armature COSO Q4/Two generator operating in parallel to supply the following loads: 100kW lighting, 50kW at 0.9 lag P.F, 50kW at 0.8 lag p., and 20kW at 0.9 leading p.f. if the first generator supplying power of 120kW at 0.95 lagg. Find P2 and cosq2. 220-120 Par P₁+P+ Py-120 QI+G+QU chronous impedance of

armature COSO Q4/Two generator operating in parallel to supply the following loads: 100kW lighting, 50kW at 0.9 lag P.F, 50kW at 0.8 lag p., and 20kW at 0.9 leading p.f. if the first generator supplying power of 120kW at 0.95 lagg. Find P2 and cosq2. 220-120 Par P₁+P+ Py-120 QI+G+QU chronous impedance of

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

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.10P

See similar textbooks

Similar questions

Suppose two generators supplying a load. Generator-1 has a no-load frequency of 61.5 Hz and a slopesp1 of 1 MW/Hz. Generator-2 has a no-load frequency of 62 Hz and a slope sp2 of 1MW/Hz. The twogenerators are supplying a real load totaling 2.5 MW at 0.8 PF lagging. Draw the resulting systempower-frequency or house-diagrams. Determine (a) at what frequency is the system operating, andhow much power is supplied by each of the generators? (b) if an additional 0.75-MW load wereattached to this power system. What would the new system frequency be, and how much powerwould the each generator supply now? (c) with the system in the configuration described in part (b),what will the system frequency and generators power be if the governor set points on generator-1 areincreased by 0.5 Hz?
. A system consists of two plants connected by a tie and a load is located at plant two. When 100MW are transmitted from plant one a loss of 10MW takes place on the T-line . Determine the generating schedule at both the plant and the power received by the load when λ for the system is GHC 25 per megawatt hour and the incremental fuel cost are given by the equation dF1dP1=0.031P1 + 17 GHC/ MWh ; dF2dP2=0.06P2 + 19 GHC/MWh
15. A certain generator has an open-circuit voltage of 12 V and an internalresistance of 40Ω . Calculate: (a) the load resistance for maximum powertransfer; (b) the corresponding values of the terminal voltage and of thepower supplied to the load.If the load resistance were increased to twice the value for maximum powertransfer, what would be the power absorbed by the load?
If the generator cost function of three generators are given as: F1 = 484.8 + 7.67P1 + 0.5P12 (OMR/h/MW) F2 = 465.9 + 8.07P2 + 0.2P22 (OMR/h/MW) F3 = 478.9 + 7.76P3 + 0.62P32 (OMR/h/MW) Find the optimal dispatch of the three generators. Total load demand is 1740 MW. Lambda() Answer for part 1 Power P1 Answer and unit for part 2 PowerP2 Answer and unit for part 3 Power P3 Answer and unit for part 4
A 3 phase, wye-connected salient-pole generator has on per phase basis Xd = 2 ohms, Xq = 1.5 ohms and R∅ = 0. When delivering its maximum power output to an infinite bus bar, the terminal and excitation voltages/phase are 1,430 V and 1,495 V, respectively. Find the power angle in electrical degrees at the above conditions
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, %
What is voltage stability? How is reactive power linked with the voltage stability in the power system? Write down the effect of ‘Load Tap Changer (LTC)’ on voltage stability and analyze very briefly using P-U (nose) curve.
For the power system of Figure Q4.1, all per unit quantities have been calculated usinga common base. The generator delivers power p∞ = 1 p. u. at a lagging power factor ofcos= 0.93. i) Calculate the internal voltage of the generator, the maximum electrical powerthat the generator can deliver to the system during the steady state operationand the steady state rotor angle, σ0, of the generator.ii) A three-phase fault occurs at busbar 3 and it is cleared by simultaneouslydisconnecting lines 13 and 23. Following the fault clearing, the systemcontinues to operate with only line 12 in service. Determine the new steadystate rotor angle, σ1, of the generator and the maximum power the generatorcan deliver to the system post fault.iii) Assuming that the post fault condition is small disturbance stable and that thereis no negative interaction among system controllers, calculate the criticalclearing angle, σcr, at which the fault should be cleared to ensure the generatorreaches a new steady…
For the power system of Figure Q4.1, all per unit quantities have been calculated usinga common base. The generator delivers power p∞ = 1 p. u. at a lagging power factor ofcos= 0.93. i) Calculate the internal voltage of the generator, the maximum electrical powerthat the generator can deliver to the system during the steady state operationand the steady state rotor angle, σ0, of the generator.ii) A three-phase fault occurs at busbar 3 and it is cleared by simultaneouslydisconnecting lines 13 and 23. Following the fault clearing, the systemcontinues to operate with only line 12 in service. Determine the new steadystate rotor angle, σ1, of the generator and the maximum power the generatorcan deliver to the system post fault.
Q2. The O.C.C for a shunt generator at (1000 r.p.m) given by:lf(A) 0.2 0.5 1.0 1.5 2.1 2.4 3 4.2 4.8E(V) 28 72 144 202 245 270 300 345 360The armature resistance equal (0.5 ohm) and shunt field resistance equal (83.33 ohms). If the machine is driven at (1100 r.p.m) find:(a)The load current if the load resistance equal (9 ohms). (b)The number of series winding to convert the machine to level compound at (345 V) at armature .current of (100 A)
A Y-connected, 3-phase, 1732 V, 120 kVA, synchronous generator has a synchronous reactance of 1.2 Ω/ph???. Feeds the specified load with pf = 0.9(+) . Fixed losses are assumed to be 5% of developed power. Find: A. The tension generated. b. The power angle. c. Voltage regulation. d. Efficiency. E. Phasor and Power Flow Diagrams
Two three-generator are parallel at 6.6 kV and delivering 3000 kW at 0.8 pf. The impedance for machine A is 0.5+j10 ohm and for B 0.4+j12 ohm. The excitation of A is adjusted to deliver 150 A at lagging pf. Determine the induced emf of machine A.