A single area consists of two generating units, rated at 400 and 800 MVA, with speed regulation of 4 percent and 5 percent on their respective ratings. The units are operating in parallel, sharing 700 MW. Unit 1 supplics 200 MW and Unit 2 supplies 500 MW at 1.0 per unit (60 Hz) frequency. The load is increased by 130 MW. a) Assume there is no

3. Obtain the priority list of unit commitment using full load average production cost for the given data: Heat rate for unit 1, H = 510+ 7.2P. + 0.0014P2 MW/hr Heat rate for unit 2, H, = 310+ 7.85P + 0.00194P2 MW/hr Heat rate for unit 3, H3 = 78 +7.97P3 + 0.00482P3 MW/hr The power demand is 550 MW.

The load-duration curve for this period is a straight line from the 100% to the 80% load points. The economic loading order for this system is the 50 MW unit first, followed by the 30 MW units A, B and C, in that order. Calculate the expected energy provided to the system by the 50 MW unit and by the 30 MW unit C. Answers in 6 decimal places.

A single area consists of two generating units with following characteristics: Unit Rating Speed Regulation R (pu on unit MVA base) 1 800 MVA 4 % 2 400 MVA 5% 2 The units are operating in parallel, sharing 1000 MW at the nominal frequency. Unit 1 supplies 700 MW and unit 2 supplies 300 MW at 50 Hz. The load is increased by 84 MW. a)Assume there ...

1) The maximum radiation intensity of a 90% efficiency antenna is 200 mW/unit solid angle. Find the directivity (Do in dB) and gain (Go in dB) when the input power is 125.66 mW (25 marks)

A thermal power plant consists of two 60 MW units, each running for 2000 hours and one 30 MW unit running for 2000 hours per year. The energy produced by the plant is 876 À 106 kWh/year. Determine the: a) Plant Load Factor by Plant Use Factor

Engineering; Electrical Engineering; Electrical Engineering questions and answers; Problem 4. (10 points).Consider a small system with 3 generators with the following parameters (all units in MW):Unit 1: C1(p1)=300+8p1+0.2p12,P1min =200MW and P1min =600MW.Unit 2: C2(p2)=500+5p2+0.4p22,P2min=250MW and P2min=500MW.Unit 3: C3(p3)=50+12p3+0.5p32,P3min=120MW and P3min=400MW.Each ...

The maximum radiation intensity of a 90% efficiency antenna is 200 mW/unit solid angle. Find the directivity (Do in dB) and gain (Go in dB) when the input power is 125.66 mW. (25 marks) In target-search ground-mapping radars it is desirable to have echo power received from a target, of constant cross section, to be independent of its range.

Question: The following are data pertaining to three units in a plant. Unit 1: C1 = 510 + 7.92 P4 +0.0017 P 2 R/h; Min. = 250 MW; Max. = 600 MW Unit 2: C2 = 310 + 7.85 P2 +0.0019 P22 R/h; Min. = 200 MW; Max. = 400 MW Unit 3: Cz = 78 +9.56 P3 + 0.0069 P32 R/h; Min. = 150 MW; Max. = 500 MW = What unit or combination of units should be used to supply a load of 550 MW

Question: 5. The maximum radiation intensity of a 90% efficiency antenna is 200mW/unit solid angle. Find the directivity and gain (dimensionless and in dB) when the: (a) Input power is 125.66 mW. (b) Radiated power is 125.66 mW.