A balanced three-phase, negative sequence, Y-connected generator is connected to a three-phase balanced Y-connected load. The generator has an impedance of 1.5-j1.25 Q/phase. The impedance of the line connecting the generator to the load is 2.5+jl1.25 0/phase. The phase "B" load voltage is 1520° kV. The impedance of each phase of the Y-connected load is 60-j80 Q/phase. Calculate phase voltages \(V_{an}\) at the generator. \(V_{an}=\) Volts
Q: The load's impedance is Zload = A 13.2-kV single-phase generator supplies power to a load through a…
A: Given: A 13.2-kV single-phase generator supplies power to a load through a transmission line. The…
Q: Example :- Single Phase Circuił Us = 220LO Zeg =0-9+ jo-1 zone 3 2one 1 X Cine =22 Zone 2 Tz 300kVA…
A:
Q: a balanced three phase voltage of 100v line to neutral is applied to a balanced y connected load…
A: symmetrical component are define the stability of power system . symmetrical component are three…
Q: Determine, for the lamps (incandescent and fluorescent) and motor, (a) the total current, (b) the…
A:
Q: (3 T2 Machine 1 Machine 2 Y A Two synchronous machines are connected through three-phase…
A: Given: Two synchronous machines are connected through three-phase transformers as shown in the…
Q: For a single phase network shown in the figure below, work in per-unit with 200 VA & 250 V as base…
A: In this question we need to find a load current of the given system.
Q: Q1 Figure 1 shows the online diagram of a three-phase power system. By selecting a common base of…
A: Given, Base power rating = 100 MVA Voltage rating = 22 kV Per unit rating of the generator = 0.18 pu…
Q: Solve the following problem: A THREE-PHASE GENERATOR SUPPLIES THREE LOADS IN PARALLEL BY MEANS OF A…
A:
Q: A three-phase, 3-wires CBA System alternator, sending 3-phase voltages of 339.4 volt to the lines,…
A:
Q: Two 3-phase, 6.6 kV, star-connected alternators supply a load of 3000 kW at .f. lagging. The…
A:
Q: Draw a single line per-unit impedance diagram for the system whose single line di Figure 2. The…
A:
Q: Q1/two identical, 3 phase, S.G operate in parallel to supply a load of 11MW and 11kV, 0.8 lagging…
A: Power factor: It tells how much active power is utilized by the circuit from the apparent power. The…
Q: The one-line diagram of a three-phase power system is shown in the above figure. The line impedances…
A: Bus admittance matrix calculated using line impedance as Ydiagonal=sum of all admittance connected…
Q: A three-phase, three-wire Y-Y system a balance load. The following information are given of the…
A: Given data: 3-phase, three-wire, Y-Y system with a balanced load. The impedance of each line,…
Q: Figure 1 shows a three-phase power system network comprises of synchronous generator, transformers,…
A:
Q: Example 60 MVA, 13.8 kV a balance three phase load with 0.8 lagging power factor. Determine for the…
A:
Q: The three-phase power and line-line ratings of the electric power system shown in Figure-1 are given…
A: Given: G1:82 MVA 30 kV X=10% T1:72MVA 30/300 kV X=11% T2:72MVA 300/30 kV X=11% M:62MVA 25 kV X=9%…
Q: = 200/0° A balanced Y-connected generator with terminal voltage Vn volts is connected to a…
A: Sequence component: There are three sequence components in the power system, positive sequence,…
Q: The 3-phase power and line-to-line voltage ratings of the electric power system shown in the…
A: In this question we need to find a impedance of the motor in per unit.
Q: Question 2 , Given the single line diagram of a three phase balanced system. 1) Find the per-unit…
A: The value of per unit of any quantity is defined as the average value of any unit to the base or…
Q: In 3 phase 11kVV generator having unity power factor of 100MW load and the sending and receiving end…
A: The diagram for the sending and receiving end is shown below:
Q: A three-phase generator supplies a load through a balanced line. balanced three-phase. It is known:…
A: In this question, 3 phase balance star connected generator supply to the 3 phase balance load. All…
Q: For the system shown below with x=0.9 pu, determine static limit and corresponding voltage magnitude…
A: The power system has to transmit power from the generation side to the load side. For this purpose,…
Q: The single line diagram of a three-phase power system is shown in Figure 1. Select a common base of…
A:
Q: Consider a 3-phase star-delta configuration with a generator and a 3-phase load. The generator…
A: Given data: ZL=15+j15 ΩV1=380 VV2=220 V
Q: L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1420 rpm,…
A:
Q: The three phase power and line-line ratings of the below electric power system is given below: Vm M…
A:
Q: A balanced three-phase, negative sequence, Y-connected generator is connected to a three-phase…
A: In this question, We need to determine the voltage across the generator terminal. All impedance…
Q: Q1. A balanced three-phase Y-connected generator with positive sequence has an impedance of 0.4 +…
A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: Problems 1. Two synchronous machines are connected through three phase transformer to the…
A: Given: Machine 1 and 2:100 MVA, 20kV, X1=X2=20%X0=4%, Xn=5%T1and T2:100 MVA, 20/345kV, X=8%Line:…
Q: Suppose you have a three-phase generator that provides 120 Vac per phase and works at a frequency of…
A: In delta connection line voltage is equal to phase voltage.
