A 16-cylinder, 39.37cm x 55.88cm x 327-rpm, 4-cycle stationary, diesel engine is connected to a 3,125 KVA (80% Power Factor) generator. It also drives a 30-kW exciter. Assume a generator efficiency of 92% and determine the Break-Mean-Effective-Pressure (BMEP), in kg/cm2, at rated load.
Q: Q1:A: The following data apply to a 100-kW 250-V six-pole, 900-rpm compound generator (long-shunt…
A: Output is 100kWatt and 250 watt. So output current is 100 kW250=400 A It is a long shunt…
Q: A 3 phase 4MVA, 12 kV star connected synchronous generator has Zs= 0.8+J30 ohm. Using circle diagram…
A: 3φ synchronous generator,4MVA,12kVZs=0.8+j30 ΩZs=R+jX ΩR=0.8Ω
Q: LA 25 KW, 250V, dc shunt generator has armature and field resistance of 0.060 and 100 Q…
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: A cylindrical rotor synchronous generator with constant real power output and constant terminal…
A:
Q: (2)A 20 MVA, 3-phase, star-connected, 50HZ, salient pole synchronous generator with X; =1 pu, X =…
A:
Q: A. A 20KW, 440V, SHORT SHUNT COMPOUND DC GENERATOR HAS FULL LOAD EFFICIENCY OF 87%. IF THE…
A: NOTE: We’ll answer the first question since the exact one wasn’t specified. Please submit a new…
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: Q: In a long-shunt compound generator, the terminal voltage is 220 V when generator delivers 500 A.…
A: Given Data: Vt = 220 V IL = 500 A Rsh = 110 ohm Rse = 0.002 ohm Ra = 0.01 ohm
Q: Two separately excited DC generators are connected in parallel to supply a total load current of 100…
A:
Q: A 3 phase 1.2 MVA, 10 kV star connected synchronous generator has Zs= 0.2+J10 ohm. Using circle…
A: Synchronous Generators, often known as alternators, are the most commonly used generators for…
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) Two thermal generator units have the following incremental cost curves then determine the…
A: The incremental cost functions are given as On solving equations (1) and (2)
Q: EMachines A 100 MVA, 11.5 kV 0.8 pf lagging 50-Hz two pole Y-connected synchronous generator has a…
A:
Q: armature series field and shunt field resistance of a 125 kw, 250V long shunt cumulative compound DC…
A: In this question we will find power in shunt field of long shunt compound generator...
Q: A 240-V, short-shunt, cumulative compound generator is rated at 100 A The shunt field current is 3…
A: Efficiency: It tells that how much input power in applied to the machine and how much power is…
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: 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 3 phase 1.2 MVA, 10 kV star connected synchronous generator has Zs= 0.2+J10 ohm. Using circle…
A: A Synchronous Generator is also known as the alternator, the most widely used generator for power…
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: Q3 Show that, if the stator resistance of a three-phase induction motor is negligible, the ratio of…
A: Three-phase induction motor. This is an electromechanical motor and works on the induction…
Q: (2)A 20 MVA, 3-phase, star-connected, 50HZ, salient pole synchronous generator with X =1 pu, X =…
A:
Q: short-shunt compound generator has armature, shunt field and series field resistances of 0.5 Ω, 156…
A: In this question we will find generated emf of short shunt compound generator...
Q: Q1. A three-phase, 200MVA, 10kV cylindrical rotor generator having a synchronous reactance of 1.2 pu…
A:
Q: The following information is given for a 320KW 600V long shunt flat compound generator, when the…
A: In the question, Dc long shunt compound Generator have all parameters. Find the induced voltage…
Q: Q4 )) A 10-MVA three-phase, Y-connected 13800V two-poles, 60 Hz turbogenerator has an armature…
A:
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: Q1) A chopper-controlled dc motor has the following parameters: 6.3 A, 200 V, 1000 rpm, Ra = 4 ohm,…
A: consider the given question; A chopper-controlled dc motor has the following parameters:6.3 A, 200…
Q: (5) Calculate the speed regulation if nFL İ 1763 rpm and nNL İ 1999 rpm. Answer as percentage to one…
A: Given Full Load Speed nFL=1763 rpm and no load speed is nNL=1999 rpm Speed Regulation =nNL-nFLnFL×…
Q: 4. (c) A 3-phase Y-connected synchronous generator supplies current of 15 A having phase angle Of…
A: A synchronous generator is a device that uses electromagnetic induction to transform mechanical…
Q: Example 5: A short-shunt compound generator delivers a load current of 30 A at 220 V, and has…
A: The solution can be achieved as follows.
