a) Two thermal generator units have the following incremental cost curves then determine the ECONOMIC LOAD SCHEDULING between the generators for total load(PD) of 50 MW,65 MW,85 MW,110 MW and 150 MW. When load is zero, the cost of production of the generators are 100 and 180 respectively. Assume both generators are operating at all times and power loss is neglected. Also, Calculate Cost of production in each case. F1= 0.22 + 0.16 P1 Unit 1: Min 25 MW, Max 90 MW: F2= 0.48 + 0.41 P2 Unit 2: Min 15 MW; Max 75 MW
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: Q5. Explain the difference for the following paragraphs, answer five only A. Auto transformers and…
A: Convention transformer: This transformer is basically a two winding transformer or we can say that…
Q: A power generating plant consists of two multiple-valve generating units whose fuel cost functions…
A: This question belongs to power system . It is based on the concept of economic load scheduling .…
Q: The voltage regulation of synchronous generator is defined as the rise in voltage when the load is…
A: Voltage regulation:- it is defined as the measure of change in the voltage magnitude between the…
Q: An 8-pole lap-connected d.c. shunt generator delivers an output of 240A at 500V. The armature has…
A: No. of poles (P) = 8 Armature current (Ia) = 240 A No. of armature conductors (Z) = 1408 No. of…
Q: For the closed-loop control system described by the block diagram shown in figure below. determine…
A: In this question we will find range of k for steady state error to be zero...
Q: (a) List the advantages of a DC system operated at railway electrification system. (b) A passenger…
A:
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 "round rotor 3-phase star connected alternator", some parameters of which are given below,…
A:
Q: Modern locomotives are powered by DC motors Those are, in turn, driven by diesel engines. Which of…
A: To answer this question, we will refer the concept of DC system regarding locomotive and then will…
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: 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: PA FAB DA = 2000 MW DB = 1000 MW Figure P6.2 Two-bus power system for Problems 6.2, 6.3, 6.4, 6.10…
A: According to guidelines we need to solve only first three subparts. According to the question,…
Q: A 250 MW, 50 Hz power system has a speed regulation of 5% based on its own rating. Due to a sudden…
A:
Q: 5. Circuits need only small step-up/down ratios employ: (a) Inverters (b) Transformer rectifier…
A: (5) The inverters are used to covert the sinusoidal power input to direct power output. 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. (a) A power generating plant consists of two multiple-valve generating units whose fuel cost…
A: Note: We are authorized to answer one question at a time, since you have not mentioned which…
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: Athree-phase, 60-Hz, 500-MVA, 11.8-kV, 4-pole steam turbine-generating unit has an H constant of 6…
A: The given data are:
Q: A 2-pole, 50 Hz, 11 kV synchronous generator with a rating of 120 MW and 0.87 lagging power factor…
A: Question: A 2-pole, 50 Hz, 11 kV synchronous generator with a rating of 120 MW and 0.87 lagging…
Q: A 500-kW, 60-Hz, 2300-V, six-pole alternator A is paralleled with a 300-kW, 60-Hz, 2300-V, four-pole…
A:
Q: Q.3: Two separately excited DC generators are connected in parallel to supply a total load current…
A: Given For Generator G1 Ra1 =0.2 ohm Induced emf E1 =400 V Constant loss = 5 KW For Generator G2…
Q: Discuss in detail about the steady state performance synchronous machine operation, when connected…
A: The steady-state characteristics of a synchronous motor : It can be represented by phasor diagrams…
Q: A 3 phase, 415V, 50HZ, Delta connected synchronous machine, is operating as a synchronous capacitor…
A: Given data about induction motor: VL=415V f=50Hzcosϕm=0.48 Obtain the power factor…
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: 5 10 15 20 25 30 Wind speed From the power curve above, estimate the value of the following: t-in…
A: Since you have asked multiple questions in a single request, we will be answering only the first…
Q: b) indicate with a cross where the power limit and the MVA limit coincide; then by construction…
A: Solution- From the given graph,tan θ=0.720.7θ=tan-11.028θ=45.81°
Q: A 16-cylinder, 39.37cm x 55.88cm x 327-rpm, 4-cycle stationary, diesel engine is connected to a…
A: According to the question we have to find the value of BMEP.
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: Air flowing at 604000 kilograms per second at a speed of 57 kilometres per hour. Assume the power…
A: The rate of the air flow is 604000 kilograms per second. The velocity of air is 57km/hr.