Q: Derive the formula for the 3 phase power produced by the generator in terms of the power angle δm,…
A: A three phase synchronous generator has, Per phase Synchronous reactance Xs=9 ohm Terminal voltage,…
Q: A power station has to meet the following load demand: LOAD A 50kW Between 10 AM and 6 PM LOAD B…
A: The solution can be achieved as follows.
Q: 1. A three-phase, three-wire Y-Y system a balance load. The following information are given of the…
A: The solution is given below
Q: 1. The one-line diagram of a three-phase power system is shown in the following Figure. V3 j26.459…
A: Base MVA = MVAb =100 MVA
Q: Single Phase equivalent Y-Y system is shown in the figure 3 below, operated by a generator with…
A: Single phase equivalent circuit as given in the circuit is shown below
Q: In figure below the rating of reactance and various components are shown. A load of 50MW at p.f.…
A: Let 100MVA and 11KV be the base in the generator circuit. accordingly the base in transmission line…
Q: If the line-to-line primary voltage and line current is 1.0 at 0 degrees, what is the secondary…
A: Wye connection: If we connect together the negative or positive terminal of the three-phase…
Q: Assume that two load impedances Z, and Z, are connected in series with respect to each other but Z,…
A:
Q: The three-phase power and line-line ratings of the electric power system shown in Figure-1 are given…
A: SAP ID=8925. Based on this we will write all the parameters of the components: G1=85MVA, 30kV,…
Q: a) Explain mathematically how to covert impedance Z per unit using new MVA and kV bas values. b) A…
A: In this question we will write how we will convert impedance from old MVA and KV to new MVA and…
Q: A balanced three-phase, negative sequence, Y-connected generator is connected to a three-phase…
A:
Q: Two impedances are supplied by Vrms, as shown in Figure 2, where Arms. The first load draws P₁ =…
A: It is given that: P1=23.2 WQ1=50 VARAssuming,V=100∠160° VI=2∠190° A
Q: A 3-phase generator possesses a synchronous reactance of 62 (line reactance between the source and…
A:
Q: A balanced three-phase source with grounded neutral has line-to-neutral voltages of 230 volts with…
A:
Q: A THREE-PHASE CIRCUIT WHERE THE BALANCED DELTA LOAD OF 36 + J54 OHMS IS SUPPLIED BY 8,602 OHMS…
A: We have given the problem THREE-PHASE CIRCUIT WHERE THE BALANCED DELTA LOAD OF 36 + J54 OHMS IS…
Q: of 0.1+j0.2 Ω, connected through transmission lines with the impedance of 0.5+j1 Ω to a load with…
A: After doing all the calculations of a, b and c considering two decimal points d and e can be…
Q: The following figure represents a simplified model of the power supply to a load centre from a…
A: Consider the base power is 500 MVA and the base voltage on the LV side of the transformer is 13.8 kV…
Q: The three phase power and line-line ratings of the below electric power system is given below: T Vm…
A: The given system is, For generator: For motor: And
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- X₂=0.1 1 XL +03 Soto X₁ = 0.2 X = 0.1 X = 0.1 Above is the one-line diagram of a simple power system. Each generator is represented by an emf behind the subtransient reactance. All impedances are expressed in per unit on a common base. All resistances and shunt capacitance are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A symmetrical fault occurs at bus 1 through a fault impedance Z, =j0.08 per unit. a) Using Thevenin's Theorem, determine the impedance to the point of fault and the fault current in per unit. b) Find the bus voltages and line currents during the fault. 2 O otoIn the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generator is connected in star with its star points grounded. The per unit impedances of each element on a 40 MVA base are given in Table 1 and the voltage levels are given in Table 2. Z [p.u.] 0 2 tööt Generator 0.01 +j0.08 p.u. L Figure 1: A section of the distribution system Transformer T1 Line V BASE [KV] 0.04 + j 0.03 + j 0.15000000000000002 0.06000000000000000 Generator Table 1: Sequence impedances (p.u. on 40 MVA base) 3 T2 181. Line 3 10 Table 2: Voltage bases (kV) Load 1 Transformer T2 Load Current A load current of 11.316 kA is flowing with a lagging power factor of 90 %. Convert this to a current vector in per-unit. IL = 0.04 + j 0.06000000000000000In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generators are connected in star with thier star points grounded. The system base is 15 MVA. The transformers all have reactances of 0.04 p.u. on this 15 MVA base. The reactances of all other elements are given in Table 1 (in 2) and the voltage levels are given in Table 2. p.u. G1 p.u. T1 jö Per-Unit Convert all values to p.u. on a 15 MVA base. Xa= p.u. Xc₂= XL = V BABE G1 2 X 9 T3 Figure 1: A section of the distribution system T1 L Table 1: Sequence reactances (2) 3 G1 L G2 0.3 0.59 0.01 4 L 9/10 10 Fault Voltage What is the voltage at bus 3 (in Volts) after the fault has occurred? Vp= V T2 5 T2 34 10/4 Table 2: Voltage bases (kV) G2 4 T3 10/9 | G2 Fault Current A three-phase fault with a fault reactance of 0.01 p.u. occurs at bus 3. Calculate the fault current flowing at the fault point in KA. Ip=-j KA So