Q: A 13. 50-MVA, 0.9-power-factor-lagging. 60-Hz, four-pole Y-connected synchronous generator a…
A: "Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: A 3-phase, Y connected, round rotor synchronous generator rated at 8KVA, 220V has a Synchronous…
A:
Q: Q1. shunt generator delivers a full-Hoad outpu power of 8 Kw at 200 V. It has an armature and shunt…
A: According to our policy , we will answer only the first part of the question . If you want solution…
Q: Q1. shunt generator delivers a full-Hoad outpu power of 8 Kw at 200 v. It has an armature and shunt…
A: We are authorized to answer one question at a time, since you have not mentioned which question you…
Q: A four-pole, 600-V synchronous generator is connected to an infinite bus that supplies a 60-Hz,…
A: Referring to the question, the information are provided as:
Q: A 4 pole lap wound shunt generator delivers 200A at a terminal voltage of 220V. Ra and Rsh are 0.02Ω…
A: For this problem, given terminal voltage is 220V, armature resistance 0.02ohms.
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: 7) For a three phase, 4-Pole, synchronous machine having 48 stator slots, Find out the width factor…
A: Give Plols (P)=4Slots (s)=48phase (m)=3
Q: Question 1 A 10 MVA, 3-phase , Y-connected, two pole,60 Hz, 13.8Kv, line to line turbogenerator has…
A: Calculating current, Calculating phase voltage, Calculating power factor,
Q: 13. A synchronous machine is run as an unloaded motor. If a low voltage is supplied at the rated…
A: Under no load condition, synchronous machine will only draw a small current to mainly compensate…
Q: A 25 kW Shunt Generator generates terminal voltage 400V at full load and has resistances of field…
A: Given a shunt generator having, Po/p=25kWVT=400VRsh=200ΩRa=1.75ΩFriction & windage loss=600W
Q: Q22. Class A chopper is supplying a DC motor with FWD, motor inductance- 6 H & resistance= 12 2,…
A: Given: L=6 H R=12 ohm F=1 Khz ton=0.5 ms Vs=220 V
Q: A 25 MVA, 24.25 kV, 50 Hz, 4 poles, Y- connected synchronous generator has a synchronous reactance…
A: For a Y- connected synchronous generator, given that: Apparent load (SL) = 25 MVA; Terminal voltage…
Q: A power station comprises two synchronous generators with 200 MW and 400 MW putput power capacity.…
A: Given thatPArated=200MWPBrated=400MWfffull=1.005pudroop=3%
Q: Q: Find the value of the starting capacitance for a 250 W, 120V, 60 Hz motor that is necessary to…
A: A motor which uses a capacitor to starting operation is mostly cage motor. The auxiliary and main…
Q: Q/ dc shunt generator 4 pole with 500 condcutor , wave running at speed 1000 r.p.m the resistance of…
A:
Q: A 220V long shunt generator has armature, shunt field, and series field resistances of 20, 5502, and…
A: In this question we will find armature current...
A 16-cylinder, 39.37cm x 55.88cm x 327-rpm, 4-cycle stationary, diesel engine is connected to a 3,125 KVA (80% Power Factor) generator. It also drives a 30-kW exciter. Assume a generator efficiency of 92% and determine the Break-Mean-Effective-Pressure (BMEP), in kg/cm2, at rated load.
Step by step
Solved in 3 steps with 2 images
- A 45-MVA, 41.57-kV, three-phase round-rotor synchronous generator has a synchronous reactance of 9 ohm per phase and negligible armature resistance. It supplies a load which is connected to an infinite bus as shown in Fig. 1. 1) Determine the magnitude of the generated emf per phase and the power angle δ when the generator is supplying a 28-MW load at 0.76 power factor lagging at 95% of the rated terminal voltage. 2) Draw a phasor diagram showing the magnitude and relationship between the generated emf, the generator terminal voltage and the armature current for the operating condition in Part 1. 3) The generator is delivering 22 MW to the bus bar at 95% of the rated voltage with its field current adjusted for a generated emf of 25 kV per phase. Find the voltage regulation, the armature current, and the power factor for this operating condition.QUESTION 1:- (a) A 4-pole, 3-phase, star-connected, 50 Hz synchronous generator, with a synchronous impedance of j24.5 Ω/phase and negligible resistance, delivers 5 MW of power to a 13.8 kV busbar. At this operating point, the excitation is equal to 1.8 p.u. Calculate the phase value of the generated emf (E) and hence calculate the electrical load angle, δ, at which the machine is operating. (b) Sketch a typical operating chart for a salient pole synchronous generator and on the chart identify the following; The Apparent Power limit, The field (excitation) limit, The Real Power limit, A line which represents a constant lagging power factor, The rotor angle for operation at any given point of operation, e.g. rated power and 0.9 power factor lag. (c) A Stamford HCI534F framesize generator has been selected for a stand-alone diesel-generation application. The generator is to operate at 400 V, 50 Hz, with the self-excited (SX) excitation scheme. Datasheet information can be…A gas turbine, 2-pole, 3? synchronous generator rated at 200 MW is connected to the grid (presumed to be an infinite bus). The electrical operating frequency of the grid is 60 Hz, and the slope of the frequency-power curve for the generator is 15 MW/Hz. a. If the no-load setpoint for the generator is set to 63.5 Hz, how much active power will the generator provide to the grid? b. Neglecting system losses, what is the torque provided by the gas turbine? c. What would happen if the no-load setpoint for the generator is set to 59 Hz?
