Assignment: 5 bus 6 Line Load Flow studied and MATLAB Code

One-line diagram of a 3-phase power system is shown in Figure 1. The ratings of the various components in the system are shown in Table 1. The per-unit system base for this power system is 40 MVA, 128 kV in transmission line 1 (𝐿1). For this power system:
 Develop the per-phase, per-unit equivalent circuit, and Evaluate the bus admittance matrix 𝒀𝒃𝒖𝒔 as well as the bus impedance matrix 𝒁𝒃𝒖𝒔,
Private Electric Power Company in Oman (PECO) maintains the power system shown in Figure
2. The power system contains 05 busses, with generators attached to two of them and loads
attached to the remaining ones. The power system has 06 transmission lines connecting the
busses together, with the characteristics shown in Table 2.

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TASK 2: Here we have a five bus 6 Lines power system for which I have required to find the loading
condition if the load increase, and check the effect of inserting capacitor in the system. Below figure
showing the 5 bus 6 lines system with their corresponding parameters (Impedance, Load)
Mawaleh
G2
(Generator Bus)
0.001 + o.051j, 120MVA
0.007 + 0.035j, 225 MVA
0.007 + 0.035j, 120 MVA
G1
Bousher
0.007 + 0.035j, 220 MVA
Ruwi
(Load Bus)
Muthra
0. (L
01 o
1 a

0.Bu
05 s
1 )
j, 60 MVA
0.011 + 0.051j, 60 MVA
Seeb
(Load Bus)
(i)
I will write the MATLAB code now for blow mentioned increased in load at defined bus in
order to check for, If this load inserted into the power system, whether there is an overloading
or not, also check for the voltage drop for increase in load
Bus
Real load (MW)
Reactive load
Seeb
120
(MVaR)
80
Muthrah
100
75
Ruwi
120
120
To implement the data dictionary, one needs to first establish the necessary structures for all the base
data types and the corresponding fields
Misc.Title=’This is a sample case’;
Misc.BaseMVA=100; Misc.ConnectivityType=’BM’;
Misc.ContingencyGenMWResponse=’PC’;
Misc.DeviceRefMethod=’Number’;