- The reactance of a generator is given as 0.1 pu based on the generator of 17 KV, 300 MVA. Determine the pu reactance on a base of 17 KV, 250 MVA. New pu reactance is.......A three phase 500 MVA, 22 kV generator has winding reactance of 1.065 Ω. Find its per-unit reactance. a. 1.002 b. 1.1002 c. 1.2002 d. 1.3002two generators supplying a load. Generator I has a no-load frequency of 62.5 Hz and a slope Sp1 of I MW/Hz. Generator 2 has a no-load frequency of 62.0 Hz and a slope sp2 of I MW/Hz. The two generators are supplying a real load totaling 2.5 MW at 0.8 PF lagging. (a) At what frequency is this system operating, and how much power is supplied by each of the two generators? (b) Suppose an additional I-MW load were attached to this power system. What would the new system frequency be, and how much power would Gl and G2 supply now? Generator 1 VT V2 Generator 2 VTí KVAR KVAR
- Connect three single-phase transformers in Y-Y, with subtractive polarity, so that the line-to-line voltages on the primary are 30 degrees delayed to their respective line-to-line voltages on the secondary. It should show each step that is needed to make this connection (example: the phasor diagram) and should show the final connection of the three transformers including the polarity markings. Assume phase A on the primary is terminal "H1".Transkrmers phase with each bank with - adjuste 35. Three single-phase transformers, cach of 100 kVA rating, are conected in a closed-delta arrangement. If one of them is taken out, it would be possible to load the bank in such a manner that cach one is loaded to the extent of: A 86.6 kVA C. 57.7KVA B. 66.7 kVA D. 33.33 kVA when load is at unity power factor. 36. Average power factor at which V-V bank separate is A 86.6% C. 66.67% В. 73.3% D. None of these 37. Scott connections are used for: A. single-phase to three-phase transformation C. three-phase to two-phase transformation B. three-phase to single-phase transformation (D Any of the above 38. The current in low voltage winding of a 25 kVA, 6600/400 V, 50 Hz, 3-phase Y-A transformer, at full load is: A 36 A Č. 65,32 A B. 20.78 A D. 40.2 A 39. The current in high voltage winding of a 20 kVA, 2200/220 V, 50 Hz, 3-phase A-A transformer, at full load is: (A. 3.03 A C. jo.5 A B. 5.25 A D. None of above 40. The current in low voltage…If the line-to-line primary voltage and line current is 1.0 at 0 degrees, what is the secondary line- to-line voltage for the following three-phase transformers? Assume a turns ratio of N = 10. Express answer in polar form. a. Delta-to-Delta: b. Delta-to-Wye: c. Wye-to-Delta: d. Wye-to-Wye:
- Q2) A 13.2-kV single-phase generator supplies power to a load through a transmission line. The load's impedance is Ztoad 500 236.87° ohm , and the transmission line's impedance is Zine = 60 253.1° ohm. To reduce transmission line losses to 0.0103 of its losses without using the transformers design and use two transformers T1 between the generator and the transmission line and T2 between the transmission line and the load.3 X 0.1 1 2 XL = 0.2 to Eato oto O X = 0.1 X = 0.1 Above is the one-line diagram of a simple power system. Each generator is represented by an emf behind the subtransient reactance. All impedances are expressed in per unit on a common base. All resistances and shunt capacitance are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A symmetrical fault occurs at bus 1 through a fault impedance Z, =j0.08 per unit. a) Using Thevenin's Theorem, determine the impedance to the point of fault and the fault current in per unit. (2 Marks) b) Find the bus voltages and line currents during the fault. (2 Marks)Q2) A 13.2-kV single-phase generator supplies power to a load through a transmission line. The load's impedance is Zload = 500 236.87° ohm, and the transmission line's impedance is Zline = 60 253.1° ohm. To reduce transmission line losses to 0.0103 of its losses without using the transformers design and use two transformers T1 between the generator and the transmission line and T2 between the transmission line and the load.