7.8. The fuel-cost functions in $/h for three thermal plants are given by C₁ = 350 +7.20P₁ +0.0040P² C₂ = 500+ 7.30P₂ +0.0025P² 600 +6.74P3 +0.0030P² C3 = where P₁, P2, and P3 are in MW. The governors are set such that generators share the load equally. Neglecting line losses and generator limits, find the total cost in $/h when the total load is (i) PD= 450 MW

The steady-state voltage drop between the load and the sending end of the line seen in (Figure 1) is excessive Suppose that V-4950/0° V (rms). A capacitor is placed in parallel with the 192 kVA load and is adjusted until the steady-state voltage at the sending end of the line has the same magnitude as the voltage at the load end, that is, 4950 V (rms). The 192 kVA load is operating at a power factor of 0.8 lag. Part A Calculate the size of the capacitor in microfarads if the circuit is operating at 60 Hz. In selecting the capacitance, use the value that results in the lowest possible power loss in the line. Express your answer in microfarads to three significant figures. ▸ View Available Hint(s) Figure 1 of 1 202 1100 192 kVA 0.8 lag ΜΕ ΑΣΦ. 11 vec C= 22.8 Submit Previous Answers Incorrect; Try Again; 5 attempts remaining Provide Feedback ? F

a. For the circuit shown in figure 2, determine the load impedance for maximum power transfer to the load. Assume 50 22 output resistance of the function generator. b. Calculate the maximum average power transferred to the load. c. If the load is purely resistive element, what will the resistance of the load be for maximum power transfer? Function Generator Vs 2.5 KHz 5 V rms 0V DC offset Figure 2 RG! 5 mH High-Q inductor Ground Load

If the load draws a current of 2727 A, in phase, from a generator, which of the following statement is true? O A. The reactive power is flowing from generator to the load and the real power is flowing from the load to the generator. O B. Since the current is in phase with the generator voltage, both the real and reactive power is flowing from the generator to the load. O .Since the current is leading the generator, both the real and reactive power is flowing from the load to the generator. O D. The real power is flowing from generator to the load and the reactive power is flowing from the load to the generator. O E. None of the other choices are correct