Exercise 1: A three-phase 3Φ transmission line has an impedance of 0.62+j35.06Ω/phase and supplies a three-phase load of 100MW with a power factor (fp) of 0.8 lagging at 200kV. Taking 100MVA and 215kV as a base, we ask: a-) Calculate the impedance of the line in p.u; b-) Calculate the current consumed by the load in p.u; c-) Calculate the load voltage in p.u

Q: The voltage at the sending side (source) of a transmission line is 1 KV (Vs = 1 KV). The voltage at…

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Q: 7. For the circuit below, calculate the value of Zz for maximum average power transfer to the load.…

A: Calculate the value of Z for maximum average power tyansfer to the load. In addition, deternmine the…

Q: A single phase mixed load of 10 kVA, 0.8 power factor (50 % PQ, 30% Z, 20% Z) lagging is connected…

A: Polynomial load model:

Q: The circuit with 3 parallel loads is explained as follows. Load1 = draws 8 kW average power and the…

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Q: For the following circuit, find (a) the load impedance required for maximum average power transfer…

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Q: For the network shown in the figure and the applied

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Q: S.2) The serial impedance of the 300 km power transmission line is 23 + j75 ohm / phase and the…

A: According to policy, attempting only three sub-section of question Per km series impedance can be…

Q: Three Impedances each of (8 – j22)N are connected in mesh across a three-phase 400V ac supply.…

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Q: An AC series circuit has R=300 ohms, L=0.90H, and C=2.0microfarad with a generator of 50V andw= 1000…

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Q: A three-phase overhead transmission line delivers 500kW at 33kV.The current flowing through the…

A: Cos of angle between voltage and current is power factor .

Q: AC Power and Power Factor 1. Two loads are connected in parallel across a 13,200-volt line. Load A…

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Q: a) Find the average power dissipated in the line shown. b) Find the capacitive reactance that when…

A: Note: Power of inductive circuit is lagging and less than 1 Power factor of capacitive circuit is…

Q: Under balanced operating conditions, consider the 3-phase complex power delivered by the 3-phase…

A: 1Real power P3ϕ is a cosine function of the total power and is given by,3 VLLILcosϕSo, it matches…

Q: Q4/ The magnitude of the line voltage at the terminals of a balanced Y-connected load is 6600 V The…

A: Given: Balanced Y-connected Load  VL=6600VLoad Impedance = (240-j70)Ω/φload is fed from a line has…

Q: Let a series RLC network be connected to a source voltage V, drawing a current I. (a) In terms of…

A: For a series RLC circuit Resistance = R, capacitive reactance = 1jωC and inductive reactance = jωL…

Q: isible power of Z1 =  |S1| = 16 kVA and at 0.8 back power factor; Visible power of Z2 = |S2| = 25…

A: Given data: S1=16 kVApf1=0.8S2=25 kVApf2=1ZW=5+j26 ΩVL=3.8 kV

Q: A impedance of Z = 20236.87° N is connected across a source with a voltage of 141.421 sin (314.159t)…

A: Given ImpedanceZ=20∠36.87° ΩVoltage V=141.421sin314.159t v

Q: %3D 3. Consider the relationship S = (V3)|VLL||ILl(cos0 + sin®), whereVu is the line voltage phase…

A: In this question we will write about complex power.

Q: Given v= 75 cos(wt +30°) V and i = 5 cos(wt -15°) A for the load impedance shown, which of the…

A: In the given questions we need to discuss about the type of load.

Q: Two balanced loads are connected to the a 240kVrms 60Hz line as shown in the figure below. Load 1…

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Q: + V1 10Vrms J50Hz 0° V1 = 10 /0° R1 100 Ω L1 160mH C1 :320μF

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Q: 0.2 ohm j1.6 ohm 0.8 ohm j3.4 ohm 79ohm j55 ohm a A 24020° 240/120° 0.2 ohm 0.8 ohm j3.4 ohm j55 ohm…

A: There is a circuit in delta connection.

Q: A 15-ŁV single-phase generator is used power to a load (ZLesd = 400+j300 Q) through a transmission…

A: Wewill find the total impedance seen from the source then we will find current(I)in the line. Using…

Q: Which of the following descriptions IS NOT correct for loads in power systems? A. The purely…

A: capacitive load will deliver reactive power to the grid.     so option C is the wrong one

Q: The load impedance  absorbs 2.5 kW and generates 5 kVAR. The sinusoidal voltage source develops 7.5…

A: Given The power absorbed by the load impedance PL=2.5 kW The reactive power generates by the load…

Q: Consider a load that has an impedance given by Z=100-j50 Ω. The current flowing through this load is…

A: Given data, The value of impedance is Z = 100-j50 Ω. The value of load current is I = 152 ∠30° A.…

Q: Given the circuit below. A 220'n U,07t 100 -v 3-4 source b B U,097$ ICA lạc 22- 30°n Determine the…

A: From the three phase system ..

Q: Problem To convert the power factor to 0.95 lagging, (given a load requiring 40kW with a power…

A: Real power P=40kWCurrent power factor = 0.84 laggingLoad voltage VL​ = 220 Vrms​Transmission line…

Q: Q) A source of 10 V and frequency 1000 KHz with internal resistance of 10 N is connected to the…

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Q: The figure below shows a single-phase load being fed by a voltage source through a transmission…

A: We will find the active power absorbed or delivered by source line and load in the following…

Q: Objective 1-Understand ac power concepts, their relationshi 10.4 The load impedance in the circuit…

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Q: In a balanced Y-Y circuit shown in Figure 5, the magnitude of the phase voltage at the source is Vp…

A: As per Bartleby guidelines we are allowed to solve only three subparts, please ask the rest again.

Q: Q1: (A) In AC circuits the phase difference between the current and voltage waveforms is very…

A: Resistors, inductors and capacitors form an integral part of any electrical circuit. A source,…

Q: 4.3. Consider 3 ac loads connected across a 240V ac source where: L1 absorbs 10kW at 0.8pf laggin L2…

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Q: Question NO: 1 Consider the network as shown in figure Q1. Determine the load impedance ZL for…

A: From Maximum Power Transfer Thereom

Q: 3. The voltage across a load isv( t) = 60cos (wt-10\deg) V and the current drawn by the load is i…

A: The voltage across and current through a load are given asv(t)=60cos(ωt−10∘) V, i(t)=1.5sin(ωt−40∘)…

Q: 2) Figure shows three loads connected in parallel across a 1000-V (rms), 60-Hz single-phase source.…

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Q: The actual power flow on the transmission line is 1.25 pu and the voltage at both busbars is 1.0 pu.…

A: Here, we have asked to determine the error in the power flow estimated. So, we have given the phase…

Q: The provided one-line diagram illustrates an industrial distribution system consisting of a small…

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Q: 25) Which one of the following is true of ac circuits with reactive elements? 25) A) The magnitude…

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Q: Consider the given circuit. Determine the total reactive power delivered the load and total reactive…

A: Concept: 1) When all the impedances in a star networks are equal, then we can convert the star…

Q: II) For the circuit shown below, the line voltage at the load side is 280 Vrms. The load absorbs 6.…

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Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.