(2)A 20 MVA, 3-phase, star-connected, 50HZ, salient pole synchronous generator with X =1 pu, X = 0.65 pu, and negligible amature resistance is delivering 15MW at power-factor 0.8 lag to an 11kV, 50HZ system. Find the load angle d and per-unit excitation voltage E under these conditions.
Q: A 700 kW, 60 Hz generator A, with 2.0% speed regulation, is operating in parallel with generator B…
A: Electric generator- An electric generator is also known as a dynamo or an alternator. It is a device…
Q: A 1000KVA, 6.6 kV 3 PHASE star connected cylindrical pole synchronous generator has 20-ohm as…
A: The circuit diagram for the synchronous generator is shown below:
Q: In a long-shunt compound generator, the terminal voltage is 220 V when generator delivers 110 A.…
A:
Q: current, load power, and power loss under this condition? 16. A 228-volt constant-potential…
A:
Q: A 100-MVA 12.5-kV 0.85-PF-lagging 50-Hz two-pole Y-connected synchronous generator has a per-unit…
A: Impedance in ohms = per unit impedance × base impedance. Internal induced voltage= terminal…
Q: Q7) A long shunt compound DC generator delivers a load current of 150A at 230V and has armature,…
A: A long shunt compound generator, Delivered current 150A. At 230V. All parameters are given. Find…
Q: Problem 4.7: A 80 MVA, 4-pole, 60-Hz synchronous generator operates at 0.90 power factor lagging.…
A: In this question we need to find a inertia constant H.
Q: A 1000 kVA, 6.6 kV, 3-phase star connected cylindrical pole synchronous generator has a synchronous…
A: Given values are - S=1000kVAVt=6.6kVXs=20ohmUnity power factor.cosϕ=1
Q: (2)A 20 MVA, 3-phase, star-connected, 50HZ, salient pole synchronous generator with X; =1 pu, X =…
A:
Q: A three-phase Y-connected synchronous generator has rated values of 90 MVA, 15 kV, 0.6 reverse power…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: A 3-phase, Y connected, round rotor synchronous generator rated at 8KVA, 220V has a Synchronous…
A: Given synchronous generator details are S=8kVAVL=220V Synchronous reactance per phase is Xs=1Ω.…
Q: QUESTION 1:- (a) A 4-pole, 3-phase, star-connected, 50 Hz synchronous generator, with a…
A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…
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 480 V, 50 Hz, Y-connected six-pole synchronous generator has a per-phase synchronous reactance of…
A: The synchronous generator is rotating at the synchronous speed. Thus, the speed of the rotation of…
Q: A 200 MVA, three-phase, wye-connected, 60 Hz, 21 kV synchronous generator has negligible armature…
A:
Q: A 3-phase, Y connected, round rotor synchronous generator rated at 12kVA, 240V has a Synchronous…
A:
Q: A 70-MVA, 69.3-kV, three-phase round-rotor synchronous generator has a synchronous reactance of 14…
A: (1) KVL equation to the above system Given rating of the machine is 70MVA power factor 0.87lag…
Q: A 200 MVA, 25 kV, cylindrical rotor, synchronous generator has a saturated synchronous reactance of…
A: Here synchronous generator with 200 MVA and Vt =25kV is given. And synchronous reactance is given…
Q: 3) Three-phase, delta connected, 50HZ, 26 kVA, 400 Volt cylindrical pole synchronous generator is…
A: The synchronous generator is also called an alternator, it is the most widely used AC generator in…
Q: Question 3: A 3-phase, 11 kV, 10 MVA synchronous generator is connected to a load that has a power…
A: An alternator/Synchronous generator is a type of electrical machine that converts mechanical energy…
Q: 400 V 50 Hz, Y-connected, 6-pole synchronous generator per phase synchronous reactance 1.0 Ω at back…
A:
Q: A 480-V, 60-Hz, Y-Connected synchronous generator, having the synchronous reactance of 1.04 ohm and…
A: Generator is a device to convert a mechanical energy to electrical energy. It is work on the…
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 50 Hz, 4-pole, Y-connected synchronous generator is supplying a load with Vt = 220-V /phase at…
A:
Q: (2)A 20 MVA, 3-phase, star-connected, 50HZ, salient pole synchronous generator with X =1 pu, X =…
A:
Q: A 100KVA, 6.6 kV 3 PHASE star connected cylindrical pole synchronous generator has 20-ohm as…
A: Given: A 100KVA,6.6kV 3 PHASE star connected cylindrical pole synchronous generator has 20-ohm as…
Q: Q1. A three-phase, 200MVA, 10kV cylindrical rotor generator having a synchronous reactance of 1.2 pu…
A:
