Set #2 Electromechanics Question 2

2. In the single-phase AC power system shown in following figure, the AC voltage source V=11020'V supplies two loads with impedance of Z, = 302200 and Z,= 55 Z702. The switch in the figure can cut the current path to the second load. V =110Z0V Assume the switch is open and answer the following questions: a) Calculate the current flowing through Z, when the switch is open. (3 points) b) Calculate the complex power, power factor (leading or lagging), real power, and reactive power of the load. Determine whether the load receives real and reactive power from the source or deliver them to the source? (7 points) Now, assume that the switch is closed. Answer the following questions based on this assumption: c) Calculate the complex power of Z. (3 points) d) Calculate the equivalent impedance seen by the source Z,,. (2 points) e) Calculate the new current of the source. (3 points) f) Calculate the complex power, power factor (leading or lagging), real power, and reactive power of Z.,. Determine whether the load receives real and reactive power from the source or deliver them to the source? (10 points) g) Calculate the reactive power of Z2. Determine if Z2 receives reactive power or supply it. (2 points)