system which consist of two power plants, the incremental cost in GHC/MWhr are dC₁ dP -= 0.17 P₁ + 140
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Power Generation Company has a system which consist of two power plants, the incremental cost in
$/ MWhr are
The system operates on economic dispatch with P1 = P2 = 220MW
and
Step by step
Solved in 2 steps
- A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)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?A generator operating at 50 Hz delivers 1 p.u. power to an infinite bus through a transmission circuit in which resistance is ignored. A fault takes place reducing the maximum power transferable to 0.5 p.u. Where as before the fault, this power was 2.5 p.u. and after the clearance of the fault, it is 2 p.u. The value of 8 is max
- 8 = 0 Q1: What does happen if we change two currents? Q2: What does happen if we have a three-phase four poles machine? a Q3: What does happen if we have a two-phase two poles machine? Q4: What does happen if we apply a capacitance in phase b and then use same voltage for both phase. Dr. Ali K....p. . --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.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
- Q20. The section bus-bars A and B as shown in Figure B5 are linked by a bus-bar reactors each rated at 5000 kVA with 10% reactance. On bus-bar A, there are two generators each of 10,000 kVA with 10% reactance and on B two generators each of 8000 kVA with 12 % reactance. Find the Current and MVA that fed into a dead short circuit between all phases on B with bus-bar reactor in the circuit. Page 4 of 5 جامعة التقنية والعلومر التطبيقية بإبراء University of Technology and Applied Sciences - Ibra Student ID: Section: Student Name: 8,000 kVA 12% 10,000 kVA 10,000 kVA 10% 8,000 kVA 12% 10% 2 3 5,000 kVA 10% lell 8,000 kVA 10% Figure B5 "End of Question Paper"Hoover Dam has a nameplate capacity of 2080 MW[] and an annual generation averaging 4.2 TW·h. (The annual generation has varied between a high of 10.348 TW·h in 1984, and a low of 2.648 TW·h in 1956.) Determine the capacity factor. Ans. 23% (Show the Solutions)Solve for the nodal voltages and the power consumed by the passive elements.