Q1. The yearly load duration curve of a certain power station can be approximated as a straight line; the maximum and minimum loads being 80 MW and 40 MW respectively. To meet this load, three urbine generator units, two rated at 20 MW each and one at 10 MW are installed. Determine (i) installed capacity (ii) plant factor (iii) kWh output per year (iv) load factor
Q: A three-phase, wye-connected, 7 kVA, 230 V synchronous generator has a reactance of 7 ohms per…
A:
Q: The yearly duration curve of a certain plant may be considered as a straight line from 100 MW to 40…
A: Maximum demand = 100 x 103kwMinimum demand = 40 x 103 kwInstalled capacity = 40 x 103 kw of 2 No⇒30…
Q: 1.Thyristor-Switched Series Reactor (TSSR) for power factor improvement
A: NOTE: As per the policy, I can only answer one question at a time. Please ask the second question…
Q: For an infinite bus the power factor of an alternator is determined by which parameters? Option 1:…
A: For infinite bus pf of alternator is defined by_____
Q: 431 It is recommended to use a software program to solve the nonlinear equation in Q2 (b). Question…
A: The answer as given below
Q: The yearly load duration curve of a certain power station can be approximated as a straight line;…
A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: A 60-Hz synchronous generator having inertia constant H9.94 MJMVA and a transient reactance X0.3 per…
A:
Q: A simple power system is shown in this Fig. The generator (480 V, 10 kVA) is connected to an ideal…
A: NONE of the given OPTIONS is correct
Q: Example 3 The annual load duration curve of a certain power station can be considered as a straight…
A: Plant factor =Average demand plant capacity Load factor=Average load Maximum load on demand…
Q: A 6 kV , 1000 kVA , 3-ph alternator is delivering full-load at 0.8 lagging. Its reactance is 20% and…
A: Given values are - Value of reactance in ohms is -
Q: 1. Write down a formula for the three-phase active power, assuming perfectly sinusoidal and…
A: The power system has to transmit power from the generation side to the load side. For this purpose,…
Q: Q1// a three-phase, 60Hz, 500 MWVA, 15kV, 32 pole hydroelectric generating unit has an H constant of…
A: (a) ωs=2πf Plugging the known values, f=60 Hzωs=2πfωs=2π×60 radsωs=377 rads ωsm=2Pωs Plugging the…
Q: A simple power system is shown in this Fig. The generator (480 V, 10 kVA) is connected to an ideal…
A: For this power system ,we choose the base value quantities same as rating of transformer. Base…
Q: Q6: A five-bus network has generators at buses 1 and 3 rated 270 and 225 MVA, respectively. The…
A:
Q: First Quiz A generating station has a maximum demand of 10 MW. Calculate the cost per unit generated…
A: The solution for the given plant's cost per unit can be achieved as follows.
Q: Problem2 A generator having H = 6.0 MJ /MVA is delivering power of 1 per unit to an infinite bus…
A:
Q: The Hellmann formula describes? (a) solar irradiance depending on the thickness of the cloud cover.…
A: The velocity of wind varies with the height above the ground.
Q: A generating plant containing three identical 40 MW generating units is connected to a constant 82…
A: SI No Unit Failure rate Repair time Frequency Duration Failure probability 1 40 MW 3…
Q: Provide concise answers for the following questions a. Why is it preferred to use the pu system in…
A: derivation for Per unit impedance, if a change of base occurs is derived as shown below.
Q: In power system scenario of Sultanate of Oman, the present installed capacity in year 2021 is…
A: This question is from the Generation unit of "Power System". Under which we are going to study about…
Q: L-type equivalent circuit and parameters for a continuous sinusoidal phase of a 5.5 kW, 1450 rpm,…
A: According to the context of the given question, it is required to determine the number of times…
Q: The one-line diagram of a simple power system is shown in Figure below. The neutral of each…
A: In this question we need to find a 3 phase fault at bus 3 .
