Power System Analysis And Design SI Edition 6th Edition By Glover – Test Bank

ECE 476

Examination #1
Tuesday , October 11, 2011

Closed e-book, closed notes One bear in mind sheet allowed

Complete

1. ________ / 25
2. ________ / 20
3. ________ / 25
4. ________ / 30________ / 100

1. (25 elements full)

A 3, 300 mile, 345-kV line has sequence impedance of z = 0.03 j0.4 /mile and shunt admittance y = j5.0 x 10-6 mho/mile.

(9 pts) a. (9 pts) b.

(7 pts) c.

Calculate the street’s attribute impedance Zc and the propagation mounted 

Initially assume that the receiving end of the street is open-circuited and has a line to line voltage of 345 kV. Calculate the sending end line to line voltage magnitude.

Draw the prolonged line  equal circuit for this line, displaying the values of all parameters.

2. (20 elements full)

The circuit confirmed beneath is a balanced three part system with a wye-associated generator producing 1 volt (part to neutral). Assume that each inductor has an impendance ZL = j10 and each capacitor ZC = -j15. Resolve Ia, Icap, and the entire three part superior vitality outfitted by the y-associated voltage provide.

3. (25 elements full)

A 3-part, 60Hz, 50km prolonged, totally transposed transmission line is constructed using Drake conductor. Drake conductor has an outside diameter of 1.108 inches; stranding of 26/7 (Al/St), which yields a GMR for the conductor of 0.0375 toes. Resistance at 60-Hz for this conductor is 0.117 /mile. A horizontal tower configuration is used, with a piece spacing of 25 toes (25 toes between left and center phases, 25 toes between center and correct, and subsequently 50 toes between left and correct). Bundling is used, with 2 conductors per part, spaced 1 foot apart. For reference μ0 = 4π x 10-7 H/m and Ɛ0 = 8.854 x 10-12 F/m.

1. a)  Uncover the optimistic sequence inductance in H/m and inductive reactance in Ω/km.
2. b)  Uncover the capacitance to neutral in F/m and the admittance to neutral in S/km. Neglect the influence of the earth plane.
3. c)  Given that line is 50km, we’re in a position to make the short line approximation. Draw the short line π equal circuit, labeling relevant values.

For reference  = 4 x 10-7 H/m and 0 = 8.854 x 10-12 F/m. There are 1609 meters per mile.

4.

A.

B.

C.

D.

E.

Plenty of Different. Circle in all probability essentially the most applicable reply. Ten points, three elements each for a whole of 30 elements.

Discover this Disadvantage Continues on the Subsequent Net web page

As talked about at school, the most common load model for the ability motion is

1. Mounted impedance
2. Mounted current
3. Mounted vitality

We are going to

1. All a whole lot and sources are Y associated
2. All a whole lot and sources are delta associated
3. There isn’t any such factor as a mutual inductance between phases
4. A and C
5. B and C

Which assertion about part and line voltages (V) and currents (I) in Wye and Delta connections is suitable?

1. Part I = line I in Wye, and part V = line V in Delta
2. Part I = line I in Delta, and part V = line V in Wye
3. Part I = line I and part V = line V in Wye
4. Part I = line I and part V = line V in Delta

Using Newton’s approach to resolve the equation x2 –sin(x) – 2 = 0, with an preliminary guess of x=1 (that is, its price on the zero iteration), select the value that is closest to the value of x after the second iteration:

A. 1.6754 B. 1.7775 C. 1.8073 D. 2.3041 E. 2.3253

The impedance of a ten MVA, 22/220 kV transformer is 0.2 per unit. What’s that this impedance in per unit for an affect base of 10 MVA, and a voltage base of 11 kV on the low voltage aspect of the transformer?

1. 0.05 p .u.
2. 0.1 p  .u.
3. 0.2 p .u.
4. 0.4 p.  u.
5. 0.8 p  .u.

solely use per part analysis when:

6. Transformer open circuit (OC) and fast circuit (SC) exams allow us to calculate positive equal circuit values. Which parameters are calculated from the OC verify and which are from the SC verify?
   1. The OC verify gives the resistances and the SC verify gives the reactances
   2. The OC verify gives the sequence impedance and the SC verify gives the shunt admittance
   3. The OC verify gives the shunt admittance and the SC verify gives the sequence impedance
   4. The OC verify gives the voltages and the SC verify gives currents