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The following readings are taken from the result of anopen-end and a short circuit test on a 9375-kVA three-phaseY-connected 13,800-V (line to line) two pole 60 Hz turbinegenerator driven at synchronous speed:Field currentA 169 192Armeture current, short-curcuit test,A 392 446Line Voltage, open-circuitcharacteristic,V 13,000 13,800Line voltage, air gap line,V 15,400 17,500The armature resistance is 0.064 Ω /phase. The armeture leakage reactance is 0.10 per unit on the generator rating as abase. Find(a) the unsaturated value of the synchronous reactance inohms per phase and per unit, (b) the short-circuit ratio, and (c)the saturated reactance in per unit and ohms per phase.
a)Write the diffrenece equation for a four-term moving average filter. b) The input x[n] = cos(n pi/6)u[n] is passed through the four-term moving average filter. Solve for the first 5 samples of the output.
(a) Find the locus of the closed-loop roots (poles) with respect to K; (b) Is there a value of K that will cause all roots to have a damping ratio greater than 0.5 (c) Find the values of K that yield closed-loop poles with the damping ratio
A three-phase load is Y-connected. The load has a phase voltage of 139 V and a phase current of 49 A. Each phase of the load consumes 5.1 kW of power. (A) Sketch and label the load. Find (b) the line voltage, (c) the line current, and
Your Woods chip will be 150 mm2 and will make a profit of $20 per defect-free chip. Your Mark on chip will be 250 mm2 and will make a profit of $25 per defect-free chip. Your fabrication facility will be identical to that for the Power5. Each wafe..
An iron core of cross-sectional area 200 square mm and length 320mm is evenly wound with a coil of 100 turns. When a current of 0.35A flows in the coil, a magnetic flux density of 0.12T is set up in the iron core.
A 230 kV, 60 Hz, three-phase transposed overhead transmission line has one ACSR 954 kcmil conductor per phase and flat horizontal spacing with 8 m between adjacent conductors. Determine the inductance in H/m and the inductive reactance
two λ/2 dipoles are placed parallel to each other and spaced by a distance d = .15 λ , they are fed with antiphase currents so that I2=-I1=.7 Ampere, i- find the power radiated by the system taking into account the mutual impedance betwen the dipol..
a) What are the FIVE requirements for synchronizing the alternator tot he grid b) What should happen once the synchronous alternator is synchronized At that very instant, what should happen if the above five conditions are met
Consider a MOS device with the following parameters: Aluminum gate, p- typ_e silicon substrate, oxide thickness of 20nm, and surface fixed oxide charge of 4x1010 cm-2 (a) Determine the doping concentration such that the threshold voltage is 0.5V.
A parking garage charges a $ 5.00 minimum fee to park for up to three hours and an additional $ 1.00 per hour for each hour over the hours. the maximum charge for any given 24 hours period is $ 2.00.
An op-amp is connected in the noninverting amplifier configuration. A gain of 21 is achieved using resistors ofvalue 1Mohm and 50 kohms in the feedback circuit. The signal source is connected to the v+ terminal via a 100 ohm resistor.
Find the range of values of "k" for which the system has two real, distinct, and stable poles. c) Find the value of k such that the system has a percent overshoot between 5% and 10%. d) Find the system sensitivity to k. e) Find the system type as ..
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