Chapter 6, Problem 6.65P

In transformers, the flux lost in the air is called nd as SKW. If th

When the load on a series generator is increased, then the fluxproducedwill increaseindirect proportion. Select one: True False

X₂=0.1 1 XL +03 Soto X₁ = 0.2 X = 0.1 X = 0.1 Above is the one-line diagram of a simple power system. Each generator is represented by an emf behind the subtransient reactance. All impedances are expressed in per unit on a common base. All resistances and shunt capacitance are neglected. The generators are operating on no load at their rated voltage with their emfs in phase. A symmetrical fault occurs at bus 1 through a fault impedance Z, =j0.08 per unit. a) Using Thevenin's Theorem, determine the impedance to the point of fault and the fault current in per unit. b) Find the bus voltages and line currents during the fault. 2 O oto

Is it right P that given is it input or output power, more over delta/Y 377V/281V ,2.99A/3.15A what does it mean for these . Also free shaft conditions mean?

When a generator fails, its power output is lost, and the result is an imbalance between total load plus losses and total generation. Thus the frequency will: Select one: a. Remain the same b. None of these O c. Increase O d. Drop

Determine 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 bus 0.3 모모

• T or F, modify the wrong part if False, please underline twice your answer if True or False.  During working operation of a wave-wound DC generator, since the generated EMF is directly proportional to the number of poles, you can increase the number of poles to increase the amount of generated EMF.

In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generator is connected in star with its star points grounded. The per unit impedances of each element on a 40 MVA base are given in Table 1 and the voltage levels are given in Table 2. 2 3 4 T1 L T2 8 101 · 101. İ Generator Z 0.01 +j [p.u.] 0.08 V₂ = V3 = V₁ = Figure 1: A section of the distribution system Transformer T1 Line Z 0.04 + j 0.03 + j 0.15000000000000002 0.06000000000000000 2 Table 1: Sequence impedances (p.u. on 40 MVA base) V BASE [KV] Voltages What are the voltages on bus (in p.u.)? V₁ = p.u. ਦਾ p.u. p.u. p.u. 0 Generator p.u. 0 3 Line Load Current A load current of 11.316 kA is flowing with a lagging power factor of 90 %. Convert this to a current vector in per-unit. IL = 10 Table 2: Voltage bases (kV) Transformer T2 0.04 + j 0.06000000000000000 Load 1 IL

When the load on a series generator is decreased, then the flux produced will be decreased in direct proportion. Select one: O True O False