Q: Q1. The yearly load duration curve of a certain power station can be approximated as a straight line…
A: As per Bartleby guidelines we are allowed to solve only one question,please ask the rest again. The…
Q: A generating station supplied the following loads: 150 MW, 120 MW, 85 MW, 60 MW, and 5 MW. The…
A:
Q: 10.1 Suppose that you are given a single area with three generating units as shown in Figure 10.26.…
A:
Q: In the system shown below, the generator is ideal (Xs = 0) and the magnitude of the load bus…
A:
Q: A system contains three non-identical 30 MW generating units each with a 5% FOR and one 50 MW unit…
A:
Q: Question 1 In the system shown below, the generator is ideal (Xg = 0) and the magnitude of the load…
A:
Q: In a long term adequacy based reliability Evaluation for a generation system, if reliability index…
A: This question is from "POWER SYSTEM(GENERATION)".Under which we are going to study how to improve…
Q: (a) Give the condition for the loss of load in a power generation system in terms of outages in…
A: We will discuss the condition of loss of load in terms of outages of generation units and also…
Q: 8. Calculate the continuous power that will be available from hydroelectric plant having an…
A:
Q: Q1. A// Choose the correct answer: 1. One of the advantage of using a per unit system in power…
A: According to guidelines we are allowed to do only first 3 questions , please post again for…
Q: The Nominal System Voltage is stepped-up at the Generating Station in preparation for the Power to…
A: In this answer let us try to understand whether the given statement is true or false.
Q: Florida Electrical Transmission Company has to supply the demand of four companies in different…
A: The solution can be achieved as follows.
Q: The yearly load duration curve of a certain power station can be approximated as straight line; the…
A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: Example 3 The annual load duration curve of a certain power station can be considered as a straight…
A:
Q: Q3) Two power stations A and B operate in parallel. They are interconnected by a short transmission…
A: To meet the system stability and required power, generators are connected in parallel. Different…
Q: Which of the following statements about next-generation wind energy is correct? a. They will have a…
A:
Q: B) Four regions of peak loads 5 MW, 7 MW, 8 MW and 10 MW are supplied by a generating station. The…
A: Peak loads are given, 5 MW, 7 MW, 8 MW, 10 MW. Average load factor LF = 0.6 Diversity factor DF =…
Q: All Choose the correct answer: 1. One of the advantage of using a per unit system in power system…
A: Per unit quantity is equal to the division of actual quantity and base quantity. There are two types…
Q: Q1. All Choose the correct answer: 1. One of the advantage of using a per unit system in power…
A: As per the guidelines of Bartley we supposed to answer first three subpart only.
Q: A generating system contains three 20 MW generating units each with a 3% FOR and one 45 MW unit with…
A: A table for unit system capacity outage is shown below:
Q: Description In the particular case of figure below derive both the critical clearing angle and the…
A: Critical clearing angle (δcr) Critical clearing angle is a maximum limit of angle seen by the…
Q: The yearly load duration curve of a certain power station can be approximated as a straight line ;…
A:
Q: Q2/ The following demands in a power plant as: Group 1: 300 kW between 7 A.M. and 8 P.M Group 2: 150…
A:
Q: 2.41 A three-phase 25-kVA, 480-V, 60-Hz alternator, operating under bal- anced steady-state…
A: In this question we need to determine a power triangle for the given operating conditions of…
Q: B) A generating station supplied the following loads: 150 MW, 120 MW, 85 MW, 60 MW, and 5 MW. The…
A:
Q: (1) In terms of load assessment, define the following: Demand Factor Load Factor Diversity
A: As per the guidelines of Bartley we supposed to answer first question only since both question are…
Q: A generating station has a maximum demand of 30MW, a load factor of 65%, a plant capacity factor of…
A: Solution for all parts is done below and attached, kindly check out.
