Your aunt living in the USA sent an appliance that has impedance equal to 10+ j3 2 at 60 Hz. She instructed you to purchase a 220 V to 110 V transformer to step down the voltage since the appliance is rated 110 V. The cord that you used to connect the 220 V side of the transformer to the convenience outlet has a total impedance of 1 + j0.5 Q. You measured the voltage at the outlet and the value is 220 Vrms. The equivalent circuit is shown below: 1Ω mu IL + (N) 220 V rms 10+j3 VL 22 220 V 110 V Solve for the voltage across the appliance and the current through it by either A. Referring the appliance to the transformer primary, OR B. Referring the source and cord impedance to the transformer secondary. Assign the convenience outlet voltage as the reference phasor, i.e. at 0°. Choose only one method above. After choosing, 1. Draw the circuit that would solve for V₁ and T. Compute all referred values and label all components. j0.5 Ω
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.
Step by step
Solved in 3 steps with 2 images
