For the followng avcuit get : • The epuation of impedamce of the generator in fuction of the fregnency A the · By using voltage divisor find the math vektion_ for the vottage in resistor in function of Vp qnd fvequen cy R capacitor amd Andisis for voltage, impedances, currents and Wave forms c » that Xe = R D Deduce a value of frequency 10 Ne Vf C= 10nf f = 4 KH z
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Q: B: A compound generator is supplying a load of 120A at 220V, Ra=0.2Q, Rsh=502 and Rs=0.05 Q. Find Ea…
A: a) Calculating Ea in short shunt
Q: Q2. The O.C.C for a shunt generator at (1000 r.p.m) given by:lf(A) 0.2 0.5 1.0 1.5 2.12.4 3 4.2…
A: Given: The O.C.C for a shunt generator at (1000 r.p.m) given by: lf (A) 0.2 0.5 1.0 1.5…
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Q: Q/A230u Sepeiately-exaled de generator has the followingeccharactenstics when run at looe Lield CA).…
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A: The derivation can be achieved as follows.
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Q: 400 KVA, 400 V three-phase star connected 2p3D2 pole round rotor synchronous the leakage reactance…
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Q: 7) A R-pole, 60 Hz, 480RV, Y-conected, a vynchronsus reactance of 1.oham and nogligible resirtance.…
A: The solution can be achieved as follows.
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Q: Q2. The O.C.C for a shunt generator at (1000 r.p.m) given by:lf(A) 0.2 0.5 1.0 1.5 2.1 2.4 3 4.2…
A: Given: The O.C.C for a shunt generator at (1000 r.p.m) given by: lf (A) 0.2 0.5 1.0 1.5 2.1 2.4…
Q: X₂ = 0.2 E оздо X'a=0.3 1 10 10 XL1 = 0.3 XL2 = 0.3 V = 1.0 A 50Hz synchronous generator having…
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Q: Kust do l18 11.8 The synchronous generator in Figure 11.4 delivers 0.8 per-unit real power at 1.05…
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Q: HW (1.2): The following are the magnetic characteristics of a D.C. generator driven at 1000 r.p.m.…
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Q: 400 KVA, 400 V three-phase star connected 2p = 2 pole round rotor synchronous The leakage reactance…
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Q: (D)220V compound generator is supplying a load of 120A at 220V Ra=0.292, Rsh=500, Rs 0.05 2 find Ea…
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Q: With a D.C. generator which of the following regulation is preferred ?
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Q: A440V,22.5-hp,50Hz,3-phase,4-pole,star-connectedinductionmotorhasthefollowing impedances in ohms per…
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Q: A 20 MVA, 3-phase, star-connected, 50-Hz, salient-pole has X,= 1 p.u.; X,=0.65 p.u. and R, =0.01…
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Q: There are only two generators in a power system, and these generators supply a total load of 10 MW.…
A: According to question:
Q: 400 KVA, 400 V three-phase star connected 2p = 2 pole round rotor synchronous The leakage reactance…
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Q: If the load draws a current of 2727 A, in phase, from a generator, which of the following statement…
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Q: A 60 MVA, 69.3 KV, three-phase synchronous generator has a synchronous reactance Xs = 15 ohm/phase.…
A: VL=69.3 kVXs=15 Ωphase Vph=VL3=69.3*1033=39837.17 V IL=Iph=S3VL=60*1063*69.3*103=499.87 A
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- A load has a leading power factor. a) Is it a capacitive or inductive load? b) Is the reactive power positive or negative? c) Repeat for a load with lagging power factorSum of scattering angles in Laboratory coordinate system is always equal to * O 2n None of them О п/2Desian aproblem for wye delta transform adions Determinc the eauivalend resistance between the terminals A andA B.
- A 15-kv, 35-kVA 076PF laggny 50H2 four Pole y-connected Stea-thrbine genevaty has a Synchronons reactane of 3.5on Per phase. Ihis genevatuu is operativg in parallel with large power System (Infnite'bus). O Sketch Hhe corespouding Phasor diagrum and calcula te frr the armatune current (assume the fel Currut is unchanged ). O At the alsolute powev Possille, how much reactive Pover will this generator be supplyng a Consummg?a syn A: A sylienfonotus generator of 100 MVA, 22 kV, and 0.25 pu transient reactance supplies a motor of 50 MVA, 22 kV, and 0.2 pu transient reactance. The motor is drawing 40 MW at 0.8 power factor leading and terminal voltage of 21.9 kV. The line connecting them has a reactance of 0.05 pu on a base of 100 MVA. Find the transient currents in the generator, the motor, and the fault when a 3-ph fault occurs at the motor terminals. Take SB = 100 MVA, VB = 22 kV, and use the internal voltages %3D %3D of the machines method.A synchronous generator generates 370 V at 55 Hz when the field current is 4.4A. The e.m.f generated when the frequency is 35HZ and the field current is 2.9A is ..... .......
- 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)H* 3G zain IQ Asiacell The generator convert from PV to PQ if the active power of the generator exceed the * maxinum and minimum limits between the maximum and mimium limit equal to the load power Non of them With base voltage of 450 kV. The actual voltage of the generator is 560 kV. The magnitude voltage in the parameter of the PV generator in the nepaln software is * O 1.2444 pu O 450 kV O 124.44 % O 0.8036 pu 80.36 % Non of themIn the equivalent circuit, when the slipis 1 Cire at stert) rotor circuit has much lower impedance than magnetising eircuite At start approximates to Iph Cfull) Vph, creduced) XI+x? Cequels Xeg) can input reactive R1+RZ' CR1= Stator Resistanse & R2= Ro bor Resistance) can be obtained from the input powerand current. be obtained from the and current pawer Total real powec P=3 CIine) CR4 the) W power@y Totalabsyrbed indoctor reactive = 3E Lined. Xeq VAr. The current barake bongue is mea sored eddy O.48 Nm. The line Voltage (Vey) is 29.8V, stator current is 4.94A,Yotal (3ph) input reel power is 214.7W. The Stator phase resistance
- Q/A Generator operation dt 50 HZ, delivers 1-1 P-u. Power to an infinite busbar Throught a Networke. A Fan It accurs which reduces The maximum Transferable to 0-6 p.whereas before the fanilt This power was 1.8 p.u. and after the clearanes of the fault it is 1-3 P-4, If the inertia constant of Generator is 2.7 mil MUA, Ibtain the swing curve (0-200ms) For a fault clearance time of (100ms) (let =), Then examine the 0.05 Sec stability of the system.With a D.C. generator which of the following regulation is preferred ? None of these 100% 50% 1%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 oto