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As shown in Figure, a 25-MVA, 13.8-kV, 60-Hz synchronous generator with X"d = 0:15 per unit is connected through a transformer to a bus that supplies four identical motors. The rating of the three-phase transformer is 25 MVA, 13.8/6.9 kV, with a leakage reactance of 0.1 per unit.
Each motor has a subtransient reactance Xd" = 0.2 per unit on a base of 5 MVA and 6.9 kV. A three-phase fault occurs at point P, when the bus voltage at the motors is 6.9 kV.
Determine:
(a) the subtransient fault current,
(b) the subtransient current through breaker A,
(c) the symmetrical short-circuit interrupting current (as defined for circuit breaker applications) in the fault and in breaker A.
1. How much energy is stored by a 100 mH inductor with a current of 1 A? 2. A 15 kHz sinusoidal voltage is applied to a series RL circuit. Determine the frequency of I, VR, and VL.
The following 10 exercises build upon your previous education and training along with the sample math problems you studied in this module. The assignment problems will challenge you to put all those elements together.
Plot the spectrum of a PAM wave produced by the modulating signal m (t) Am cos (2ipA?mt) assuming a modulation frequency A?m = 0.25 Hz, sampling period Ts = 1 s, and pulse duration T = 0.45 s.
Outriggers A and B are used to stabilize the crane from overturning when lifting large loads. If the load to be lifted is 3 Mg, determine the maximum boom angle ? so that the crane does not overturn.
Determine the number of theoretical stages required and the optimal-stage locations for the feed and liquid side stream for the distillation process shown in Figure assuming that methanol (M) and ethanol (E) form an ideal solution.
A personal observation, or an experience with, or an example of a real world application of the topic. Try looking the topic(s) up on the internet if nothing occurs to you offhand, or find some examples.
This plan must include each of the seven Integrated Team Projects and the TPP-2, including individual assignments, with leadership assigned to each assignment and working assignments for each team member.
Evaluate the stability using Rouths Hurwartz criterion and obtain the range of K value for the stability under various controllers and evaluate the relative stability of the system with P and I controllers.
Produce a system-wide (non-functional) requirement document that documents the architectural requirements the system must address.
ENG1068 Electronic Instrumentation Assignment. Assuming that you have an ac power source of 10V (60Hz). Design a silicon based filtered full-wave bridge rectifier circuit that gives dc voltage output Vdc, varying at most ±5%. Calculate the required..
We have a load resistance of 50Ω that we wish to supply with 5V. A 12.6-V voltage source and resistors of any value needed are available. Draw a suitable circuit consisting of them voltage source, the load, and one additional resistor. Specify the..
Microeconomic theory used (5 slides total), no provided source, you guys need to think professionally and get it from good source of information about: Sticky price (with graph/chart), Opportunity cost on oil and gas Australia( with chart) and Weig..
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