A balanced 3 phase Y connected generator with negative sequence has an impedance of 0.3+j0.5 QVO and an internal voltage of 150 V/ 0 (rms). The generator feeds a balanced 3 phase Y connected load having an impedance of 24+ j35 QD. The impedance of the line connecting the generator to the load is 0.7 + jl.5 VO. The a-phase internal voltage of the generator is specified as the reference phasor. i. Construct the a-phase equivalent circuit of the system. ii. Calculate the three line currents: lar, Ibs and Iec. Calculate the three phase voltages at the load: Van, Vav and Ven Calculate the line voltages: VAB, VBc and Vca at the terminals of the load. Calculate the total complex power at the load, Sr. ii. iv. V.
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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