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The fuel-cost curves for two generators are given as follows:
Assuming the system is lossless, calculate the optimal dispatch values of
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Chapter 6 Solutions
Power System Analysis and Design (MindTap Course List)
- A short shunt compound generator supplies a load of 20 kW at 500 V. The armature, series and shunt field resistance are 0.10 ohm, 0.05 ohm, and 100 ohms respectively. Find the power developed in the armature. Choices: 24600 W 20500 W 22800 W 25400 Warrow_forwardThe open-circuit characteristic of a DC generator is also called as characteristics. O internal O performance external O no load saturationarrow_forwardA 6 pole DC lap wound generator has 38 armature conductors with flux per pole is 42 mWb and the e.m.f generated is 78 V, then the speed of the machine is 48.87 rps O 3.87 rps O 0.39 rps O 48.87 rps When the load on a series generator is decreased, then the flux produced will be increased. Select one: O True O Falsearrow_forward
- Quèstion 7 A shunt generator running at 1000 r.p.m. has generated e.m.f. as 300 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly 300 480 420 360 A Movinn to another ouestion will caro thic roenonco P Type here to search O O O Oarrow_forward1. If the number of poles in a lap wound generator is doubled, then the generated emf will be a) double c) constant d) zero b) halfarrow_forwardProve that in a DC generator the maximum efficiency is obtained when constant loss is equal to the variable loss.arrow_forward
- • T or F, modify the wrong part if False, please underline twice your answer if True or False. The current that flows in the armature of a DC generator is DC in nature.arrow_forwardQuestion 7 The following diagram shows a DC generator delivering power to a static load under transient conditions. Ra Vt RL Rt Lt Load tir Vr Write expressions for the generated voltage (e,) in terms of the constant of proportionality, Ke.arrow_forwardFigure 1 shows an electric generator with 3 rotor windings as marked by a-1, b-2 and c-3. A permanent magnet is placed in the middle of the rotor with the rotational direction. The 3 rotor windings are connected through line to the three identical load resistors R₁, R₂ and R3 in Wye connection. The resulting currents in each line are la, lb and Ic. Design the generator-line-load connections, and propose the methodologies to construct 3-phase 3-wire connection. Use a diagram to justify your answers. D (0 N $1 Figure 1arrow_forward
- A DC generator with 8 pole, duplex lap winding excited with a flux of 3mWb/ pole. The number of parallel path in the winding is A 12 B 8 C 16 D 4arrow_forwardIf we need to use a DC generator witha very good voltage regulation we choose: * DC Generators cannot give very good Voltage Regulation Separately-Excited DC Generator Self-Excited Shunt wound DC Generator Self-Excited Series wound DC Generatorarrow_forwardDetermine the power angle characteristic for the system shown in figure. The generator is operating at a terminal voltage of 1.05p.u. and the infinite bus is at 1.p.u. voltage. The generator is supplying 0.7p.u power to the infinite bus. Draw the power angle curve in graph sheet. 0.1 0.3 Generator 0.2 Infinite 0.3 bus elearrow_forward
Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning