Example: A 10 MVA, 3-phase, Y-connected, two-pole, 60 Hz, 13.8 KV, line to line turbo generator has air-gap characteristic depicted in the following data: O.C.C. Vph : 2700 , 5500', 7200 , 8200 , 8800 , 9400 , 9600 , 9900 , 10200
Q: A three phase, 60Hz, 20 MVA, 12 kV, 8 pole Y-connected synchronous generator has per phase…
A: Given Data: frequency = 50 Hz power = 20 MVA voltage = 12 kV pole = 8 Ra/ph = 0.1 Pf = 0.8 leading
Q: Q: (A): Draw the general per-phase equivalent circuit of a two-winding (2-phase) motor, based on the…
A: to explain symmetrical stator winding
Q: A 380V, 50H2, A-connected, 6-pole SG has a per-phase synchronous reactance of 0.8Q. Its full- load…
A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…
Q: A 400V, 50Hz, Y-connected, 4-pole synchronous generator has a per-phase synchronous reactance of 0.5…
A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…
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Q: A three-phase, 12-kV, 60 Hz, 6 pole wye connected synchronous generator has synchronous reactance of…
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Q: A three-phase Y-connected synchronous generator is rated 120 MVA, 13.2 kV, 0.8 PF lagging, and 60…
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Q: A 3-phase synchronous generator is connected to an infinite bus with line-to-line voltage of 8660.3V…
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Q: A 760-kVA, 2300-V, three-phase, Y-connected, synchronous generator is operated at its rated speed to…
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Q: A 45-MVA, 41.57-kV, three-phase round-rotor synchronous generator has a synchronous reactance of 9…
A: The Generating system is given as Generator rating are given asS=45MVA,VLrated=41.57kV,Since, load…
Q: a) Two thermal generator units have the following incremental cost curves then determine the…
A: The incremental cost functions are given as F1=0.22+0.16 P1F2=0.48+0.41 P2and Unit 1:…
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A: consider the given question;
Q: Problem 1: A 3-phase, Y connęcted, round rotor synchronous generator rated at 10kVA, 230V has a…
A: The solution can be achieved as follows.
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Q: Athree-phase, 60-Hz, 500-MVA, 11.8-kV, 4-pole steam turbine-generating unit has an H constant of 6…
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Q: A 50-MVA. 30-KV. three-phase synchronous generator has a synchronous reactance of 9 Ohms/phase and…
A: In this question we need to find a maximum power delivered by genrator and armature current.
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Q: A 3-phase, 11 kV, 10 MVA synchronous generator is connected to a load that has a power factor of…
A: PART (1): The circuit of the question can be drawn as: Given, Power rating (S)=10 MVA(VT)line=11…
Q: 02. Assume that a 10 MVA, 13.8 kV (line), 3-phase, Y-connected AC generator has R= 0.05 Q per phase…
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Q: A 3 phase, 415V, 50HZ, Delta connected synchronous machine, is operating as a synchronous capacitor…
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Q: A 50-MVA, 30-kV. three-phase synchronous generator has a synchronous reactance of 9 Ohms/phase and…
A: we need to determine maximum generated power and armature current.
Q: A three-phase, 250 MVA, 16 kV rated synchronous generator is feeding into an infinite bus bar at 15…
A: Synchronous generator rating 250MVA and 16 kV Synchronous reactance=1.62 up and E=24 kV a)The line…
Q: Q4. The open-circuit and short-circuit test readings for a three-phase, Y-connected, 1 MVA, 2 kV,…
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Q: A three-phase, 60-Hz, 500-MVA, 11.8-kV, 4-pole steam turbine-generating unit has an H constant of 6…
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Q: Example: A do MVA, 3-phase, Y-connected, two-pole, Go HZ, 13.8 KV, Line - to-Line turbogenerator has…
A: Given rating v= 13.8kv P=10 MVA…
Q: 3.A single phase AC generator has an armature winding resistance and reactance of 0.25 ohm and 2.5…
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Q: Example 34.6. A 3-6 induction motor having a star-connected rotor has an induced e.m.f. of 80 volts…
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Q: orrect or dislike clear answer The equivalent synchronous reactance of a 10kVA 230V three-phase…
A: Given synchronous generator with 10 KVA,230 v Synchronous reactance xs=1.2 ΩArmature resistance…
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Q: Q-1. A 3 phase, 0.8 MVA, 3.3 kV, star - connected synchronous generator has 5 N/phase synchronous…
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Q: A three-phase synchronous generator is rated 60 MVA, 11 kV. It has an armature resistance ra = 0.1…
A: a Choosing Vb=11 V and MVAb=60 MVAZd=0.1+j1.65 pu=1.653∠86.53V=1111= 1 per…
Q: A 100kVA, 480V, 60Hz, Y-connected synchronous generator was tested with a rated field current of 8A…
A: Given: A 100kVA, 480V, 60Hz, Y-connected synchronous generator was tested with a rated field current…
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A: Given data, S = 5000 kVA f = 50 Hz N = 1500 rpm V = 6600 V Xs = 0.15 pu Poles = 4
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A: as per the guidelines, we need to solve only first question. in this question we have to find out…
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Q: Q-2. B. A 2 MVA, 3-phase, 8-pole alternator runs at 750 r.p.m and operates in parallel with other…
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Q: Determine the number of poles, the slip, and the frequency of the rotor currents at rated load foi…
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A: Note: We are authorized to answer three subparts at a time since you have not mentioned which part…
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Q: A 60-MVA, 69.3 kV, 3-phase synchronous generator has a synchronous reactance of 15 Ω per phase and…
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Q: Find the per-unit sub transient current at the fault, in the generator, and in the motor
A: Find the per-unit sub transient current at the fault, in the generator, and in the motor?
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- With the same transformer banks as in Problem 3.47, Figure 3.41 shows the oneline diagram of a generator, a step-up transformer bank, a transmission line, a stepown transformer bank, and an impedan load. The generator terminal voltage is 15 kV (line-to-line). (a) Draw the per-phase equivalent circuit, aounting for phase shifts for positive-sequence operation. (b) By choosing the line-to-neutral generator terminal voltage as the reference, determine the magnitudes of the generator current, transmiss ion-line current, load current, and line-to-line load voltage. Also, find the three-phase complex power delivered to the load.Consider a three-phase generator rated 300MVA,23kV, supplying a system load of 240 MA and 0.9 power factor lagging at 230 kV through a 330MVA,23/230Y-kV step-up transformer with a leakage reactance of 0.11 per unit. (a) Neglecting the exciting current and choosing base values at the load of 100 MVL and 230 kV. Find the phasor currents IA,IB, and IC supplied to the load in per unit. (b) By choosing the load terminal voltage IA as reference, specify the proper base for the generator circuit and determine the generator voltage V as well as the phasor currents IA,IB, and IC, from the generator. (Note: Take into account the phase shift of the transformer.) (C) Find the generator terminal voltage in kV and the real power supplied by the generator in MW. (d) By omitting the transformer phase shift altogether, check to see whether you get the same magnitude of generator terminal voltage and real power delivered by the generator.A 3-phase, Y-connected, 60 Hz, 6 MVA, 13.2kV synchronous generator has a synchronous reactance of 0.9 ohms and negligible resistance. It supplies a constant power load at rated conditions at 0.83 pf lagging. At the load, the line current lags the line-to-neutral voltage by how many degrees?
