Given two thermal generating units with the following polynomial cost functions: Coal Fired: F1(P{) = 50 + 2P +0.02P?$/h; 40MW « P < 200MW Gas Fired : (F2(P2) = 50 + P2 + 0.04P?$/h; 60MW « P2 « 250MW \) In an economic dispatch, If the load is reduced to 180 MW, which case is cheaper? Select one: a. Unit 1 is OFF, and P2 = 180 MW b. P1 = 111.67 MW , P2 = 68.33 MW. C. P1 = 180 MW, and unit 2 is OFF. d. None of these e. P, = 120 MW , P, = 60 MW. O f. P1 = 114 MW, P2 = 66 Mw. Clear my choice

Given two thermal generating units with the following polynomial cost functions: Coal Fired: F1(P{) = 50 + 2P +0.02P?$/h; 40MW « P < 200MW Gas Fired : (F2(P2) = 50 + P2 + 0.04P?$/h; 60MW « P2 « 250MW \) In an economic dispatch, If the load is reduced to 180 MW, which case is cheaper? Select one: a. Unit 1 is OFF, and P2 = 180 MW b. P1 = 111.67 MW , P2 = 68.33 MW. C. P1 = 180 MW, and unit 2 is OFF. d. None of these e. P, = 120 MW , P, = 60 MW. O f. P1 = 114 MW, P2 = 66 Mw. Clear my choice

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.32MCQ: While the instantaneous electric power delivered by a single-phase generator under balanced...

See similar textbooks

Similar questions

Table Q2a Time (hours) 0-6 6-12 12-14 14-18 18-24 Load (MW) 45 90 135 150 75 Referring to the Table Q2a; i) Draw the load curve and the load duration curve [Use the graph paper provided] ii) Indicate the base load and the peak load on the graph. Determine the values for both loads. iii) Choose the suitable generating units to supply the load and list their operating schedules. Later, compute the total installed capacity. iv) Calculate the load factor and the plant capacity factor. Discuss the impact on the operating schedule if the plant capacity factor increases to 0.9.
Borduria Generation owns three generating units that have the following cost functions: Unit A: 15 + 1.4 PA + 0.04 P2 A $/h Unit B: 25 + 1.6 PB + 0.05 P2 B $/h Unit C: 20 + 1.8 PC + 0.02 P2 C $/h How should these units be dispatched if Borduria Generation must supply a load of 350 MW at minimum cost?
A Single Area consists of 3 generating units (G1/G2/G3) with the following characteristics: G1: 250 MVA rating, R1 = 0.02 pu (on the 250 MVA base), initial output P1 = 200 MW. G2: 350 MVA rating, R2 = 0.015 pu (on the 350 MVA base), initial output P2 = 300 MW. 0.03 pu (on the 300 MVA base), initial output P3 = 150 MW. G3: 300 MVA rating, R3 = The frequency of the system is 60 Hz. Assuming D = 1 pu on a common base of 1000 MVA, what is the new generation output for G3 for a load increase of 75 MW? Select one: O a. 190.55 MW O b. None of these O c. 203.38 MW d. 166.01 MW
Problem 3.1: Determine the rms value of voltage induced in an 80-turn coil on a 30 cm × 25 cm cross-section core with peak flux density 1.7 T alternat- ing at 60 Hz. Problem 3.2: Two parallel 1-phase rectangular bus bars 2 cm apart at their cen- ter lines experience 30,000 A,ms current when a load gets short-circuited. Determine the peak mechanical force per meter length of the bus bars. Assume the bus bar shape factor K = 0.85.
Electricity has composite demand. True False
Incremental fuel cost in Rs/MWh for a plant consisting two generating units G₁ and G₂ is dC₁ = 0.12 P₁ + 120 dP₁ dC₂ dP₂ = 0.25 P₂ + 200 Where, P₁ and P2 are the generation in MW of G₁ and G₂ respectively. If system is operating at economic dispatch with P1 = P2 = 180 MW and = 0.3 where, PL is dP SP, 2 the transmission loss, then the penalty factor of G₁ will be ?
A generating station having two thermal generating units shown below with minimum and maximum generations of 45 MW,60 MW and 600 MW, 800 MW respectively, have the Gen-2 following cost equations. Gen-1 C, = 0.065 Pc1? + 25 Pc1 + 400 OMR / Hr C2 = 0.082 Pc2² + 8 Pc2 + 320 OMR / Hr Calculate the saving when they share load as per economic load dispatch compared to load sharing proportional to their maximum generation. Neglect line losses. 280 MW 400 MW
Real Power Versus Voltage curve may be used to assess the a.Steady state voltage stability b.Loading of that particular AC Generator c.Dynamic voltage stability d.Complete Voltage stability 2- kinetic energy stored in the rotor of a synchronous alternator is given by a.G * H * w b.m * a c.0.5*m*v*v d.S * H
A 500 MVA synchronous machine has H, = 5.6 MJ/MVA and a 1200 MVA machine has H₂ = 2.0 MJ/MVA. The two machines operate in parallel in a power station. What is the equivalent. H constant for the two, relative to a 100 MVA base?
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.
A generating station has a maximum demand of 20 MW, a load factor of 60%, a plant capacity factor of 48% and a plant use factor of 80% Find: 1)the daily energy produced (2) the reserve capacity of the plant. (3) The maximum energy that could be produced daily if the plant was ruinining all the time.(4).Maximum energy that could be produced daily if the plant was running fully loaded and according to an operating schedule.
Q2/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 turbine-generator units, two rated at 30 MW each and one at 20 MW are installed. Determine (a) plant factor (b) kWh output per year (c) load factor.