Q: Q4. The open-circuit and short-circuit test readings for a three-phase, Y-connected, 1 MVA, 2 kV,…
A: Given data, Voltage V=2000Volts
Q: A three-phase, 60-Hz, 500-MVA, 11.8-kV, 4-pole steam turbine-generating unit has an H constant of 6…
A:
Q: A short-shunt compound generator has armature, shunt field and series field resistances of 0.5 2,…
A: Load current =power delivered to load/terminal voltage. Voltage across field winding =terminal…
Q: 1. A 20-kVA, 220 V, wye-connected, 3-phase, salient-pole synchronous generator supplies rated load…
A: Note: We are authorized to answer three subparts at a time, since you have not mentioned which part…
Q: A 400KW 600 volts long shunt dc compound generator has a shunt field resistance, armature resistance…
A: Introduction There are two sets of the field winding on each pole in a compound wound generator.…
Q: A 3-phase, Y connected, round rotor synchronous generator rated at 8KVA, 220V has a Synchronous…
A:
Q: 11 What is the dq component - Park transform The effective stator field current is I, = and the…
A: The direction of the direct-axis current is along the direction of the rotor magnetic field and the…
Q: A 287 -MVA, 115 -kV, 0.9-PF-lagging, 50-Hz, two-pole, del-connected synchronous generator has a per…
A:
Q: A 480-V, 50HZ, Y-connected, 6-pole synchronous generator has a per-phase synchronous reactance of…
A:
Q: Q6/ When a 50-k VA, 3-phase, 440-V, 60-Hz synchronous generator is driven at its rated speed, it is…
A: The solution is given below
Q: Problem 6 a. What conditions must be satisfied before a generator can be operated in parallel with…
A:
Q: Determine the equivalent circuit of synchronous machines. Then, Determine the phasor diagram for…
A:
Q: Q-1. A 3 phase, 0.8 MVA, 3.3 kV, star - connected synchronous generator has 5 N/phase synchronous…
A:
Q: A 7.5kW, 415V, 50HZ, 4 pole, star connected induction machine is connected to a 3 phase inverter…
A: Given data: 4 pole, 50 Hz machine Rotor speed = 555 rpm Rotor current = 4 A Rotor inductance = 4.51…
Q: A 480V, 50HZ, star-connected 6 poles synchronous generator has a per phase synchronous reactance of…
A:
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…
Q: A long-shunt compound generator supplies a terminal voltage of 220 V when delivers 110 A. Determine:…
A: In the question, Find the total inducse emf. Total power generator. P= EIa Power P= I2 R…
Q: A 4-pole, 250V, 120kW, DC short shunt compound generator has the following parameters: Ra=0.015 Ω,…
A: Generator Rated output current =10000220=45.45 ampsIa=II+Ifwhere Ia is armature current,Il is output…
Q: A 3-phase, Y connected, round rotor synchronous generator rated at 12KVA, 230V has a Synchronous…
A: i have explained in detail
Q: Find the load angle and the components of armature current Id and Iq
A:
electric machines2
Step by step
Solved in 3 steps with 3 images
- A synchronous generator is rated 645 MVA, 24 kV, 0.9 pf lagging. It has a synchronous reactance 1.2 . The generator is feeding full load at 0.9 pf lagging at rated voltage. Calculate: (a) Excitation emf (E,) and power angle & (b) Reictive power drawn by the load Carry out calculations in pu form and convert the result to actual values.A 50-MVA, 30-kV, three-phase synchronous generator has a synchronous reactance of 8 Ohms/phase and negligible armature resistance. The generator is delivering 50 MVA at 0.8 pf leading to an infinite bus at the rated voltage. Determine the excitation per phase E and the power angle &. Select one: O a. E = 22.78 KV and 8= 15.67 deg. O b. E = 14.115 KV and 8= 25.85 deg. O c. None of these O d. E = 13.96KV and 8= 29.74 deg. O e. E = 27.47KV and 8= 22.84 deg. Impedances are marked in perunit on a 100MVA, 100 KV base. The load at bus 2 is S2= 16MW - 132 MVAR, and the load at EN ? 1:4 4/1- TOSHIBAWhich of the following is true in the phasor diagrams drawn according to the ohmic, inductive and capacitive operating states of the round pole synchronous generator a) Due to the voltage Efd, the excitation current is large in capacitive operation and small in ohmic operation b) Due to the voltage Efd, the excitation current is large in ohmic operation and small in inductive operation c) Due to the voltage Efd, the excitation current is small in capacitive operation and large in inductive operation. d) Due to the voltage Efd, the excitation current is large in capacitive operation and small in inductive operation.
