Combined Cycle Power Plants are having higher efficiency comparing to open cycle Power plant because of. ..... .........e. O a. Availability of compressor O b. Availability of HRSG O C Availability of Gas Turbine O d. Availability of Filter Pump
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- 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.)An industrial plant consisting primarily of induction motor loads absorbs 500 kW at 0.6 power factor lagging. (a) Compute the required kVA rating of a shunt capacitor to improve the power factor to 0.9 lagging. (b) Calculate the resulting power factor if a synchronous motor rated at 500 hp with 90 efficiency operating at rated load and at unity power factor is added to the plant instead of the capacitor. Assume constant voltage (1hp=0.746kW).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 to
- Two alternators A and B are in parallel and supplying a 600-V,60 Hz bus load consisting of a 270 kVA unity power factor load a group of induction motors totaling 420 kVA at 89.4 percent power factor and a synchronous motor that draws 300kVA at 92.3 percent power factor leading. If the machine A is carrying 60 percent of the total active power load at a power factor of 70.4 percent lagging, determine the active and reactive components supplied by machine B.A single-phase alternator connected to 6,600-V bus-bars has a synchronous impedance of 10Ω and a resistance of 1 Ω. If its excitation is such that on open circuit the p.d. would be 5000 V, calculate the maximum load the machine can supply to the external circuit before dropping out of step and the corresponding armature current and p.f. [2864 kW, 787 A, 0.551]For one-phase appliance of R-L type (e.g. electrical motor) with active input power P = 10 kW and power factor cosϕ = 0,75 design a power-factor capacitor to compensate the power factor to the standardized value of cosϕk = 0,95. Supply voltage is V = 230 V. Calculate capacitor reactive power, its capacity and current.
- A Turgo type hydro-electric plant uses a 92% efficiency generator to produce its rated output of 32.5 MW. It was observed during its operation that the mechanical loss is 4.25 MW. Also, from the penstock down to the turbine, 14.3% hydraulic head loss and 8.9% leakage loss occurs which are equally distributed and based on the parameters at the dam. The average elevation from the headrace to the jet centerline is 40 m and from the tailrace to the jet centerline is 4.5 m. compute the following: a. Power by the turbine, kW b. Volume flow rate at the source, m3/s c. Power by the jet, kW d. Mechanical Efficiency, %Pls. Answer thank you! A generating station has a maximum demand of 25MW, a load factor of 60%, a plant capacity factor of 50% and a plant use factor of 72%. Find the reserve capacity of the plant in MW.A generator of 380 Vrms and 60Hz feeds a parallel association between a 2kW heater and 30kVA induction motor (synonymous with inductive) with a power factor=0.82. Determine (a) the complex power of the system; (b) the active and reactive power delivered by the generator; (c) the value of the capacitor needed to raise the Power Factor to 0.92 (delayed).
- synchronous generator operating under steady conditions supplying a load current I0to the bus at a terminal voltage of V0. E, is the induced emf under loaded condition and Xa is the direct axis synchronous reactance of the machine. Draw the equivalent circuit model of the system.An a electric power system A 200 MW unit with 0.05 pu turbine operates in parallel with a 400 MW unit of identical turbine regulation. For a specified amount of power demand in crease, find the ratio of sharing of the Load by the units, system frequency is 50Hz .Question 1. a) What is the need of compensation in power system? b) Give the schematic diagram showing a shunt compensator on a distribution transformer. c) Give the desirable characteristic features f a shunt compensator. d) List different methods used in shunt compensator. e) Name two power factor correction method. f) Define Facts and name 2 series connected facts devices g Draw a circuit diagram of a Static Synchronous Series Compensator (SSSC) and gives his applications.