VR Line impedance Mı M1 Transformer Vs VTt М M: M2 Line impedance neutral Line impedance M3 Figure 2: Distribution lines equivalent circuit. Figure 1: Low voltage lines exiting the distribution transformer center. In the given circuit, low voltage lines are seen coming out of a distribution transformer whose Low Voltage side is star connected. R (R = 0) phase for M1 line, S (@S = 120) phase for M2 line andT (øT = -120) phase is used for M3 line. The impedances of the loads at the end of the lines are (100 + j25) N and the impedances of the lines (1 + j) N. • Calculate the voltage occurring between the ends of M1, M2 and M3 loads as the voltages between Phase-Neutral at the distribution transformer output are 230V and the voltages between Phase-Phase are read as 230/3V.
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.
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