- 2.2 A three-phase synchronous generator has a reactance of 1.5 p.. and negligible resistance. It supplies a rated current of 1.0 p.. at 1.0 p.u. terminal voltage to a lagging load of 0.9 power factor. Determine the rated excitation voltage in p.u. and the internal load angle. Construct the performance chart of the generator in 2.1 (above) assuming its rating is 450 MVA.The theoretical maximum real power generation of a synchronous generator is achieved by: Select one: a. Making the phase shift between the current and voltage equal to zero. Ob. All of these answers are correct. c. Making the terminal voltage V equal to the excitation voltage E. d. Making the power angle equal to 90 degrees. Oe. None of these answers is correct. geA 1500 kVA, star-connected, 2300 V, 3-phase, salient-pole synchronous generator has reactance Xd= 1.95 ohm and Xq= 1.40 ohm per phase. All losses may be neglected. Find the excitation voltage for operation at rated kVA and power factor of 0.85 lagging.
- two synchronous generators are connected in parallel, feeding a load together. the frequency of the first generator in the no-load State is 52 Hz and the slope of the characteristic is 1 MW/Hz. the total power of the load fed by these two generators is 2.5 MW and the power coefficient is 0.6 inductive. by drawing the characteristic curve of the system;a) what is the frequency of the system when the load in question is fed, and how do the two generators share the load between themselvesb) if a load of 0.5 MW is added to the system, find the operating frequency of the new system and the powers given by each generatorc) if a second load of 0.5 MW is connected to the system, the idle operating frequency of the second generator is increased by 0.5 Hz, what happens to the operating frequency of the system and the power values given by the generatorsA 1500 kVA, star-connected, 2300 V, 3-phase, salient-pole syn- chronous generator has reactances X4= 1.95 Q and X, = 1.40 2 per phase. All losses may be neglected. Find the excitation voltage for operation at rated kVA and power factor of 0.85 lagging.The power factor of a 3-phase, star-connected, salient-pole synchronous generator is ignored by the armature winding resistance;a) 0.8 inductiveb) 0.8 capacitivec) 1 ohmicDraw the phasor diagrams for the values.
- Problem-7 (e)- A 4 pole, 50 Hz synchronous generator has 48 slots in which a double layer winding is housed. Each coil has 10 turns and is short pitched by an angle to 36° electrical. The fundamental flux per pole is 0.025 Wb. Find the line-to-line in induced emf (in volts), for a three wire connection.(use 2-decimal digits for solutions) A synchronous generator runs at 250 rpm and generates at 50-Hz. There are 216slots, each containing 5 conductors arranged in a full-pitched winding for 3-phasestar connection. All the conductors of each phase are in series and the flux perpole at no-load sinusoidally distributed over the pole pitch is 30 mWb. Find the emfinduced in each phase winding and the terminal voltage.A 60 MVA, 69.3 KV, three-phase synchronous generator has a synchronous reactance Xs = 15 ohm/phase. The generator is supplying its rated power (i.e. 60 MVA) to an infinite bus at 0.8 power factor lagging. Determine: a) The armature current Ia. b) The generator emf per phase (E). c) The power angle. d) The maximum power (P) that the generator can supply. Xs = j 150 la Vline = 69.3 KV