- A power plant comprises three turbine-generators rated 1000 MW, 800 MW and 600 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 250 MW. Calculate the following:a) Per-unit area frequency response characteristic on a 1000 MW system base [CR9]b) Steady-state drop in area frequency [CR4]c) The share of the load increase on each generator [CR9]d) Total load on each generator after the increase in system load [CR3]Assume the reference power setting of each turbine is unchanged.the armature series field and shunt field resistance of a 125 kw, 250V long shunt cumulative compound DC generator are 0.025ohms, 0.01ohms and 30 ohms, respectively. If the stray power stray loss at rated load is 25 kW, determine the power in the shunt field. Assume a astray load loss of 1% of the load power output (note: Input power generator is equal to the motor brake horsepower, Pin=Pl+Plosses) Choices A. 2034.5 W B.2082.5 W C. 2065.5 W D. 2053.5 WA 3 phase, star connected synchronous generator supplies current of 10A having phase angle of 20º lagging at 400V. Find the load angle and the components of armature current Id and Iq if Xd = 10 ohm and Xq = 6.5 ohm Assume armature resistances to be negligible
- A short shunt compound generator supplies a load of 10 kW at 200 V through a pair of feeder and series field resistance 0.10 ohm. Armature resistance, shunt field resistance and series field resistance are 0.01 ohm, 52.2 ohms and 0.10 ohm, respectively. If the core friction and windage losses amount to 631 watts, the BHP of the driving engine is nearest toA 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.Calculate for full-load and unity p.f., the natural period of oscillation of a 50-Hz, 10,000-kVA, 11-kV alternator driven at 1500 r.p.m. and connected to an infinite bus-bar. The steady short-circuit current is four times the full-load current and the moment of inertia of the rotating mass is 17,000 kg-m2. ANSWER IS [1.148 second]
- A 70-MVA, 69.3-kV, three-phase round-rotor synchronous generator has a synchronous reactance of 14 ohm per phase and negligible armature resistance. 1) The generator is delivering rated power at 0.87 power factor lagging at the rated terminal voltage to an infinite bus bar (Fig. 1). Determine the magnitude of the generated emf per phase and the power angle δ. 2) The generator is delivering 53.5 MW to the bus bar at the rated voltage with its field current adjusted for a generated emf of 46 kV per phase. Determine the armature current and the power factor. Is the power factor is lagging or leading? 3) Given that the generator is operating at the excitation voltage of Part (1), determine the maximum steady-state power which the machine can deliver without losing synchronism. Find the armature current corresponding to this maximum power.A 20KW, 440V, short shunt compound dc generator has full load efficiency of 87%. If the resistance of the armature and interpoles is 0.4ohm and that of the series and shunt fields 0.25ohm and 240ohms respectively, calculate the combined bearing friction, windage and core loss of the machine A 10 kW 250 volts self-excited generator, when delivering rated load, has an armature-circuit voltage drop of 5% of the terminal voltage and a shunt field current equal to 5% of the rated load current. The resistance of the armature is 0.02 ohm. Calculate the voltage generated and power output.An AC Asynchronous motor has the following parameters; Connected voltage,UN=400V Frequency,f=50hZ Nominal PowerPN=1kW, Breakdown Slip,SBD=0.289 Rotational speed (at nominal),nN=1410min-1 Number of poles=2 Nominal Efficiency ,դ=0.84 Calculate I)Calculate the Apparent Power of Nominal Operation,SL1,N1 II)Calculate the Reactive Power of Nominal Operation per single phase,QL1,N1 III)Calculate the Capacitance of CN1 which has to be connected parallel to the single Phase full power factor at nominal operation