is used to determine the flow of power (real and reactive), voltage, or current in a system under any load conditions.
Nodal Matrix
The nodal matrix or simply known as admittance matrix, generally in engineering term it is called Y Matrix or Y bus, since it involve matrices so it is also referred as a n into n order matrix that represents a power system with n number of buses. It shows the buses' nodal admittance in a power system. The Y matrix is rather sparse in actual systems with thousands of buses. In the power system the transmission cables connect each bus to only a few other buses. Also the important data that one needs for have a power flow study is the Y Matrix.
Types of Buses
A bus is a type of system of communication that transfers data between the components inside a computer or between two or more computers. With multiple hardware connections, the earlier buses were parallel electrical wires but the term "bus" is now used for any type of physical arrangement which provides the same type of logical functions similar to the parallel electrical bus. Both parallel and bit connections are used by modern buses. They can be wired either electrical parallel or daisy chain topology or are connected by hubs which are switched same as in the case of Universal Serial Bus or USB.
value of x = 0.2, y = 0.8
![b)
c)
The bus admittance matrix of a simple power network is given below.
Draw the single line diagram marking line parameters.
Ybus = j
g1
Figure Q4 shows a simple 2 bus bar electric power system, with the
values of X and Y defined below
Last digit of your student number
0, 3, 6
1,4,7
2,5 8,9
g1
-3.78
1.25
2.5
0
V,<0°
1
1.25 2.50
-3.42
1.11
1.11
-4.89
1.0
1.25
Note that the values for X and Y to be used in the calculation depend on the last
digit of your student number.
All per unit quantities are on a base power of 100MVA.
The power flow problem is to be solved using the Newton-Raphson
method.
Take V₁ as the reference voltage of 1.0pu 0°, and choose the initial
voltage at Bus 2 as estimates 82 0 and |V₂| = 1.
-
Obtain the values of the Voltage at Bus 2 at the end of the 1st iteration.
Z =jX
0
1.0
1.25
-2.31]
Value of X
0.1
0.3
0.2
Value of Y
0.6
0.5
0.8
V2₂282
2
P+jQ=Y+j0.3 pu
d2
d2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F42be421e-d4ef-4e85-99d2-9423d5524514%2F12467b6c-9fb4-4410-a47a-3e69b17abe5d%2Fqwzqggn_processed.png&w=3840&q=75)
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