Step by step
Solved in 3 steps
- Three single-phase, two-winding transformers, each rated 450MVA,20kV/288.7kV, with leakage reactance Xeq=0.10perunit, are connected to form a three-phase bank. The high-voltage windings are connected in Y with a solidly grounded neutral. Draw the per-unit equivalent circuit if the low-voltage windings are connected (a) in with American standard phase shift or (b) in Y with an open neutral. Use the transformer ratings as base quantities. Winding resistances and exciting current are neglected.Consider two interconnected voltage sources connected by a line of impedance Z=jX, as shown in Figure 2.27. (a) Obtain expressions for P12 and Q12. (b) Determine the maximum power transfer and the condition for it toIn developing per-unit equivalent circuits for three-phase transformers. under balanced three-phase operation. (i) A common Sbase is selected for both the H and X terminals. (ii) The ratio of the voltage bases Vbase/VbaseX is selected to be equal to the ratio of the rated line-to-line voltages VratedHLL/VratedXLL. (a) Only one of the above is true. (b) Neither is true. (C) Both statements are true.
- While the instantaneous electric power delivered by a single-phase generator under balanced steady-state conditions is a function of time havi ng two components of a constant and a double-frequency sinusoid, the total instantaneous electric power delivered by a three-phase generator under balanced steady-state conditions is a constant. (a) True (b) FalseConsider 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.2. a) Explain the terms load factor and diversity factor. b) Discuss the advantages of interconnected grid system. c) A generating station is to supply four regions of load whose peak loads are 10 MW, 5 MW, 8 MW and 7 MW. The diversity factor at the station is 1-5 and the average annual load factor is 60%. Calculate: (i) the maximum demand on the station, (ii) annual energy supplied by the station and (iii) suggest the installed capacity and the number of units.
- The yearly load duration curve of a certain power station can be approximated as a straight line; the maximum and minimum loads being 40 MW and 10 MW respectively. To meet this load, three turbine generator units, two rated at 20 MW each and one at 10 MW are installed. Draw the load duration curve and determine: (i) Installed capacity (ii) Plant capacity factor (iii) kWh output per year (iv) Load factor.2.2 Three 20 MVA, 11/0.66 kV, 50 Hz, 3-phase transformers are connected together to supply a mining load. State the main conditions necessary before these three transformers are connected together. (4) nit%202%20Thre....pdf A Unit%202%20Thre....pdf A Unit%201%20-%2.pdf 40) Show al 9:12 AM 7/24/2021A 3-phase star connected, 1500 kVA, 13 kV alternator has an armature resistance of 0.9 ohm and a synchronous reactance of 8.0 ohms. When carrying rated load voltage, calculate the generated voltage per phase at loads of I.) Unity P.F. ii.) 0.8 lagging P.F. iii.) 0.8 leading P.F. iv.) calculate the voltage regulation for each load and determine best regulation.
- In a given system of base power of 250 MW, and bus 3 is taken as reference. The per-unit reactances are X12 = 0.2 p.u., X13 = X23 = 0. 1 p.u. The power flow in the system is given as: PF12 = 50 MW, PF13 = 150 MW, PF23 = 50 MW. Based on readings from 2 meters (not including M12 meter), M13 = 145 MW (not calibrated), and M23 = 50 MW (well calibrated), deduce the flow on line 1-2. Select one: O a. PF12 = - 47.5 MW. O b. None of these O c. PF12 = 67.5 MW. O d. PF12 = 47.5 MW. O e. PF12 =- 57.5 MW. O f. PF12 = 57 MW.6. In figure below the rating of reactance and various components are shown. A load of 50MW at p.f. lagging is taking from the 33kv substation which is to be maintained at 30kv. Calculate the terminal voltage of the synchronous machine (Vs) in pu, also represent the line and transformer in series reactance. The system is three phase system V6 11 kV 132 kV 132 kV 33 kV 50 MW Line 0.8 p.f. lagging j1000 50 MVA X 10% 50 MVA X 12% 30 kVThe yearly load duration curve of a certain power station can be approximated as a straight line ; the maximum and minimum loads being 80 MW and 40 MW respectively. To meet this load, three turbine generator units, two rated at 20 MW each and one at 10 MW are installed. Determine (i) installed capacity (ii) plant factor (iii) kWh output per year (iv) load factor.