Q: Two separately excited DC generators are connected in parallel to supply a total load of 300 A. The…
A: Current shared by generator is such that terminal voltage is same for both generators. power output…
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: 4-A long shunt compound DC generator delivers a load current of 150A at 230V and has armature,…
A:
Q: Two separately excited DC generators have the following parameters: (G1: Ra= 0.2 Q and induced…
A: Circuit diagram will be like:
Q: (a) A power generating plant consists of two multiple-valve generating units whose fuel cost…
A: Given Power generating plant consists of fuel cost function…
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: 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: (a) A power generating plant consists of two multiple-valve generating units who fuel cost functions…
A:
Q: Given two thermal generating units. For an accuracy of 1.8 MW, and two iterations were performed…
A: First iteration results P1k =180.5 MW P2k =160.5 MW second iteration results P2k+1 =162.8 MW P1k+1…
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: Show that an alternator running in parallel on constant-voltage and frequency bus-bars has a natural…
A:
Q: Which among the following is the major portion of the operating cost which can be controlled in a…
A: The power plants are used to generate electricity. This generation of electricity involves many…
Q: A 3 phase, star-connected, cylindrical rotor, 10 MVA, 11kV synchronous generator is supplying rated…
A: Given a synchronous generator with 10 MVA ,11 KV The terminal voltage and real power is constant…
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...
Step by step
Solved in 2 steps with 4 images
- The fuel-cost curves for two generators are given as follows: C1(P1)=600+18P1+0.04(P1)2C2(P2)=700+20P2+0.03(P2)2 Assuming the system is lossless, calculate the optimal dispatch values of P1 and P2 for a total load of 1000 MW, the incremental operating cost, and the total operating cost.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 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.
- 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 synchronous generator is connected to an infinite bus by a transmission line as shown in the figure. The field current IF = 900A when the unloaded generator is synchronized to the infinite bus. a.) P_M is increased to 0.5pu while I_F is held constant at 900A. Find the complex power S_Inf supplied to the infinite bus in per unit. b.) Determine S_Inf in per unit if IF increases to 1600A and PM is held fixed at 0.5pu.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…
- The yearly duration curve of a certain plant may be considered as a straight line from 100 MW to 40 MW. To meet this load, three turbo-generators, two rated at 40 MW each and one at 30 MW are installed. Determine: (a) units generated per annum, (b) plant capacity factor, (c) load factor, (d) plant reserve factor and (e) utilization factor.a) With the aid of a diagram and phasor diagram, explain the double-reactance concept for salient-pole alternators. b) 3-phase star-connected synchronous generator supplies a current of 10A having phase angle of 20° lagging 400V (phase voltage). Given the direct and quadrature axis reactances as 10ohms and 6.5ohms respectively and neglecting armature resistance, Find: 1. The load angle 2 The direct and quadrature components of armature currents 3. Voltage regulationA 1000KVA, 6.6 kV 3 PHASE star connected cylindrical pole synchronous generator has 20-ohm as synchronous reactance and the armature resistance is negligible and the generator is working at the full load and unity power factor then find the value of the induced emf voltage(line to line).
- An area of an interconnected power system has two fossil-fuel operating on economic dispatch. The variable operating costs of these units are given by in image Determine the power output of each units, the incremental operating cost, and the total operating cost that minimizes when total load demand is 250, 500, 750, 1000 and 1250 MW, transmission losses is neglecting?A three-phase synchronous generator is rated 60 MVA, 11 kV. It has an armature resistance ra = 0.1 pu and synchronous reactance xS = 1.65 pu. It is feeding into an infinite bus at 11 kV delivering a current 15 kA at 0.9 power factor lagging. (a) Determine internal voltage (E) and power angle (δ). (b)Draw a vector diagram for this operation and state operating mode of the generator.(c) Infinite bus voltage falls to 10 kV while the mechanical power input to generator and itsexcitation remains unchanged. What is the value of the current, power factor and reactivepower delivered to the infinite bus.Per-unit values are given on machine rating as the base.Two star-connected, cylindrical rotor synchronous generators of identical rating operate in parallel to supply a load of 50 MW at 11∠0° ??V with 0.8 power-factor lagging. The internal e.m.f (line-to-line) of generator A is 15∠??A kV and the machine delivers 30 MW, the remaining power being supplied by generator B. The synchronous reactance for each machine is 1.92 Ω. Neglecting all losses, determine the internal line voltage of generator B plus its load angle.