- A 24,000 kVA, 17.32 kV, three-phase, 60 Hz synchronous reactance of 5 Ω/phase and negligible armature resistance. At a certain excitation, the generator delivers rated load, 0.8 pf lagging to an infinite bus bar at a line the line voltage of 17.32 kV. Determine the excitation voltage per phaseA three phase synchronous generator with negligible resistance and Xs=20 ohm has induced voltage as well as terminal voltage per phase equal to 230 V. for the load angle of 30o, power received by the bus is .........W.480V, 375 kVA, 0.8 lagging power factor Y - connected synchronous generator has synchronous reactance of 0.4 ohm and negligible armature resistance. This generator is supplying power to 480V 80KW 0.8 P.F leading , Y - connected S.M with synchronous reactance of 1.1 ohm and negligible armature resistance . The S.G is adjusted to have a terminal voltage of 480V when the motor is drawing the rated power at unity power factor . Calculate 1) the magnitudes and angles of emf for both machines. 2) if the flux of motors is increased by 10 percent, what happens to the terminal voltage of power system? What is its new value ? 3) what is the power factor of the motor at the new case.
- A power plant comprises three turbine-generators rated 1000 MW, 800 MW and 500 MW respectively. The regulation constant of each generator is 0.05 pu based on its own rating. Each unit is initially operating at one-half of its own rating, when the system load suddenly increases by 300 MW. Calculate the following:a) Per-unit area frequency response characteristic on a 1000 MW system base.b) Steady-state drop in area frequency [CR4]c) The share of the load increase on each generator.d) Total load on each generator after the increase in system load.Assume the reference power setting of each turbine is unchanged.A three-phase, 250 MVA, 16 kV rated synchronous generator is feeding into an infinite bus bar at 15 kV. The generator has a synchronous reactance of 1.62 pu. It is found that the machine excitation and mechanical power input are adjusted to give E = 24 kV and power angle δ = 30 degree. a) Determine the line current and active and reactive power fed to the generator terminal. b) The mechanical power input to the generator is increased by 20% from that in part (a) but its excitation is not changed. Find the new line current and power factor. c) With reference to part (a) current is to be reduced by 20% at the same power factor by adjusting mechanical power input to the generator and its excitation. Determine E, angle δ and mechanical power input. d) With the reduced current as in part (c), the power is to be delivered to generator terminal at unity power factor, what are the corresponding values of E and δ and also the mechanical power input to the generator. Per-unit values are given on…A three-phase, 250 MVA, 16 kV rated synchronous generator is feeding into an infinite bus bar at 15 kV. The generator has a synchronous reactance of 1.62 pu. It is found that the machine excitation and mechanical power input are adjusted to give E = 24 kV and power angle δ = 30◦. a) Determine the line current and active and reactive power fed to the generator terminal. b) With reference to part (a) current is to be reduced by 20% at the same power factor by adjusting mechanical power input to the generator and its excitation. Determine E, angle δ and mechanical power input. c) With the reduced current as in part (c), the power is to be delivered to generator terminal at unity power factor, what are the corresponding values of E and δ and also the mechanical power input to the generator. Per-unit values are given on machine rating as the base.
- a single-phase, 10-kVA, 200-V, generator has an internal impedance Z, of 2 Q. Using the ratings of the generator as base values, determine the generated per-unit voltage that is required to produce full-load current under the short-circuit condition.A three-phase, 250 MVA, 16 kV rated synchronous generator is feeding into an infinite bus bar at 15 kV. The generator has a synchronous reactance of 1.62 pu. It is found that the machine excitation and mechanical power input are adjusted to give E = 24 kV and power angle δ = 30◦. a) Determine the line current and active and reactive power fed to the generator terminal. b) The mechanical power input to the generator is increased by 20% from that in part (a) but its excitation is not changed. Find the new line current and power factor. c) With reference to part (a) current is to be reduced by 20% at the same power factor by adjusting mechanical power input to the generator and its excitation. Determine E, angle δand mechanical power input.1) A 50 Hz, 3.75 MVA, 3.18 kV, three-phase synchronous generator with rated (nominal) currentof In = 682 A has open- and short-circuit characteristic listed in Table 1 and Table 2 respectively.Determine saturated and unsaturated synchronous reactance in per-unit and in Ohms and calulateshort circuit ratio (SCR). The generator is delivering rated power at 0.95 power factor leading atthe rated therminal voltage. Using given open-circuit characteristic approximately determine thefield current under rated loading.