Consider the system as shown in figure Q3, supplies 100 kW at a power factor of 0.85 lagging. The real and reactive losses of the transmission-line feeder is 1.5 kW and 1.5 kvar, respectively. Find the load voltage and the real and reactive power absorbed by the load. ww- 240 20 V rms VL Load Figure Q3.
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- Discuss why power plant and distribution system engineers are concerned a. with the real power absorbed by a load; b. with the reactive power.Find the total impedance, voltage drop on the 100-ohm resistor, draw the phasor diagram of the voltage and current at R1, total power (apparent) delivered by the current source, draw the phasor diagram of the voltage and current at the source. Also, is the circuit inductive, capacitive, or neither (resistive)? please give the step-by-step solution NOTE: Polar form for Voltage & Current. Rectangular form for ImpedanceA load impedance, Zo = 10 + j 3 ohm, is connected to a source with line resistance equal to 3 ohm, as shown in the figure. Determine the average powers delivered to the load and absorbed by the line. The average powers delivered to the load and absorbed by the line are ________ and ____________ , respectively.
- Consider the circuit shown in Figure 2 below.a) Compute the phasor form of the load ZL that will absorb a maximum amount ofpower, and compute the maximum power delivered to this load. b) Show that the power delivered to the load is reduced if the load is ZL + j5.Explain why this is the case.PLEASE SOLVE THIS QUICKLY The apparent power of the load Z1 in the circuit given in the figure | S1 | = 16 kVA and at 0.8 back power factor, apparent power of Z2 load is | S2 | = 25 kVA and operates at unit power factor. The loads are connected to the source by ZW = 5 + j26 ohm conductive transmission line. Since the supply voltage of the loads is VL = 3.8 kV, find the apparent power seen by the source, the power coefficient and the effective value of the welding voltage.Suppose the circuit shown represents a residential distribution circuit in which the impedances of the service conductors are negligible and Vg1=Vg2=120 0° V (rms). The three loads in the circuit are L1 (a new refrigerator, a coffee maker, and a microwave oven); L2 (2 incandescent lamps, a humidifier, and a ceiling fan); and L3 (a clothes washer and a clothes dryer). Assume that all of these appliances are in operation at the same time. The service conductors are protected with 20 A circuit breakers. Will the service to this residence beinterrupted? Why or why not?
- The real power delivered by a source to two impedances, Z1=4+j5 and Z2=10 connected in parallel, is 1000 W. Determine (a) the real power absorbed by each of the impedances and (b) the source current.Under balanced operating conditions, consider the three-phase complex power delivered by the three-phase source to the three-phase load. Match the following expressions, those on the left to those on the right. (i) Realpower, P3 (a) (3VLLIL)VA (ii) Reactive power, Q3 (b) (3VLLILsin)var (iii) Total apparent power, S3 (c) (3VLLILcos)W (iv) Complex power, S3 (d) P3+jQ3 Note that VLL is the rms line-to-line voltage, IL is the rms line current, and is the power-factor angle.Consider a load impedance of Z=jwL connected to a voltage and V let the current drawn be I. (a) Develop an expression for the reactive power Q in terms of ,L, and I, from complex power considerations. (b) Let the instantaneous current be i(t)=2Icos(t+). Obtain an expression for the instantaneous power p(t) into L, and then express it in terms of Q. (c) Comment on the average real power P supplied to the inductor and the instantaneous power supplied.
- A balanced -connected impedance load with (12+j9) per phase is supplied by a balanced three-phase 60-Hz,208-V source, (a) Calculate the line current, the total real and reactive power absorbed by the load, the load power factor, and the apparent load power, (b) Sketch a phasor diagram showing the line currents, the line-to-line source voltages, and the -load currents. Use Vab as the reference.The instantaneous voltage across a circuit element is v(t)=400sin(t+30)volts, and the instantaneous current entering the positive terminal of the circuit element is i(t)=100cos(t+10)A. For both the current and voltage, determine (a) the maximum value, (b) the rms value, and (C) the phasor expression, using cos(t) as the reference.•••PF improved by 100% Convert the given load of the circuit shown into impedance bulk by using power triangle; f= 60hz. Measure the line current IL, power loss PL0, power source Ps, voltage source VS; take note of the old value of PFL; Notations IL= line current; PL0= power loss; PS= power source; VS= voltage source; PFnew= New power factor after correction; PFold= old power factor before correction